logo Calflora  Illustrated Plant List 
Santa Rosa Plateau Preserve
Riverside County

Lathrop and Thorne  / The Nature Conservancy  (1978-01-01)

Record Detail Nearby Surveys What Grows Here?
586 PLANTS
native
Perennial herb

ASTERACEAE

Achillea millefolium var. californica
© 2022 Andy Ford
Achillea millefolium var. californica
© 2020 Bob Sweatt
Achillea millefolium var. californica
© 2018 Gary McDonald

Acourtia microcephala    Sacapellote
native
Perennial herb

ASTERACEAE

Acourtia microcephala
© 2022 Diane Etchison
Acourtia microcephala
© 2019 Ron Vanderhoff
Acourtia microcephala
© 2021 Aaron Echols

native
Tree, Shrub

ROSACEAE

Adenostoma fasciculatum
© 2019 Steve Matson
Adenostoma fasciculatum
© 2019 Steve Matson
Adenostoma fasciculatum
© 2019 Steve Matson

Adiantum jordanii    Adiantum,  maiden hair fern
native
Fern

PTERIDACEAE

Adiantum jordanii
© 2022 BOB CASE
Adiantum jordanii
© 2019 Ron Vanderhoff
Adiantum jordanii
© 2023 Mike Russler

Agoseris grandiflora    Bigflower agoseris,  California dandelion,  Giant mountain dandelion
native
Perennial herb

ASTERACEAE

Agoseris grandiflora
© 2014 Steve Matson
Agoseris grandiflora
© 2014 Steve Matson
Agoseris grandiflora
© 2014 Steve Matson

Agoseris retrorsa    Spear leaved agoseris,  Spearleaf agoseris,  Spearleaf mountain dandelion
native
Perennial herb

ASTERACEAE

Agoseris retrorsa
© 2018 Steve Matson
Agoseris retrorsa
© 2018 Steve Matson
Agoseris retrorsa
© 2018 Steve Matson

Agropyron elongatum    Tall wheat grass
non-native
Perennial grass

POACEAE

Agropyron elongatum
© 2021 Lenihan Mazur
Agropyron elongatum
© 2020 ALice Cummings
Agropyron elongatum
© 2020 Ron Vanderhoff

Agrostis diegoensis    Leafy bent grass,  Diego bent grass,  Seashore bentgrass
native
Perennial grass

POACEAE

Agrostis diegoensis
© 2021 John Rawlings
Agrostis diegoensis
© 2020 Susan McDougall
Agrostis diegoensis
© 2021 John Rawlings

Agrostis semiverticillatus    Water beard grass
non-native
Perennial grass

POACEAE

Agrostis semiverticillatus
© 2022 Ron Vanderhoff
Agrostis semiverticillatus
© 2021 Ron Vanderhoff
Agrostis semiverticillatus
© 2019 Friends of Five Creeks volunteers

Agrostis stolonifera var. major    Creeping bentgras,  Giant bentgrass,  Redtop
non-native
Perennial grass

POACEAE

Agrostis stolonifera var. major
© 2023 Dana York
Agrostis stolonifera var. major
© 2023 Dana York
Agrostis stolonifera var. major
© 2022 John Rawlings

Aira caryophyllea    Shiver grass,  Silver hairgrass,  Silvery hairgrass
invasive non-native
Annual grass

POACEAE

Aira caryophyllea
© 2005 Steve Matson
Aira caryophyllea
© 2005 Steve Matson
Aira caryophyllea
© 2005 Steve Matson

Allium haematochiton    Red skinned onion,  Redskin onion
native
Perennial herb (bulb)

ALLIACEAE

Allium haematochiton
© 2017 Steve Matson
Allium haematochiton
© 2017 Steve Matson
Allium haematochiton
© 2017 Steve Matson

native
Perennial herb (bulb)

ALLIACEAE

Allium lacunosum ssp. lacunosum
© 2016 Steve Matson
Allium lacunosum ssp. lacunosum
© 2016 Steve Matson
Allium lacunosum ssp. lacunosum
© 2016 Steve Matson

Allium peninsulare    Mexicali onion
native
Perennial herb (bulb)

ALLIACEAE

Allium peninsulare
© 2022 Rhonda Allen
Allium peninsulare
© 2019 Diane Etchison
Allium peninsulare
© 2019 Diane Etchison

Allophyllum glutinosum    Sticky false gilia,  Sticky false gilyflower
native
Annual herb

POLEMONIACEAE

Allophyllum glutinosum
© 2020 Ron Vanderhoff
Allophyllum glutinosum
© 2019 Ron Vanderhoff
Allophyllum glutinosum
© 2019 Diane Etchison

Alnus rhombifolia    White alder
native
Tree

BETULACEAE

Alnus rhombifolia
© 2005 BOB CASE
Alnus rhombifolia
© 2014 Garth Wadsworth
Alnus rhombifolia
© 2023 Ron Vanderhoff

Alopecurus howellii    Pacific foxtail
native
Annual grass

POACEAE

Alopecurus howellii
© 2016 David Greenberger
Alopecurus howellii
© 2023 Ron Vanderhoff
Alopecurus howellii
© 2023 Ron Vanderhoff

Amaranthus albus    Pigweed amaranth,  Tumbleweed
non-native
Annual herb

AMARANTHACEAE

Amaranthus albus
© 2014 Steve Matson
Amaranthus albus
© 2014 Steve Matson
Amaranthus albus
© 2018 Ron Vanderhoff

Amaranthus blitoides    Mat amaranth,  Prostrate amaranth,  Prostrate pigweed
native
Annual herb

AMARANTHACEAE

Amaranthus blitoides
© 2020 Ron Vanderhoff
Amaranthus blitoides
© 2023 Helen Hancock
Amaranthus blitoides
© 2019 Camille Nowell

Amaranthus californicus    California amaranth,  California pigweed
native
Annual herb

AMARANTHACEAE

Amaranthus californicus
© 2016 Gerald Carr
Amaranthus californicus
© 2014 Jim Richards
Amaranthus californicus
© 2016 Gerald Carr

Amaranthus retroflexus    Green amaranth,  Red root pigweed,  Red rooted amaranth
non-native
Annual herb

AMARANTHACEAE

Amaranthus retroflexus
© 2017 Ingrid Cabada
Amaranthus retroflexus
© 2022 Jennifer Mo
Amaranthus retroflexus
© 2021 Ron Vanderhoff

Ambrosia psilostachya var. californica    Ragweed,  Western ragweed
native
Perennial herb

ASTERACEAE

Ambrosia psilostachya var. californica
© 2021 Mary Ann Machi
Ambrosia psilostachya var. californica
© 2022 Ron Vanderhoff
Ambrosia psilostachya var. californica
© 2022 Ron Vanderhoff

Amorpha californica    California false indigo,  False indigo,  Mock locust
native
Shrub

FABACEAE

Amorpha californica
© 2019 Ron Vanderhoff
Amorpha californica
© 2022 Suzanne L. Weakley
Amorpha californica
© 2018 Jennifer Poore

Amsinckia intermedia    Common fiddleneck
native
Annual herb

BORAGINACEAE

Amsinckia intermedia
© 2020 Matt Berger
Amsinckia intermedia
© 2019 Ron Vanderhoff
Amsinckia intermedia
© 2021 David popp

Amsinckia menziesii    Menzies' fiddleneck,  Small flowered fiddleneck
native
Annual herb

BORAGINACEAE

Amsinckia menziesii
© 2020 Ron Vanderhoff
Amsinckia menziesii
© 2018 Gary McDonald
Amsinckia menziesii
© 2018 Gary McDonald

Anagallis arvensis    Scarlet pimpernel
non-native
Annual herb

MYRSINACEAE

Anagallis arvensis
© 2017 B.J. Dion
Anagallis arvensis
© 2022 Chris McDonald
Anagallis arvensis
© 2023 Ron Vanderhoff

Anagallis minima    Chaffweed
native
Annual herb

MYRSINACEAE

Anagallis minima
© 2020 Ron Vanderhoff
Anagallis minima
© 2018 Hayley Ross
Anagallis minima
© 2020 Ron Vanderhoff

Anemopsis californica    Yerba mansa
native
Perennial herb

SAURURACEAE

Anemopsis californica
© 2022 Steve Matson
Anemopsis californica
© 2022 Steve Matson
Anemopsis californica
© 2022 Steve Matson

Anthemis cotula    Dog fennel,  Mayweed, dog fennel,  Stinking chamomile
invasive non-native
Annual herb

ASTERACEAE

Anthemis cotula
© 2017 Diane Etchison
Anthemis cotula
© 2019 Nathan Taxel
Anthemis cotula
© 2019 Dave Beller

Antirrhinum coulterianum    Coulter snapdragon,  Coulter's snapdragon
native
Annual herb

PLANTAGINACEAE

Antirrhinum coulterianum
© 2019 Lynn Sweet
Antirrhinum coulterianum
© 2019 Aaron Echols
Antirrhinum coulterianum
© 2019 Hailey Laskey

Antirrhinum kelloggii    Climbing snapdragon,  Kellogg's snapdragon,  Lax snapdragon
native
Annual herb

PLANTAGINACEAE

Antirrhinum kelloggii
© 2024 David Strauch
Antirrhinum kelloggii
© 2019 David Greenberger
Antirrhinum kelloggii
© 2019 Ron Vanderhoff

Antirrhinum nuttallianum    Island snapdragon,  Nuttall's snapdragon
native
Annual, Perennial herb

PLANTAGINACEAE

Antirrhinum nuttallianum
© 2023 Caitlin Kreutz
Antirrhinum nuttallianum
© 2021 Ron Vanderhoff
Antirrhinum nuttallianum
© 2023 Caitlin Kreutz

Apiastrum angustifolium    Mock parsley,  Wild celery,  Wild parsley
native
Annual herb

APIACEAE

Apiastrum angustifolium
© 2020 Ron Vanderhoff
Apiastrum angustifolium
© 2020 Ron Vanderhoff
Apiastrum angustifolium
© 2020 Ron Vanderhoff

Apium graveolens    Smallage,  Garden celery
non-native
Annual, Biennial herb

APIACEAE

Apium graveolens
© 2016 Joan Hampton
Apium graveolens
© 2019 Nathan Taxel
Apium graveolens
© 2016 Joan Hampton

Apocynum cannabinum    Indian hemp,  Indianhemp dogbane,  HEMP DOGBANE
native
Perennial herb

APOCYNACEAE

Apocynum cannabinum
© 2019 Ron Vanderhoff
Apocynum cannabinum
© 2015 Ron Vanderhoff
Apocynum cannabinum
© 2021 Mike Russler

Arctostaphylos glandulosa ssp. glandulosa    Eastwood manzanita,  Eastwood's manzanita
native
Shrub

ERICACEAE

Arctostaphylos glandulosa ssp. glandulosa
© 2021 Ron Vanderhoff
Arctostaphylos glandulosa ssp. glandulosa
© 2020 Ron Vanderhoff
Arctostaphylos glandulosa ssp. glandulosa
© 2021 Ron Vanderhoff

Arctostaphylos glauca    Big berry manzanita,  Bigberry manzanita
native
Tree, Shrub

ERICACEAE

Arctostaphylos glauca
© 2020 Ron Vanderhoff
Arctostaphylos glauca
© 2018 Ron Vanderhoff
Arctostaphylos glauca
© 2018 Ron Vanderhoff

Arctostaphylos peninsularis    Small Tree-Mallow


Artemisia douglasiana    California mugwort,  Douglas' sagewort
native
Perennial herb

ASTERACEAE

Artemisia douglasiana
© 2022 Ron Vanderhoff
Artemisia douglasiana
© 2016 Glen Schneider
Artemisia douglasiana
© 2021 Mike Russler

Asclepias eriocarpa    Indian milkweed,  Kotolo milkweed,  Woolypod milkweed
native
Perennial herb

APOCYNACEAE

Asclepias eriocarpa
© 2017 Diane Etchison
Asclepias eriocarpa
© 2019 Cliff Halverson
Asclepias eriocarpa
© 2014 Dan Cohn

Asclepias fascicularis    Narrow leaf milkweed
native
Perennial herb

APOCYNACEAE

Asclepias fascicularis
© 2010 Steve Matson
Asclepias fascicularis
© 2010 Steve Matson
Asclepias fascicularis
© 2014 Steve Matson

Aspidotis californica    California lace fern,  California lacefern
native
Fern

PTERIDACEAE

Aspidotis californica
© 2020 R.A. Chasey
Aspidotis californica
© 2018 Hunter Breck
Aspidotis californica
© 2020 John Schmidt

Asplenium vespertinum    Western spleenwort
rare native
Fern

ASPLENIACEAE

Asplenium vespertinum
© 2015 Ron Vanderhoff
Asplenium vespertinum
© 2014 Ron Vanderhoff
Asplenium vespertinum
© 2023 Ron Vanderhoff

Astragalus pomonensis    Pomona milk vetch,  Pomona milkvetch
native
Perennial herb

FABACEAE

Astragalus pomonensis
© 2020 David Greenberger
Astragalus pomonensis
© 2020 Ron Vanderhoff
Astragalus pomonensis
© 2023 Ron Vanderhoff

Athysanus pusillus    Athysanus,  Common sandweed,  Dwarf athysanus
native
Annual herb

BRASSICACEAE

Athysanus pusillus
© 2008 Steve Matson
Athysanus pusillus
© 2008 Steve Matson
Athysanus pusillus
© 2008 Steve Matson

Avena barbata    Slender oat,  Slim oat
invasive non-native
Annual grass

POACEAE

Avena barbata
© 2018 Julian Geoghegan
Avena barbata
© 2023 David popp
Avena barbata
© 2019 Ron Vanderhoff

Avena fatua    Wild oat,  Wildoat
invasive non-native
Annual grass

POACEAE

Avena fatua
© 2018 Gary McDonald
Avena fatua
© 2023 Ron Vanderhoff
Avena fatua
© 2023 Matt Berger

Azolla filiculoides    American water fern, mosquito fern,  Mosquito fern,  Pacific mosquitofern
native
Fern

AZOLLACEAE

Azolla filiculoides
© 2020 Ron Vanderhoff
Azolla filiculoides
© 2023 R.A. Chasey
Azolla filiculoides
© 2021 Zoya Akulova-Barlow

Baccharis emoryi    Willow baccharis
native
Shrub

ASTERACEAE

Baccharis emoryi
© 2020 Ron Vanderhoff
Baccharis emoryi
© 2020 Ron Vanderhoff
Baccharis emoryi
© 2022 Ron Vanderhoff

Baccharis glutinosa    Douglas' baccharis,  Salt marsh baccharis
native
Perennial herb

ASTERACEAE

Baccharis glutinosa
© 2020 Patrick Furtado
Baccharis glutinosa
© 2019 Julian Geoghegan
Baccharis glutinosa
© 2020 Rebecca Schoenenberger

native
Shrub

ASTERACEAE

Baccharis pilularis ssp. consanguinea
© 2009 Toni Corelli
Baccharis pilularis ssp. consanguinea
© 2022 John Doyen
Baccharis pilularis ssp. consanguinea
© 2018 Ron Vanderhoff

Bebbia juncea    Sweetbush
native
Shrub

ASTERACEAE

Bebbia juncea
© 2019 Ron Vanderhoff
Bebbia juncea
© 2023 Julia Markey
Bebbia juncea
© 2023 Julia Markey

Blennosperma nanum    Common stickyseed,  Yellow carpet
native
Annual herb

ASTERACEAE

Blennosperma nanum
© 2022 James Adams
Blennosperma nanum
© 2023 R.A. Chasey
Blennosperma nanum
© 2019 David popp

Bloomeria crocea ssp. crocea    Common goldenstar
native
Perennial herb

THEMIDACEAE

Bloomeria crocea ssp. crocea
© 2019 Michael Mitchell
Bloomeria crocea ssp. crocea
© 2019 Ron Vanderhoff
Bloomeria crocea ssp. crocea
© 2017 Aaron Echols

Boisduvalia densiflora    Dense boisduvalia,  Dense flowered boisduvalia,  Dense flowered spike primrose
native
Annual herb

ONAGRACEAE

Boisduvalia densiflora
© 2009 BOB CASE
Boisduvalia densiflora
© 2021 Mike Russler
Boisduvalia densiflora
© 2020 Bob Sweatt

Bothriochloa barbinodis    Beard grass,  Cane beardgrass,  Cane bluestem
native
Perennial grass

POACEAE

Bothriochloa barbinodis
© 2022 Ron Vanderhoff
Bothriochloa barbinodis
© 2018 Ron Vanderhoff
Bothriochloa barbinodis
© 2015 Ron Vanderhoff

Bowlesia incana    Hoary bowlesia
native
Annual herb

APIACEAE

Bowlesia incana
© 2019 Diane Renshaw
Bowlesia incana
© 2019 Diane Renshaw
Bowlesia incana
© 2017 Gary McDonald

Brassica geniculata    Mediterranean hoary mustard,  Short podded mustard,  Summer mustard
invasive non-native
Perennial herb

BRASSICACEAE

Brassica geniculata
© 2017 Gary McDonald
Brassica geniculata
© 2017 Gary McDonald
Brassica geniculata
© 2022 Ron Vanderhoff

Brassica nigra    Black mustard
invasive non-native
Annual herb

BRASSICACEAE

Brassica nigra
© 2021 Ron Vanderhoff
Brassica nigra
© 2019 Ron Vanderhoff
Brassica nigra
© 2019 Ron Vanderhoff

Brassica rapa ssp. sylvestris    Field mustard,  Turnip
invasive non-native
Annual herb

BRASSICACEAE

Brassica rapa ssp. sylvestris
© 2017 Barbara Boethling
Brassica rapa ssp. sylvestris
© 2017 Cynthia Powell
Brassica rapa ssp. sylvestris
© 2018 Angelique Herman

Brickellia californica    Brickell bush,  California brickellbush,  California brickellia
native
Perennial herb

ASTERACEAE

Brickellia californica
© 2020 Diane Etchison
Brickellia californica
© 2018 Diane Etchison
Brickellia californica
© 2022 Ron Vanderhoff

Brodiaea filifolia    Thread leaved brodiaea,  Threadleaf brodiaea
rare native
Perennial herb (bulb)

THEMIDACEAE

Brodiaea filifolia
© 2019 Diane Etchison
Brodiaea filifolia
© 2019 Diane Etchison
Brodiaea filifolia
© 2021 Ron Vanderhoff

Brodiaea orcuttii    Orcutt's brodiaea
rare native
Perennial herb (bulb)

THEMIDACEAE

Brodiaea orcuttii
© 2023 Caitlin Kreutz
Brodiaea orcuttii
© 2014 Keir Morse
Brodiaea orcuttii
© 2023 Juergen Schrenk

Brodiaea terrestris ssp. kernensis    Kern brodiaea,  Kern dwarf brodiaea
native
Perennial herb

THEMIDACEAE

Brodiaea terrestris ssp. kernensis
© 2019 Diane Etchison
Brodiaea terrestris ssp. kernensis
© 2019 Diane Etchison
Brodiaea terrestris ssp. kernensis
© 2020 Ron Vanderhoff

Bromus arenarius    Australian brome,  Australian chess
non-native
Annual grass

POACEAE

Bromus arenarius
© 2019 Ron Vanderhoff
Bromus arenarius
© 2019 Ron Vanderhoff

Bromus carinatus    California brome
native
Perennial grass

POACEAE

Bromus carinatus
© 2020 Ron Vanderhoff
Bromus carinatus
© 2022 David popp
Bromus carinatus
© 2014 Vertin Alvarez

Bromus diandrus    Bromegrass,  Ripgut brome,  Ripgut grass
invasive non-native
Annual grass

POACEAE

Bromus diandrus
© 2022 Ron Vanderhoff
Bromus diandrus
© 2021 Richard Spjut
Bromus diandrus
© 2022 Ron Vanderhoff

Bromus grandis    Tall brome
native
Perennial grass

POACEAE

Bromus grandis
© 2019 Ron Vanderhoff
Bromus grandis
© 2021 Arlee Montalvo
Bromus grandis
© 2019 Ron Vanderhoff

Bromus mollis    Soft brome,  Soft chess
invasive non-native
Annual grass

POACEAE

Bromus mollis
© 2023 Ron Vanderhoff
Bromus mollis
© 2018 Gary McDonald
Bromus mollis
© 2018 Gary McDonald

Bromus pseudolaevipes    Coast range brome,  Southern chinook brome
native
Perennial grass

POACEAE

Bromus pseudolaevipes
© 2019 Ron Vanderhoff
Bromus pseudolaevipes
© 2019 Ron Vanderhoff
Bromus pseudolaevipes
© 2019 Ron Vanderhoff

Bromus rubens    Red brome
invasive non-native
Annual grass

POACEAE

Bromus rubens
© 2015 Chris Jaster
Bromus rubens
© 2015 jamie smith
Bromus rubens
© 2018 Gary McDonald

Bromus tectorum    Cheatgrass, downy brome,  Downy brome grass,  Downy chess
invasive non-native
Annual grass

POACEAE

Bromus tectorum
© 2022 Ron Vanderhoff
Bromus tectorum
© 2022 Ron Vanderhoff
Bromus tectorum
© 2022 Ron Vanderhoff

Calandrinia ciliata var. menziesii    red maids,  Calandrinia
native
Annual herb

MONTIACEAE

Calandrinia ciliata var. menziesii
© 2021 Mary Ann Machi
Calandrinia ciliata var. menziesii
© 2019 Ron Vanderhoff
Calandrinia ciliata var. menziesii
© 2019 Ron Vanderhoff

Callitriche heterophylla ssp. bolanderi    Bolander's water starwort
native
Annual herb

PLANTAGINACEAE

Callitriche heterophylla ssp. bolanderi
© 2023 R.A. Chasey
Callitriche heterophylla ssp. bolanderi
© 2007 Keir Morse
Callitriche heterophylla ssp. bolanderi
© 2023 R.A. Chasey

Callitriche longipedunculata    Longstock water-starwort
native
Perennial herb

PLANTAGINACEAE


Callitriche marginata    California water starwort,  Winged water starwort
native
Annual herb (aquatic)

PLANTAGINACEAE

Callitriche marginata
© 2019 Ron Vanderhoff
Callitriche marginata
© 2019 Ron Vanderhoff
Callitriche marginata
© 2019 Ron Vanderhoff

Calochortus albus    White fairy lantern,  White globe lily
native
Perennial herb

LILIACEAE

Calochortus albus
© 2019 David Greenberger
Calochortus albus
© 2019 Cynthia Powell
Calochortus albus
© 2016 Steve Matson

Calochortus splendens    Splendid mariposa lily
native
Perennial herb

LILIACEAE

Calochortus splendens
© 2019 Gordon Jenkins
Calochortus splendens
© 2024 Ken-ichi Ueda
Calochortus splendens
© 2019 Ron Vanderhoff

Calochortus weedii    Weed's mariposa lily
native
Perennial herb

LILIACEAE

Calochortus weedii
© 2019 Diane Etchison
Calochortus weedii
© 2019 Bonnie Nickel
Calochortus weedii
© 2020 Mary Wloch

Calycadenia tenella    False rosinweed,  Osmadenia
native
Annual herb

ASTERACEAE

Calycadenia tenella
© 2019 Diane Etchison
Calycadenia tenella
© 2018 Diane Etchison
Calycadenia tenella
© 2021 Ron Vanderhoff

Calyptridium monandrum    Common pussypaws,  Pussy paws
native
Annual herb

MONTIACEAE

Calyptridium monandrum
© 2019 Stacie Wolny
Calyptridium monandrum
© 2023 Maisie Borg
Calyptridium monandrum
© 2021 Mike Russler

Calystegia macrostegia ssp. arida    Island false bindweed,  Southern california morning glory
native
Perennial herb, Vine

CONVOLVULACEAE

Calystegia macrostegia ssp. arida
© 2020 Kimberly Coates
Calystegia macrostegia ssp. arida
© 2020 Mary Wloch
Calystegia macrostegia ssp. arida
© 2021 Emily Sluiman

Camissonia bistorta    California sun cup
native
Annual herb

ONAGRACEAE

Camissonia bistorta
© 2017 Diane Etchison
Camissonia bistorta
© 2019 Ken Hickman
Camissonia bistorta
© 2019 Ken Hickman

Camissonia californica    California primrose
native
Annual herb

ONAGRACEAE

Camissonia californica
© 2019 Elexis Padron
Camissonia californica
© 2019 Ron Vanderhoff
Camissonia californica
© 2019 Elexis Padron

Camissonia hirtella    Hairy sun cup
native
Annual herb

ONAGRACEAE

Camissonia hirtella
© 2019 Steve Matson
Camissonia hirtella
© 2019 Steve Matson
Camissonia hirtella
© 2019 Steve Matson

Camissonia ignota    Jurupa hills sun cup
native
Annual herb

ONAGRACEAE

Camissonia ignota
© 2020 Diane Etchison
Camissonia ignota
© 2015 Diane Etchison
Camissonia ignota
© 2019 Arlee Montalvo

Camissonia micrantha    Spencer primrose
native
Annual herb

ONAGRACEAE

Camissonia micrantha
© 2024 Mike Russler
Camissonia micrantha
© 2021 Cara Wilcox
Camissonia micrantha
© 2023 Ron Vanderhoff

Capsella bursa-pastoris    Shepherd's purse
non-native
Annual herb

BRASSICACEAE

Capsella bursa-pastoris
© 2008 Steve Matson
Capsella bursa-pastoris
© 2019 Cynthia Powell
Capsella bursa-pastoris
© 2022 Doug Allshouse

Cardamine californica    California toothwort,  milkmaids
native
Perennial herb

BRASSICACEAE

Cardamine californica
© 2020 Barbara Peck
Cardamine californica
© 2019 Ron Vanderhoff
Cardamine californica
© 2019 Ron Vanderhoff

Carex alma    Sedge,  Sturdy sedge
native
Perennial grasslike herb

CYPERACEAE

Carex alma
© 2018 Ron Vanderhoff
Carex alma
© 2018 Ron Vanderhoff
Carex alma
© 2011 Dylan Neubauer

Carex barbarae    Santa barbara sedge,  Valley sedge
native
Perennial grasslike herb

CYPERACEAE

Carex barbarae
© 2024 R.A. Chasey
Carex barbarae
© 2023 Ron Vanderhoff
Carex barbarae
© 2023 Ron Vanderhoff

Carex densa    Dense sedge,  Sedge
native
Perennial grasslike herb

CYPERACEAE

Carex densa
© 2023 John Rawlings
Carex densa
© 2022 R.A. Chasey
Carex densa
© 2014 Eric Wrubel

Carex praegracilis    Clustered field sedge,  Field sedge
native
Perennial grasslike herb

CYPERACEAE

Carex praegracilis
© 2020 Ken Hickman
Carex praegracilis
© 2020 John Rawlings
Carex praegracilis
© 2020 Steve Matson

Carex schottii    Schott's sedge
native
Perennial grasslike herb

CYPERACEAE

Carex schottii
© 2019 Ken Hickman
Carex schottii
© 2019 John Rawlings
Carex schottii
© 2019 Ken Hickman

Carex senta    Rough sedge,  Swamp carex,  Swamp sedge
native
Perennial grasslike herb

CYPERACEAE

Carex senta
© 2019 Rachelle Gray
Carex senta
© 2019 Rachelle Gray
Carex senta
© 2019 Rachelle Gray

Carex triquetra    Triangular fruit sedge,  Triangularfruit sedge
native
Perennial grasslike herb

CYPERACEAE

Carex triquetra
© 2009 Adonis (Don) Tate
Carex triquetra
© 2015 Diane Etchison
Carex triquetra
© 2003 Steve Matson

Castilleja affinis ssp. affinis    Coast indian paintbrush
native
Perennial herb

OROBANCHACEAE

Castilleja affinis ssp. affinis
© 2006 Steve Matson
Castilleja affinis ssp. affinis
© 2006 Steve Matson
Castilleja affinis ssp. affinis
© 2019 Ron Vanderhoff

Castilleja foliolosa    Texas paintbrush,  Woolly indian paintbrush
native
Perennial herb

OROBANCHACEAE

Castilleja foliolosa
© 2019 Ron Vanderhoff
Castilleja foliolosa
© 2019 Diane Etchison
Castilleja foliolosa
© 2019 Diane Etchison

Castilleja stenantha    Lesser indian paintbrush,  Lesser paintbrush
native
Annual herb

OROBANCHACEAE

Castilleja stenantha
© 2023 Rhonda Allen
Castilleja stenantha
© 2019 Ron Vanderhoff
Castilleja stenantha
© 2019 Matt Berger

Ceanothus crassifolius    Hoary leaved ceanothus,  Hoaryleaf ceanothus
native
Shrub

RHAMNACEAE

Ceanothus crassifolius
© 2021 Dave Beller
Ceanothus crassifolius
© 2018 Aaron Echols
Ceanothus crassifolius
© 2020 Bryant Baker

Ceanothus leucodermis    Chaparral whitethorn
native
Shrub

RHAMNACEAE

Ceanothus leucodermis
© 2020 Bryant Baker
Ceanothus leucodermis
© 2019 Ron Vanderhoff
Ceanothus leucodermis
© 2019 Bryant Baker

Ceanothus tomentosus ssp. olivaceus    Woolly leaf ceanothus,  Woolyleaf ceanothus
native
Shrub

RHAMNACEAE

Ceanothus tomentosus ssp. olivaceus
© 2019 Diane Etchison
Ceanothus tomentosus ssp. olivaceus
© 2022 Ron Vanderhoff
Ceanothus tomentosus ssp. olivaceus
© 2019 Ron Vanderhoff

Centaurea melitensis    Maltese star thistle,  Napa star thistle,  Tocalote
invasive non-native
Annual herb

ASTERACEAE

Centaurea melitensis
© 2019 Ron Vanderhoff
Centaurea melitensis
© 2020 Ron Vanderhoff
Centaurea melitensis
© 2020 Laura Anna Arellano

Centaurium venustum    California Centaury, Charming Centaury
native
Annual herb

GENTIANACEAE

Centaurium venustum
© 2019 Diane Etchison
Centaurium venustum
© 2021 Bonnie Nickel
Centaurium venustum
© 2019 Diane Etchison

Cerastium glomeratum var. apetalum    Large mouse ears,  Mouseear chickweed,  Sticky chickweed
non-native
Annual herb

CARYOPHYLLACEAE

Cerastium glomeratum var. apetalum
© 2024 Dana York
Cerastium glomeratum var. apetalum
© 2023 Ron Vanderhoff
Cerastium glomeratum var. apetalum
© 2023 R.A. Chasey

Cercocarpus betuloides ssp. betuloides    Birch leaf mountain mahogany
native
Tree, Shrub

ROSACEAE

Cercocarpus betuloides ssp. betuloides
© 2019 Ron Vanderhoff
Cercocarpus betuloides ssp. betuloides
© 2019 Ron Vanderhoff
Cercocarpus betuloides ssp. betuloides
© 2016 Ron Vanderhoff

Cercocarpus minutiflorus    Smooth mountain mahogany
native
Shrub

ROSACEAE

Cercocarpus minutiflorus
© 2012 Ron Vanderhoff
Cercocarpus minutiflorus
© 2020 Ron Vanderhoff
Cercocarpus minutiflorus
© 2020 Ron Vanderhoff

Chaenactis artemisiaefolia    Artemisia leaved chaenactis,  White pincushion
native
Annual herb

ASTERACEAE

Chaenactis artemisiaefolia
© 2022 Rosalind Helfand
Chaenactis artemisiaefolia
© 2023 Julia Markey
Chaenactis artemisiaefolia
© 2022 Ron Vanderhoff

Chaenactis glabriuscula    Common yellow chaenactis,  Yellow pincushion
native
Annual herb

ASTERACEAE

Chaenactis glabriuscula
© 2019 Marisa Persaud
Chaenactis glabriuscula
© 2016 Steve Matson
Chaenactis glabriuscula
© 2019 Marisa Persaud

Chamaesyce albomarginata    Rattlesnake sandmat
native
Perennial herb

EUPHORBIACEAE

Chamaesyce albomarginata
© 2019 Diane Etchison
Chamaesyce albomarginata
© 2019 Cynthia Powell
Chamaesyce albomarginata
© 2019 Douglas Gordon-Blackwood

Chamaesyce polycarpa var. polycarpa    Smallseed sandmat
native
Perennial herb

EUPHORBIACEAE

Chamaesyce polycarpa var. polycarpa
© 2018 Ron Vanderhoff
Chamaesyce polycarpa var. polycarpa
© 2010 Steve Matson
Chamaesyce polycarpa var. polycarpa
© 2021 Les Vion

Chamaesyce serpyllifolia    Thyme-leafed spurge
native
Annual herb

EUPHORBIACEAE

Chamaesyce serpyllifolia
© 2022 Steve Matson
Chamaesyce serpyllifolia
© 2022 Steve Matson
Chamaesyce serpyllifolia
© 2005 Steve Matson

Chamaesyce supina    Spotted spurge
non-native
Annual herb

EUPHORBIACEAE

Chamaesyce supina
© 2019 B.J. Dion
Chamaesyce supina
© 2019 B.J. Dion
Chamaesyce supina
© 2022 Ron Vanderhoff

Chenopodium album    Lamb's quarters,  Lambs quarters,  White goosefoot
non-native
Annual herb

CHENOPODIACEAE

Chenopodium album
© 2022 Ron Vanderhoff
Chenopodium album
© 2014 Toni Corelli
Chenopodium album
© 2022 Ron Vanderhoff

Chenopodium ambrosioides    Mexican tea
non-native
Annual, Perennial herb

CHENOPODIACEAE

Chenopodium ambrosioides
© 2020 Ron Vanderhoff
Chenopodium ambrosioides
© 2018 Ron Vanderhoff
Chenopodium ambrosioides
© 2020 Ron Vanderhoff

Chenopodium berlandieri var. sinuatum    Pitseed goosefoot
native
Annual herb

CHENOPODIACEAE

Chenopodium berlandieri var. sinuatum
© 2014 Ron Vanderhoff
Chenopodium berlandieri var. sinuatum
© 2023 Dianne Lake
Chenopodium berlandieri var. sinuatum
© 2018 Ron Vanderhoff

Chenopodium californicum    California goosefoot,  Pigweed,  Soaproot
native
Perennial herb

CHENOPODIACEAE

Chenopodium californicum
© 2023 Mike Russler
Chenopodium californicum
© 2023 Mike Russler
Chenopodium californicum
© 2023 Mike Russler

Chenopodium murale    Nettle leaf goosefoot,  Sowbane
non-native
Annual herb

CHENOPODIACEAE

Chenopodium murale
© 2020 Ron Vanderhoff
Chenopodium murale
© 2019 Diane Etchison
Chenopodium murale
© 2020 Ron Vanderhoff

Chenopodium pumilio    Tasmanian goosefoot
non-native
Annual herb

CHENOPODIACEAE

Chenopodium pumilio
© 2018 Ron Vanderhoff
Chenopodium pumilio
© 2019 Ron Vanderhoff
Chenopodium pumilio
© 2018 Ron Vanderhoff

native
Perennial herb

AGAVACEAE

Chlorogalum parviflorum
© 2022 Scott Henry
Chlorogalum parviflorum
© 2014 Diane Etchison
Chlorogalum parviflorum
© 2014 Diane Etchison

Chlorogalum pomeridianum    Amole,  Soap plant,  Soaproot
native
Perennial herb

AGAVACEAE

Chlorogalum pomeridianum
© 2019 Patrick Furtado
Chlorogalum pomeridianum
© 2020 Robert Katz
Chlorogalum pomeridianum
© 2019 Diane Etchison

Chorizanthe fimbriata    Fringed spineflower
native
Annual herb

POLYGONACEAE

Chorizanthe fimbriata
© 2019 Matt Berger
Chorizanthe fimbriata
© 2020 Ron Vanderhoff
Chorizanthe fimbriata
© 2019 Ron Vanderhoff

Chorizanthe polygonoides ssp. longispina    Knotweed spineflower,  Long spined spineflower
rare native
Annual herb

POLYGONACEAE

Chorizanthe polygonoides ssp. longispina
© 2023 Aaron Echols
Chorizanthe polygonoides ssp. longispina
© 2023 Aaron Echols
Chorizanthe polygonoides ssp. longispina
© 2023 Aaron Echols

Chorizanthe procumbens    Prostrate spineflower
native
Annual herb

POLYGONACEAE

Chorizanthe procumbens
© 2019 Diane Etchison
Chorizanthe procumbens
© 2023 Ron Vanderhoff
Chorizanthe procumbens
© 2023 Ron Vanderhoff

native
Annual herb

POLYGONACEAE

Chorizanthe staticoides ssp. foliosum
© 2019 Ron Vanderhoff
Chorizanthe staticoides ssp. foliosum
© 2019 Bryant Baker
Chorizanthe staticoides ssp. foliosum
© 2019 Ron Vanderhoff

Chrysanthemum coronarium    Crown daisy
invasive non-native
Annual herb

ASTERACEAE

Chrysanthemum coronarium
© 2019 Nicole Leatherman
Chrysanthemum coronarium
© 2018 Rachelle Gray
Chrysanthemum coronarium
© 2022 Jennifer Mo

Cirsium californicum    Bigelow thistle,  California thistle,  Cobwebby thistle
native
Perennial herb

ASTERACEAE

Cirsium californicum
© 2021 Amber Bedgood
Cirsium californicum
© 2021 Mike Russler
Cirsium californicum
© 2013 James Gonsman

Cirsium occidentale    Cobweb thistle,  Western thistle
native
Perennial herb

ASTERACEAE

Cirsium occidentale
© 2011 Steve Matson
Cirsium occidentale
© 2011 Steve Matson
Cirsium occidentale
© 2011 Steve Matson

Cirsium tioganum    Dwarf thistle,  Elk thistle
native
Perennial herb

ASTERACEAE

Cirsium tioganum
© 2020 Bob Sweatt
Cirsium tioganum
© 2022 Melissa Harbert
Cirsium tioganum
© 2023 Ryan O'Dell

Cirsium vulgare    Bull thistle
invasive non-native
Perennial herb

ASTERACEAE

Cirsium vulgare
© 2017 James Bailey
Cirsium vulgare
© 2020 Bob Sweatt
Cirsium vulgare
© 2020 Bob Sweatt

Clarkia dudleyana    Dudley's clarkia
native
Annual herb

ONAGRACEAE

Clarkia dudleyana
© 2018 Steve Matson
Clarkia dudleyana
© 2018 Steve Matson
Clarkia dudleyana
© 2018 Steve Matson

Clarkia epilobioides    Canyon clarkia,  Willow herb clarkia
native
Annual herb

ONAGRACEAE

Clarkia epilobioides
© 2017 Steve Matson
Clarkia epilobioides
© 2017 Steve Matson
Clarkia epilobioides
© 2017 Steve Matson

Clarkia purpurea ssp. quadrivulnera    Four-spot,  Purple clarkia,  Purple godetia
native
Annual herb

ONAGRACEAE

Clarkia purpurea ssp. quadrivulnera
© 2014 Steve Matson
Clarkia purpurea ssp. quadrivulnera
© 2019 Joe Engelbrecht
Clarkia purpurea ssp. quadrivulnera
© 2021 R.A. Chasey

Claytonia perfoliata    Miners lettuce,  Miner's lettuce,  Rooreh (Ohlone)
native
Annual herb

MONTIACEAE

Claytonia perfoliata
© 2008 Steve Matson
Claytonia perfoliata
© 2019 Gary McDonald
Claytonia perfoliata
© 2020 Ron Vanderhoff

Clematis lasiantha    Chaparral clematis,  Pipestem
native
Perennial herb, Vine

RANUNCULACEAE

Clematis lasiantha
© 2008 Steve Matson
Clematis lasiantha
© 2018 Steve Matson
Clematis lasiantha
© 2018 Steve Matson

Clematis pauciflora    Few flowered clematis,  Hill clematis,  Ropevine clematis
native
Perennial herb, Vine

RANUNCULACEAE

Clematis pauciflora
© 2015 Diane Etchison
Clematis pauciflora
© 2019 Ron Vanderhoff
Clematis pauciflora
© 2019 Diane Etchison

Collinsia concolor    Southern Chinese houses
native
Annual herb

PLANTAGINACEAE

Collinsia concolor
© 2020 Julie Ann Watson
Collinsia concolor
© 2024 Erin Bergman
Collinsia concolor
© 2024 Erin Bergman

Collinsia heterophylla    Purple chinese houses
native
Annual herb

PLANTAGINACEAE

Collinsia heterophylla
© 2022 Mary Ann Machi
Collinsia heterophylla
© 2019 David Greenberger
Collinsia heterophylla
© 2019 Ron Vanderhoff

Collinsia parryi    Parry's blue eyed mary,  Parry's collinsia
native
Annual herb

PLANTAGINACEAE

Collinsia parryi
© 2019 Ron Vanderhoff
Collinsia parryi
© 2016 Ron Vanderhoff
Collinsia parryi
© 2015 Ron Vanderhoff

Convolvulus arvensis    Field bindweed,  Orchard morningglory
invasive non-native
Perennial herb, Vine

CONVOLVULACEAE

Convolvulus arvensis
© 2022 Steve Matson
Convolvulus arvensis
© 2021 Ron Vanderhoff
Convolvulus arvensis
© 2022 Steve Matson

Conyza bonariensis    Flax-leaved horseweed
non-native
Annual herb

ASTERACEAE

Conyza bonariensis
© 2021 Donald Burk
Conyza bonariensis
© 2017 Gary McDonald
Conyza bonariensis
© 2023 Ron Vanderhoff

Conyza canadensis    Canada horseweed
native
Annual herb

ASTERACEAE

Conyza canadensis
© 2017 Gary McDonald
Conyza canadensis
© 2017 Gary McDonald
Conyza canadensis
© 2022 Mike Russler

Conyza coulteri    Coulter's horseweed
native
Annual herb

ASTERACEAE

Conyza coulteri
© 2012 Steve Matson
Conyza coulteri
© 2012 Steve Matson
Conyza coulteri
© 2012 Steve Matson

Cordylanthus filifolius    Bristly Bird's Beak
native
Annual herb (hemiparasitic)

OROBANCHACEAE

Cordylanthus filifolius
© 2023 Ron Vanderhoff
Cordylanthus filifolius
© 2021 Ron Vanderhoff
Cordylanthus filifolius
© 2003 Dr. Kenneth L. Bowles

Corethrogyne filaginifolia    Common sandaster
native
Perennial herb

ASTERACEAE

Corethrogyne filaginifolia
© 2022 Mike Russler
Corethrogyne filaginifolia
© 2018 Ron Vanderhoff
Corethrogyne filaginifolia
© 2019 Diane Etchison

Cortaderia atacamensis    Pampas grass,  Purple pampas grass
invasive non-native
Perennial grass

POACEAE

Cortaderia atacamensis
© 2018 Ramona Robison
Cortaderia atacamensis
© 2021 Michelle Karle
Cortaderia atacamensis
© 2022 Michelle Karle

Cotula australis    Australian brass buttons,  Australian cotula,  Australian waterbuttons
non-native
Annual herb

ASTERACEAE

Cotula australis
© 2023 Mike Russler
Cotula australis
© 2022 Ron Vanderhoff
Cotula australis
© 2023 Mike Russler

Crassula aquatica    Aquatic pygmy weed,  Pigmy weed,  Water pygmyweed
native
Annual herb

CRASSULACEAE

Crassula aquatica
© 2019 Ron Vanderhoff
Crassula aquatica
© 2022 Ken-ichi Ueda
Crassula aquatica
© 2022 Catherine Chang

Crassula erecta    Pigmy weed,  Sand pygmy weed,  Sand pygmyweed
native
Annual herb

CRASSULACEAE

Crassula erecta
© 2020 Ron Vanderhoff
Crassula erecta
© 2019 Ron Vanderhoff
Crassula erecta
© 2019 Ron Vanderhoff

Cryptantha intermedia    Clearwater cryptantha,  Common cryptantha
native
Annual herb

BORAGINACEAE

Cryptantha intermedia
© 2020 Ron Vanderhoff
Cryptantha intermedia
© 2019 Ron Vanderhoff
Cryptantha intermedia
© 2019 Ron Vanderhoff

Cryptantha microstachys    Popcorn flower,  Tejon cryptantha
native
Annual herb

BORAGINACEAE

Cryptantha microstachys
© 2019 Diane Etchison
Cryptantha microstachys
© 2018 Ron Vanderhoff
Cryptantha microstachys
© 2017 Diane Etchison

Cryptantha muricata    Pointed cryptantha,  Prickly cryptantha,  Prickly popcorn flower
native
Annual herb

BORAGINACEAE

Cryptantha muricata
© 2021 R.A. Chasey
Cryptantha muricata
© 2019 Marisa Persaud
Cryptantha muricata
© 2019 Marisa Persaud

Cucurbita foetidissima    Calabazilla,  Missouri gourd,  Mock orange
native
Perennial herb, Vine

CUCURBITACEAE

Cucurbita foetidissima
© 2014 Steve Matson
Cucurbita foetidissima
© 2014 Steve Matson
Cucurbita foetidissima
© 2021 Ron Vanderhoff

Cuscuta californica    California dodder,  Chaparral dodder
native
Annual herb, Vine (parasitic)

CONVOLVULACEAE

Cuscuta californica
© 2019 Ron Vanderhoff
Cuscuta californica
© 2018 David popp
Cuscuta californica
© 2019 stephen rosenthal

Cuscuta ceanothi    Canyon dodder
native
Annual herb, Vine (parasitic)

CONVOLVULACEAE

Cuscuta ceanothi
© 2018 Ron Vanderhoff
Cuscuta ceanothi
© 2020 Ron Vanderhoff
Cuscuta ceanothi
© 2018 Ron Vanderhoff

Cynodon dactylon    Bermuda grass,  Bermudagrass
invasive non-native
Perennial grass

POACEAE

Cynodon dactylon
© 2021 Ron Vanderhoff
Cynodon dactylon
© 2020 Ron Vanderhoff
Cynodon dactylon
© 2021 Ron Vanderhoff

Cyperus alternifolius    Umbrella plant,  Unbrella plant
non-native
Perennial grasslike herb

CYPERACEAE

Cyperus alternifolius
© 2018 Rachelle Gray
Cyperus alternifolius
© 2020 Martin Lemon
Cyperus alternifolius
© 2018 Jennifer Mo

Cyperus eragrostis    Tall cyperus,  Tall flatsedge
native
Perennial grasslike herb

CYPERACEAE

Cyperus eragrostis
© 2016 Joan Hampton
Cyperus eragrostis
© 2021 Ken Lunders
Cyperus eragrostis
© 2014 James Gonsman

Cyperus esculentus    Chufa flatsedge,  Nut grass,  Yellow nutgrass
native
Perennial grasslike herb

CYPERACEAE

Cyperus esculentus
© 2020 Ron Vanderhoff
Cyperus esculentus
© 2015 Gerald Carr
Cyperus esculentus
© 2019 Ron Vanderhoff

Datisca glomerata    Durango root
native
Perennial herb

DATISCACEAE

Datisca glomerata
© 2019 Ron Vanderhoff
Datisca glomerata
© 2019 Diane Etchison
Datisca glomerata
© 2019 Matt Berger

Datura wrightii    Jimsonweed,  Sacred thorn apple,  Toluaca
native
Perennial herb

SOLANACEAE

Datura wrightii
© 2017 Lisa Miller
Datura wrightii
© 2019 Ron Vanderhoff
Datura wrightii
© 2020 Mike McNamara

Daucus pusillus    American wild carrot,  Rattlesnake weed
native
Annual herb

APIACEAE

Daucus pusillus
© 2019 Diane Etchison
Daucus pusillus
© 2022 David Wolfson
Daucus pusillus
© 2021 Ken Lunders

Delphinium cardinale    Scarlet larkspur
native
Perennial herb

RANUNCULACEAE

Delphinium cardinale
© Geoff Burleigh
Delphinium cardinale
© 2021 Colin Barrows
Delphinium cardinale
© 2018 Mike Libby

Delphinium parryi    San bernardino larkspur
native
Perennial herb

RANUNCULACEAE

Delphinium parryi
© 2019 Diane Etchison
Delphinium parryi
© Geoff Burleigh
Delphinium parryi
© 2019 Diane Etchison

Dendromecon rigida ssp. rigida    Bush poppy,  Tree poppy
native
Shrub

PAPAVERACEAE

Dendromecon rigida ssp. rigida
© 2019 Eliezer Margolis
Dendromecon rigida ssp. rigida
© 2018 Hunter Breck
Dendromecon rigida ssp. rigida
© 2010 Suzanne L. Weakley

native
Annual grass

POACEAE

Deschampsia danthonioides var. gracilis
© 2003 Steve Matson
Deschampsia danthonioides var. gracilis
© 2003 Steve Matson
Deschampsia danthonioides var. gracilis
© 2018 Emily Allen

Dicentra chrysantha    Golden eardrops
native
Perennial herb

PAPAVERACEAE

Dicentra chrysantha
© 2019 David Greenberger
Dicentra chrysantha
© 2020 Bryant Baker
Dicentra chrysantha
© 2019 Ron Vanderhoff

Dichelostemma pulchellum    Blue dicks
native
Perennial herb

THEMIDACEAE

Dichelostemma pulchellum
© 2023 Steve Matson
Dichelostemma pulchellum
© 2023 Steve Matson
Dichelostemma pulchellum
© 2022 Steve Matson

Digitaria sanguinalis    Hairy crabgrass
non-native
Annual grass

POACEAE

Digitaria sanguinalis
© 2022 Ron Vanderhoff
Digitaria sanguinalis
© 2022 Ron Vanderhoff
Digitaria sanguinalis
© 2019 Jennifer Mo

Diplacus aurantiacus ssp. australis    Southern monkeyflower
native
Shrub

PHRYMACEAE

Diplacus aurantiacus ssp. australis
© 2021 Bonnie Nickel
Diplacus aurantiacus ssp. australis
© 2020 Ron Vanderhoff
Diplacus aurantiacus ssp. australis
© 2020 Ron Vanderhoff

Distichlis spicata ssp. stricta    Inland saltgrass,  Salt grass,  Saltgrass
native
Perennial grass

POACEAE

Distichlis spicata ssp. stricta
© 2020 Matt Berger
Distichlis spicata ssp. stricta
© 2019 Ron Vanderhoff
Distichlis spicata ssp. stricta
© 2022 Donald Burk

Dodecatheon clevelandii ssp. clevelandii    Cleveland's shooting star
native
Perennial herb

PRIMULACEAE

Dodecatheon clevelandii ssp. clevelandii
© 2019 Ron Vanderhoff
Dodecatheon clevelandii ssp. clevelandii
© 2015 Rob O'Keefe
Dodecatheon clevelandii ssp. clevelandii
© 2021 Ron Vanderhoff

Downingia bella    Hoover's calicoflower,  Hoover's downingia
native
Annual herb

CAMPANULACEAE

Downingia bella
© 2017 Ray Gill
Downingia bella
© 2023 Emily Sluiman
Downingia bella
© 2019 Diane Etchison

Downingia cuspidata    Toothed calicoflower,  Toothed downingia
native
Annual herb

CAMPANULACEAE

Downingia cuspidata
© 2019 Steve Matson
Downingia cuspidata
© 2019 Steve Matson
Downingia cuspidata
© 2019 Steve Matson

Dryopteris arguta    California wood fern,  Coastal wood fern,  Shield fern
native
Fern

DRYOPTERIDACEAE

Dryopteris arguta
© 2018 James Gonsman
Dryopteris arguta
© 2019 Rebecca Crowe
Dryopteris arguta
© 2023 Julia Markey

Dudleya edulis    Fingertips
native
Perennial herb

CRASSULACEAE

Dudleya edulis
© 2020 Ron Vanderhoff
Dudleya edulis
© 2018 Diane Etchison
Dudleya edulis
© 2009 Ron Vanderhoff

Dudleya lanceolata    Lanceleaf liveforever,  Southern california dudleya
native
Perennial herb

CRASSULACEAE

Dudleya lanceolata
© 2019 Ron Vanderhoff
Dudleya lanceolata
© 2020 Steven M Norris
Dudleya lanceolata
© 2020 Steven M Norris

Dudleya pulverulenta    Chalk dudleya
native
Perennial herb

CRASSULACEAE

Dudleya pulverulenta
© 2018 Ron Vanderhoff
Dudleya pulverulenta
© 2012 Ann Dalkey
Dudleya pulverulenta
© 2020 Julia Markey

Echinochloa colonum    Small Tree-Mallow


Echinochloa crus-galli    Barnyard grass,  Japanese millet,  Watergrass
non-native
Annual grass

POACEAE

Echinochloa crus-galli
© 2016 Barbara Boethling
Echinochloa crus-galli
© 2022 R.A. Chasey
Echinochloa crus-galli
© 2008 Zoya Akulova

Echium plantagineum    Salvation echium,  Salvation jane,  Viper's bugloss
invasive non-native
Annual, Perennial herb

BORAGINACEAE

Echium plantagineum
© 2020 John Rawlings
Echium plantagineum
© 2019 Ken Hickman
Echium plantagineum
© 2011 Daniel Gluesenkamp

Elatine brachysperma    Short seed waterwort,  Shortseed waterwort
native
Annual, Perennial herb

ELATINACEAE

Elatine brachysperma
© 2023 Ron Vanderhoff
Elatine brachysperma
© 2023 Ron Vanderhoff
Elatine brachysperma
© 2023 Ron Vanderhoff

Elatine californica    California waterwort
native
Annual, Perennial herb

ELATINACEAE

Elatine californica
© 2023 Keir Morse
Elatine californica
© Mary Ann Hannon
Elatine californica
© 2015 Vernon Smith

Elatine chilensis    Chilean waterwort
native
Annual, Perennial herb (aquatic)

ELATINACEAE

Elatine chilensis
© 2012 Keir Morse
Elatine chilensis
© 2012 Keir Morse
Elatine chilensis
© 2012 Keir Morse

Eleocharis acicularis    Needle spike rush,  Needle spikerush
native
Perennial grasslike herb

CYPERACEAE

Eleocharis acicularis
© 2022 Ken-ichi Ueda
Eleocharis acicularis
© 2021 Ron Vanderhoff
Eleocharis acicularis
© 2019 Julia King

Eleocharis macrostachya    Common spikerush,  Creeping spike rush,  Pale spikerush
native
Perennial grasslike herb

CYPERACEAE

Eleocharis macrostachya
© 2023 Ron Vanderhoff
Eleocharis macrostachya
© 2023 Ron Vanderhoff
Eleocharis macrostachya
© 2003 Steve Matson

Eleocharis montevidensis var. parishii    Parish's spike rush,  Parish's spikerush
native
Perennial grasslike herb

CYPERACEAE

Eleocharis montevidensis var. parishii
© 2014 Steve Matson
Eleocharis montevidensis var. parishii
© 2014 Steve Matson
Eleocharis montevidensis var. parishii
© 2018 Rachelle Gray

Elymus condensatus    Giant wild rye
native
Perennial grass

POACEAE

Elymus condensatus
© 2020 Ron Vanderhoff
Elymus condensatus
© 2022 John Rawlings
Elymus condensatus
© 2020 Diane Etchison

Elymus glaucus ssp. glaucus    Blue wild rye,  Blue wildrye,  Western rye grass
native
Perennial grass

POACEAE

Elymus glaucus ssp. glaucus
© 2014 Toni Corelli
Elymus glaucus ssp. glaucus
© 2021 Arlee Montalvo
Elymus glaucus ssp. glaucus
© 2022 Ron Vanderhoff

Elymus triticoides    Beardless wild rye
native
Perennial grass

POACEAE

Elymus triticoides
© 2018 Ron Vanderhoff
Elymus triticoides
© 2021 Ron Vanderhoff
Elymus triticoides
© 2018 Rachelle Gray

Elymus Xmacounii    Small Tree-Mallow


Emmenanthe penduliflora    Whispering bells,  Whisperingbells
native
Annual herb

HYDROPHYLLACEAE

Emmenanthe penduliflora
© 2022 Steve Matson
Emmenanthe penduliflora
© 2022 Steve Matson
Emmenanthe penduliflora
© 2022 Steve Matson

Encelia farinosa    Brittlebush,  Goldenhills,  Incienso
native
Shrub

ASTERACEAE

Encelia farinosa
© 2020 Ron Vanderhoff
Encelia farinosa
© 2016 Steve Matson
Encelia farinosa
© 2022 Ron Vanderhoff

Epilobium canum ssp. mexicanum    California fuchsia,  Hummingbird trumpet
native
Perennial herb

ONAGRACEAE

Epilobium canum ssp. mexicanum
© 2018 Ron Vanderhoff
Epilobium canum ssp. mexicanum
© 2018 Ron Vanderhoff
Epilobium canum ssp. mexicanum
© 2018 Ron Vanderhoff

Epilobium ciliatum ssp. ciliatum    Fringed willowherb,  Northern willow herb,  Willow herb
native
Perennial herb

ONAGRACEAE

Epilobium ciliatum ssp. ciliatum
© 2014 Steve Matson
Epilobium ciliatum ssp. ciliatum
© 2014 Steve Matson
Epilobium ciliatum ssp. ciliatum
© 2014 Steve Matson

Equisetum arvense    Common horsetail rush,  Common horsetail, field horsetail,  Field horsetail
native
Fern

EQUISETACEAE

Equisetum arvense
© 2022 Suzanne L. Weakley
Equisetum arvense
© 2021 Cynthia Powell
Equisetum arvense
© 2016 Cynthia Powell

Equisetum laevigatum    Horsetail,  Smooth horsetail,  Smooth scouring rush
native
Fern

EQUISETACEAE

Equisetum laevigatum
© 2020 Ron Vanderhoff
Equisetum laevigatum
© 2021 Ron Vanderhoff
Equisetum laevigatum
© 2021 Richard Spjut

Equisetum telmateia    Giant horsetail
native
Fern

EQUISETACEAE

Equisetum telmateia
© 2021 Jennifer Mo
Equisetum telmateia
© 2023 Ron Vanderhoff
Equisetum telmateia
© 2022 Mary Conway

Eragrostis mexicana ssp. virescens    Mexican lovegrass,  Orcutt's eragrostis
native
Annual grass

POACEAE

Eragrostis mexicana ssp. virescens
© 2022 Ron Vanderhoff
Eragrostis mexicana ssp. virescens
© 2022 Ron Vanderhoff
Eragrostis mexicana ssp. virescens
© 2022 Ron Vanderhoff

Eremocarpus setigerus    Turkey-mullein
native
Annual herb

EUPHORBIACEAE

Eremocarpus setigerus
© 2011 Steve Matson
Eremocarpus setigerus
© 2011 Steve Matson
Eremocarpus setigerus
© 2014 Richard Chasey

Eriastrum sapphirinum ssp. dasyanthum    Sapphire woollystar
native
Annual herb

POLEMONIACEAE

Eriastrum sapphirinum ssp. dasyanthum
© 2018 Diane Etchison
Eriastrum sapphirinum ssp. dasyanthum
© 2020 Ron Vanderhoff
Eriastrum sapphirinum ssp. dasyanthum
© 2023 Ron Vanderhoff

Erigeron foliosus    Leafy daisy,  Leafy fleabane
native
Perennial herb

ASTERACEAE

Erigeron foliosus
© 2022 Ron Vanderhoff
Erigeron foliosus
© 2022 Ryan O'Dell
Erigeron foliosus
© 2023 R.A. Chasey

Erigeron foliosus var. foliosus    Leafy fleabane,  Thread stemmed fleabane
native
Perennial herb, Shrub

ASTERACEAE

Erigeron foliosus var. foliosus
© 2023 Ron Vanderhoff
Erigeron foliosus var. foliosus
© 2021 Jacob Martin
Erigeron foliosus var. foliosus
© 2022 Ron Vanderhoff

Erigeron foliosus var. stenophyllus    Leafy fleabane,  Thread stemmed fleabane
native
Perennial herb, Shrub

ASTERACEAE

Erigeron foliosus var. stenophyllus
© 2023 Ron Vanderhoff
Erigeron foliosus var. stenophyllus
© 2021 Jacob Martin
Erigeron foliosus var. stenophyllus
© 2022 Ron Vanderhoff

Eriodictyon crassifolium    Felt leaved yerba santa,  Thick leaved yerba santa,  Thickleaf yerba santa
native
Shrub

NAMACEAE

Eriodictyon crassifolium
© 2023 Julia Markey
Eriodictyon crassifolium
© 2020 Bonnie Nickel
Eriodictyon crassifolium
© 2021 Mary Herr

Eriogonum davidsonii    Davidson buckwheat,  Davidson's buckwheat
native
Annual herb

POLYGONACEAE

Eriogonum davidsonii
© 2008 Steve Matson
Eriogonum davidsonii
© 2008 Steve Matson
Eriogonum davidsonii
© 2008 Steve Matson

Eriogonum elongatum    Longstem buckwheat
native
Perennial herb

POLYGONACEAE

Eriogonum elongatum
© 2022 David Strauch
Eriogonum elongatum
© 2017 Ron Vanderhoff
Eriogonum elongatum
© 2014 Julia King

Eriogonum fasciculatum ssp. foliolosum    California buckwheat,  Eastern mojave buckwheat,  Red topped buckwheat
native
Shrub

POLYGONACEAE

Eriogonum fasciculatum ssp. foliolosum
© 2016 Michael Mitchell
Eriogonum fasciculatum ssp. foliolosum
© 2015 Michael Mitchell
Eriogonum fasciculatum ssp. foliolosum
© 2015 Michael Mitchell

Eriogonum gracile    Slender buckwheat,  Slender woolly buckwheat
native
Annual herb

POLYGONACEAE

Eriogonum gracile
© 2022 Mike Russler
Eriogonum gracile
© 2018 Fred Melgert / Carla Hoegen
Eriogonum gracile
© 2019 Hailey Laskey

Eriogonum nudum ssp. saxicola    Weston's buckwheat
native
Shrub

POLYGONACEAE

Eriogonum nudum ssp. saxicola
© 2022 Steve Matson
Eriogonum nudum ssp. saxicola
© 2022 Steve Matson
Eriogonum nudum ssp. saxicola
© 2011 Steve Matson

Eriogonum thurberi    Thurber eriogonum,  Thurber's buckwheat
native
Annual herb

POLYGONACEAE

Eriogonum thurberi
© 2017 David Magney
Eriogonum thurberi
© 2024 Arlee Montalvo
Eriogonum thurberi
© 2024 Arlee Montalvo

Eriophyllum confertiflorum    Golden yarrow,  Yellow yarrow
native
Shrub

ASTERACEAE

Eriophyllum confertiflorum
© 2019 Stacie Wolny
Eriophyllum confertiflorum
© 2022 Mojgan Mahdizadeh
Eriophyllum confertiflorum
© 2019 Marisa Persaud

Erodium brachycarpum    Foothill filaree,  Short fruited filaree,  Shortfruit stork's bill
invasive non-native
Annual herb

GERANIACEAE

Erodium brachycarpum
© 2016 Bob van Duinen
Erodium brachycarpum
© 2020 Angelique Herman
Erodium brachycarpum
© 2016 Steve Matson

Erodium cicutarium    Coastal heron's bill,  Red stemmed filaree,  Redstem stork's bill
invasive non-native
Annual herb

GERANIACEAE

Erodium cicutarium
© 2022 Steve Matson
Erodium cicutarium
© 2008 Steve Matson
Erodium cicutarium
© 2022 Steve Matson

Erodium moschatum    Musky stork's bill,  White stemmed filaree,  Whitestem filaree
invasive non-native
Annual herb

GERANIACEAE

Erodium moschatum
© 2016 Steve Matson
Erodium moschatum
© 2016 Steve Matson
Erodium moschatum
© 2016 Steve Matson

Eryngium parishii    Parish's eryngo,  San diego button celery
rare native
Annual, Perennial herb

APIACEAE

Eryngium parishii
© 2019 Ron Vanderhoff
Eryngium parishii
© 2023 Caitlin Kreutz
Eryngium parishii
© 2019 Ron Vanderhoff

native
Annual, Perennial herb

PAPAVERACEAE

Eschscholzia californica var. peninsularis
© 2019 Dee Shea Himes
Eschscholzia californica var. peninsularis
© 2021 Ron Vanderhoff
Eschscholzia californica var. peninsularis
© 2019 Amy Rapport

Eucrypta chrysanthemifolia ssp. chrysanthemifolia    Common eucrypta,  Spotted hideseed
native
Annual herb

HYDROPHYLLACEAE

Eucrypta chrysanthemifolia ssp. chrysanthemifolia
© 2014 Steve Matson
Eucrypta chrysanthemifolia ssp. chrysanthemifolia
© 2014 Steve Matson
Eucrypta chrysanthemifolia ssp. chrysanthemifolia
© 2014 Steve Matson

Euphorbia spathulata    Reticulate seeded spurge,  Warty spurge
native
Annual herb

EUPHORBIACEAE

Euphorbia spathulata
© 2021 R.A. Chasey
Euphorbia spathulata
© 2014 Steve Matson
Euphorbia spathulata
© 2014 Steve Matson

Evax acaulis    Dwarf dwarf cudweed,  Hogwallow starfish
rare native
Annual herb

ASTERACEAE

Evax acaulis
© 2018 John Dittes
Evax acaulis
© 2020 Phil Johnson
Evax acaulis
© 2022 Steve Matson

Filago californica    California cottonrose
native
Annual herb

ASTERACEAE

Filago californica
© 2019 Steve Matson
Filago californica
© 2019 Steve Matson
Filago californica
© 2019 Steve Matson

Filago gallica    Narrowleaf cottonrose
non-native
Annual herb

ASTERACEAE

Filago gallica
© 2017 Barbara Boethling
Filago gallica
© 2023 Ron Vanderhoff
Filago gallica
© 2023 Ron Vanderhoff

Foeniculum vulgare    Biscuit root,  Sweet fennel
invasive non-native
Perennial herb

APIACEAE

Foeniculum vulgare
© 2019 Nicole Leatherman
Foeniculum vulgare
© 2019 Ron Vanderhoff
Foeniculum vulgare
© 2018 Henry DiRocco

Frasera parryi    Coahuila frasera
native
Perennial herb

GENTIANACEAE

Frasera parryi
© 2020 Ron Vanderhoff
Frasera parryi
© 2020 Ron Vanderhoff
Frasera parryi
© 2020 Bob Sill

Fraxinus dipetala    California ash,  Flowering ash,  Foothill ash
native
Tree, Shrub

OLEACEAE

Fraxinus dipetala
© 2023 Ron Vanderhoff
Fraxinus dipetala
© 2021 Bryant Baker
Fraxinus dipetala
© 2021 Bryant Baker

Fraxinus velutina var. coriacea    Arizona ash,  Velvet ash
native
Tree

OLEACEAE

Fraxinus velutina var. coriacea
© 2021 Ron Vanderhoff
Fraxinus velutina var. coriacea
© 2021 Ron Vanderhoff
Fraxinus velutina var. coriacea
© 2013 Ron Vanderhoff

Fritillaria biflora    Chocolate lily
native
Perennial herb

LILIACEAE

Fritillaria biflora
© 2006 Steve Matson
Fritillaria biflora
© 2006 Steve Matson
Fritillaria biflora
© 2019 Ron Vanderhoff

Galium angustifolium    Narrow leaved bedstraw,  Narrowleaf bedstraw
native
Perennial herb

RUBIACEAE

Galium angustifolium
© 2019 Bonnie Nickel
Galium angustifolium
© 2017 Diane Etchison
Galium angustifolium
© 2020 Ron Vanderhoff

Galium aparine    Cleavers,  Common bedstraw,  Goose grass
native
Annual herb

RUBIACEAE

Galium aparine
© 2020 Ron Vanderhoff
Galium aparine
© 2005 Steve Matson
Galium aparine
© 2020 Ron Vanderhoff

Galium nuttallii ssp. nuttallii    Climbing bedstraw
native
Perennial herb

RUBIACEAE

Galium nuttallii ssp. nuttallii
© 2016 Ron Vanderhoff
Galium nuttallii ssp. nuttallii
© 2019 Diane Etchison
Galium nuttallii ssp. nuttallii
© 2018 Ron Vanderhoff

Garrya veatchii    Canyon silktassel,  Southern silk tassel,  Veatch silktassel
native
Shrub

GARRYACEAE

Garrya veatchii
© 2023 Devon Christian
Garrya veatchii
© 2016 Ron Vanderhoff
Garrya veatchii
© 2020 Bryant Baker

Gastridium ventricosum    Nit grass
non-native
Annual grass

POACEAE

Gastridium ventricosum
© 2020 Ron Vanderhoff
Gastridium ventricosum
© 2020 Ron Vanderhoff
Gastridium ventricosum
© 2017 Gary McDonald

Geranium dissectum    Cranesbill,  Cut leaved geranium,  Cutleaf geranium
invasive non-native
Annual herb

GERANIACEAE

Geranium dissectum
© 2021 Al Keuter
Geranium dissectum
© 2023 Ron Vanderhoff
Geranium dissectum
© 2014 Bryan Derr

Gilia angelensis    Chaparral gilia
native
Annual herb

POLEMONIACEAE

Gilia angelensis
© 2023 Ron Vanderhoff
Gilia angelensis
© 2021 Ron Vanderhoff
Gilia angelensis
© 2021 Ron Vanderhoff

Gilia capitata ssp. abrotanifolia    Ball gilia,  Blue field gilia,  Bluehead gilia
native
Annual herb

POLEMONIACEAE

Gilia capitata ssp. abrotanifolia
© 2022 Ryan O'Dell
Gilia capitata ssp. abrotanifolia
© 2016 Steve Matson
Gilia capitata ssp. abrotanifolia
© 2019 Diane Etchison

Gnaphalium bicolor    Two-color rabbit-tobacco
native
Perennial herb

ASTERACEAE

Gnaphalium bicolor
© 2019 David Greenberger
Gnaphalium bicolor
© 2019 Ron Vanderhoff
Gnaphalium bicolor
© 2019 Ron Vanderhoff

Gnaphalium californicum    Ladies' tobacco
native
Annual, Perennial herb

ASTERACEAE

Gnaphalium californicum
© 2019 Gary McDonald
Gnaphalium californicum
© 2020 Steven M Norris
Gnaphalium californicum
© 2021 Ron Vanderhoff

Gnaphalium chilense    Cottonbatting plant
native
Perennial herb

ASTERACEAE

Gnaphalium chilense
© 2017 Gary McDonald
Gnaphalium chilense
© 2017 Gary McDonald
Gnaphalium chilense
© 2017 Gary McDonald

Gnaphalium leucocephalum    White cudweed,  White rabbit tobacco
rare native
Perennial herb

ASTERACEAE

Gnaphalium leucocephalum
© 2021 Aaron Echols
Gnaphalium leucocephalum
© 2021 Aaron Echols
Gnaphalium leucocephalum
© 2021 Aaron Echols

Gnaphalium luteo-album    Jersey cudweed
non-native
Annual herb

ASTERACEAE

Gnaphalium luteo-album
© 2021 Ron Vanderhoff
Gnaphalium luteo-album
© 2019 Diane Etchison
Gnaphalium luteo-album
© 2021 Ron Vanderhoff

Gnaphalium microcephalum    Wright's cudweed
native
Perennial herb

ASTERACEAE

Gnaphalium microcephalum
© 2020 Ron Vanderhoff
Gnaphalium microcephalum
© 2022 David Strauch
Gnaphalium microcephalum
© 2019 Ron Vanderhoff

Gnaphalium palustre    Lowland cudweed,  Western marsh cudweed
native
Annual herb

ASTERACEAE

Gnaphalium palustre
© 2019 Ron Vanderhoff
Gnaphalium palustre
© 2005 Steve Matson
Gnaphalium palustre
© 2019 Ron Vanderhoff

Gnaphalium purpureum    Featherweed
native
Perennial herb

ASTERACEAE

Gnaphalium purpureum
© 2019 Gary McDonald
Gnaphalium purpureum
© 2021 Zoya Akulova-Barlow
Gnaphalium purpureum
© 2019 Gary McDonald

Gutierrezia californica    California matchweed,  Matchweed, snakeweed,  San joaquin snakeweed
native
Perennial herb, Shrub

ASTERACEAE

Gutierrezia californica
© 2021 Helen Hancock
Gutierrezia californica
© 2018 Ron Vanderhoff
Gutierrezia californica
© 2021 Mike Russler

Habenaria unalascensis    Alaska piperia,  Alaska rein orchid,  Rein orchid
native
Perennial herb

ORCHIDACEAE

Habenaria unalascensis
© 2006 Steve Matson
Habenaria unalascensis
© 2022 Steve Matson
Habenaria unalascensis
© 2022 Steve Matson

Haplopappus palmeri ssp. pachylepis    Broad scaled palmer's goldenbush,  Palmer's rabbitbrush
native
Shrub

ASTERACEAE

Haplopappus palmeri ssp. pachylepis
© 2024 Ron Vanderhoff
Haplopappus palmeri ssp. pachylepis
© 2021 Ron Vanderhoff
Haplopappus palmeri ssp. pachylepis
© 2021 Ron Vanderhoff

Haplopappus squarrosus ssp. grindelioides    Gum plant goldenbush,  Saw toothed goldenbush,  Sawtooth bristleweed
native
Shrub

ASTERACEAE

Haplopappus squarrosus ssp. grindelioides
© 2019 Ron Vanderhoff
Haplopappus squarrosus ssp. grindelioides
© 2023 Ron Vanderhoff
Haplopappus squarrosus ssp. grindelioides
© 2022 Ron Vanderhoff

Haplopappus venetus ssp. vernonioides    Coastal goldenbush,  Green leaved dune goldenbush,  Menzies' goldenbush
native
Shrub

ASTERACEAE

Haplopappus venetus ssp. vernonioides
© 2014 Steve Matson
Haplopappus venetus ssp. vernonioides
© 2014 Steve Matson
Haplopappus venetus ssp. vernonioides
© 2014 Steve Matson

Helianthemum scoparium    Peak Rushrose
native
Shrub

CISTACEAE

Helianthemum scoparium
© 2018 Amy Rapport
Helianthemum scoparium
© 2023 Ron Vanderhoff
Helianthemum scoparium
© 2022 R.A. Chasey

Helianthus annuus ssp. lenticularis    Common sunflower,  Hairy leaved sunflower,  Sunflower
native
Annual herb

ASTERACEAE

Helianthus annuus ssp. lenticularis
© 2019 Bob Case
Helianthus annuus ssp. lenticularis
© 2019 Bob Case
Helianthus annuus ssp. lenticularis
© 2021 Mike Russler

Helianthus gracilentus    Slender sunflower
native
Perennial herb

ASTERACEAE

Helianthus gracilentus
© 2021 Ron Vanderhoff
Helianthus gracilentus
© 2021 Mike Russler
Helianthus gracilentus
© 2021 Diane Etchison

Heliotropium curassavicum ssp. oculatum    Alkali heliotrope,  Seaside heliotrope
native
Perennial herb

HELIOTROPIACEAE

Heliotropium curassavicum ssp. oculatum
© 2019 Ron Vanderhoff
Heliotropium curassavicum ssp. oculatum
© 2019 Rachelle Gray
Heliotropium curassavicum ssp. oculatum
© 2021 Suzanne L. Weakley

Hemizonia fasciculata    Clustered tarweed
native
Annual herb

ASTERACEAE

Hemizonia fasciculata
© 2022 David Strauch
Hemizonia fasciculata
© 2017 Steve Matson
Hemizonia fasciculata
© 2017 Steve Matson

Hemizonia paniculata ssp. paniculata    Paniculate tarplant,  San Diego tarweed
rare native
Annual herb

ASTERACEAE

Hemizonia paniculata ssp. paniculata
© 2017 Ron Vanderhoff
Hemizonia paniculata ssp. paniculata
© 2019 Ron Vanderhoff
Hemizonia paniculata ssp. paniculata
© 2022 Ron Vanderhoff

Hesperolinon micranthum    Common dwarf flax,  Small flower western flax,  Small flowered dwarf flax
native
Annual herb

LINACEAE

Hesperolinon micranthum
© 2020 David Greenberger
Hesperolinon micranthum
© 2023 R.A. Chasey
Hesperolinon micranthum
© 2021 R.A. Chasey

Heteromeles arbutifolia ssp. arbutifolia    Christmas berry,  Toyon
native
Shrub

ROSACEAE

Heteromeles arbutifolia ssp. arbutifolia
© 2015 James Gonsman
Heteromeles arbutifolia ssp. arbutifolia
© 2017 Gary McDonald
Heteromeles arbutifolia ssp. arbutifolia
© 2017 Gary McDonald

Heterotheca grandiflora    Telegraph weed,  Telegraphweed
native
Annual, Perennial herb

ASTERACEAE

Heterotheca grandiflora
© 2021 Mike Russler
Heterotheca grandiflora
© 2021 Mike Russler
Heterotheca grandiflora
© 2021 Mike Russler

Holocarpha virgata ssp. elongata    Graceful tarplant,  Wand tarbush
rare native
Annual herb

ASTERACEAE

Holocarpha virgata ssp. elongata
© 2020 Mary Wloch
Holocarpha virgata ssp. elongata
© 2020 Mary Wloch
Holocarpha virgata ssp. elongata
© 2021 Ron Vanderhoff

Hordeum californicum    California barley,  California meadow barley
native
Perennial grass

POACEAE

Hordeum californicum
© 2011 Steve Matson
Hordeum californicum
© 2011 Steve Matson
Hordeum californicum
© 2011 Steve Matson

Hordeum geniculatum    Barley,  Mediterranean barley
non-native
Annual grass

POACEAE

Hordeum geniculatum
© 2018 Carolyn
Hordeum geniculatum
© 2020 Paul Aigner
Hordeum geniculatum
© 2017 Toni Corelli

Hordeum glaucum    Blue foxtail,  Smooth barley
non-native
Annual grass

POACEAE

Hordeum glaucum
© 2018 Gary McDonald
Hordeum glaucum
© 2019 Gary McDonald
Hordeum glaucum
© 2017 Gary McDonald

Hordeum leporinum    Farmer's foxtail,  Foxtail barley,  Hare barley
non-native
Annual grass

POACEAE

Hordeum leporinum
© 2022 Ron Vanderhoff
Hordeum leporinum
© 2021 Al Keuter
Hordeum leporinum
© 2021 Ron Vanderhoff

Hydrocotyle ranunculoides    Floating marsh pennywort,  Floating marshpennywort,  Marsh pennywort
native
Perennial herb

ARALIACEAE

Hydrocotyle ranunculoides
© 2019 R.A. Chasey
Hydrocotyle ranunculoides
© 2023 R.A. Chasey
Hydrocotyle ranunculoides
© 2017 Michael Mitchell

Hypericum anagalloides    Creeping st. john's wort,  Tinker's penny
native
Annual, Perennial herb

HYPERICACEAE

Hypericum anagalloides
© 2019 Bob Sweatt
Hypericum anagalloides
© 2020 Joaquin Hale
Hypericum anagalloides
© 2021 Mike Russler

Hypericum formosum ssp. scouleri    Scouler's St John's wort
native
Perennial herb

HYPERICACEAE

Hypericum formosum ssp. scouleri
© 2021 Julie A. Kierstead
Hypericum formosum ssp. scouleri
© 2022 Steve Matson
Hypericum formosum ssp. scouleri
© 2019 Julie Kierstead Nelson

Hypericum perforatum    Common st. johnswort,  Klamath weed,  Klamathweed
invasive non-native
Perennial herb

HYPERICACEAE

Hypericum perforatum
© 2020 Bob Sweatt
Hypericum perforatum
© 2018 stephen rosenthal
Hypericum perforatum
© 2020 Bob Sweatt

Hypochaeris glabra    Smooth cat's ear
invasive non-native
Annual herb

ASTERACEAE

Hypochaeris glabra
© 2020 Ron Vanderhoff
Hypochaeris glabra
© 2017 Gary McDonald
Hypochaeris glabra
© 2019 Ron Vanderhoff

Isoetes howellii    Howell's quillwort,  Quillwort
native

ISOETACEAE

Isoetes howellii
© 2022 Ken-ichi Ueda
Isoetes howellii
© 2022 Ken-ichi Ueda
Isoetes howellii
© 2023 R.A. Chasey

Isoetes orcuttii    Orcutt's quillwort
native

ISOETACEAE

Isoetes orcuttii
© 2017 Art Clark
Isoetes orcuttii
© 2004 Carol W. Witham
Isoetes orcuttii
© 2012 Gary A. Monroe

Jepsonia parryi    Parry's jepsonia
native
Perennial herb

SAXIFRAGACEAE

Jepsonia parryi
© 2009 Ron Vanderhoff
Jepsonia parryi
© 2012 Cynthia Keiser
Jepsonia parryi
© 2011 Keir Morse

Juglans californica    Southern black walnut,  Southern california walnut,  Southern california black walnut
rare native
Tree

JUGLANDACEAE

Juglans californica
© 2014 Garth Wadsworth
Juglans californica
© 2022 Aaron Echols
Juglans californica
© 2022 Ron Vanderhoff

Juglans regia    English walnut
non-native
Tree

JUGLANDACEAE

Juglans regia
© 2018 Ron Vanderhoff
Juglans regia
© 2019 Janice Kuch
Juglans regia
© 2014 Richard Chasey

Juncus balticus    Baltic rush,  Wire rush
native
Perennial grasslike herb

JUNCACEAE

Juncus balticus
© 2015 Steve Matson
Juncus balticus
© 2015 Steve Matson
Juncus balticus
© 2019 Bonnie Nickel

Juncus bufonius    Common toad rush,  Toad rush
native
Annual grasslike herb

JUNCACEAE

Juncus bufonius
© 2022 Steve Matson
Juncus bufonius
© 2022 Steve Matson
Juncus bufonius
© 2022 Steve Matson

Juncus effusus var. pacificus    Pacific rush
native
Perennial grasslike herb

JUNCACEAE

Juncus effusus var. pacificus
© 2009 Toni Corelli
Juncus effusus var. pacificus
© 2021 R.A. Chasey
Juncus effusus var. pacificus
© 2021 John Rawlings

Juncus macrophyllus    Long leaved rush,  Longleaf rush,  Rush
native
Perennial grasslike herb

JUNCACEAE

Juncus macrophyllus
© 2019 Ron Vanderhoff
Juncus macrophyllus
© 2019 Ron Vanderhoff
Juncus macrophyllus
© 2023 R.A. Chasey

Juncus mexicanus    Mexican rush
native
Perennial grasslike herb

JUNCACEAE

Juncus mexicanus
© 2004 Steve Matson
Juncus mexicanus
© 2020 Mary Wloch
Juncus mexicanus
© 2019 Diane Etchison

Juncus oxymeris    Pointed rush
native
Perennial grasslike herb

JUNCACEAE

Juncus oxymeris
© 2016 Steve Matson
Juncus oxymeris
© 2016 Steve Matson
Juncus oxymeris
© 2016 Steve Matson

Juncus rugulosus    Wrinkled rush
native
Perennial grasslike herb

JUNCACEAE

Juncus rugulosus
© 2005 Steve Matson
Juncus rugulosus
© 2017 Ron Vanderhoff
Juncus rugulosus
© 2020 Ron Vanderhoff

Juncus sphaerocarpus    Round fruited toad rush,  Western toad rush
native
Perennial grasslike herb

JUNCACEAE

Juncus sphaerocarpus
© 2004 Steve Matson
Juncus sphaerocarpus
© 2017 Keir Morse
Juncus sphaerocarpus
© 2010 Toni Corelli

Juncus textilis    Basket rush
native
Perennial grasslike herb

JUNCACEAE

Juncus textilis
© 2020 Ron Vanderhoff
Juncus textilis
© 2020 Ron Vanderhoff
Juncus textilis
© 2020 Ron Vanderhoff

Juncus tiehmii    Nevada rush,  Tiehm's rush
native
Annual grasslike herb

JUNCACEAE

Juncus tiehmii
© 2005 Steve Matson
Juncus tiehmii
© 2005 Steve Matson
Juncus tiehmii
© 2003 Steve Matson

Juncus xiphioides    Iris leaved rush,  Irisleaf rush
native
Perennial grasslike herb

JUNCACEAE

Juncus xiphioides
© 2016 Erik Larsen
Juncus xiphioides
© 2017 Ron Vanderhoff
Juncus xiphioides
© 2023 R.A. Chasey

Juniperus californica    California juniper
native
Shrub

CUPRESSACEAE

Juniperus californica
© 2019 Patrick Furtado
Juniperus californica
© 2017 Gary McDonald
Juniperus californica
© 2014 Ron Vanderhoff

Keckiella antirrhinoides ssp. antirrhinoides    Chaparral beard tongue
native
Shrub

PLANTAGINACEAE

Keckiella antirrhinoides ssp. antirrhinoides
© 2020 Ron Vanderhoff
Keckiella antirrhinoides ssp. antirrhinoides
© 2019 Ron Vanderhoff
Keckiella antirrhinoides ssp. antirrhinoides
© 2020 Diane Etchison

Keckiella cordifolia    Climbing penstemon,  Heart leaved keckiella,  Heartleaf keckiella
native
Shrub

PLANTAGINACEAE

Keckiella cordifolia
© 2020 Ron Vanderhoff
Keckiella cordifolia
© 2022 Bryant Baker
Keckiella cordifolia
© 2022 Bryant Baker

Koeleria macrantha    June grass,  Prairie junegrass
native
Perennial grass

POACEAE

Koeleria macrantha
© 2015 Steve Matson
Koeleria macrantha
© 2015 Steve Matson
Koeleria macrantha
© 2015 Steve Matson

Lactuca serriola    Prickly lettuce,  Prickly wild lettuce
invasive non-native
Annual herb

ASTERACEAE

Lactuca serriola
© 2017 Gary McDonald
Lactuca serriola
© 2017 Gary McDonald
Lactuca serriola
© 2017 Gary McDonald

Lagophylla ramosissima    Branched lagophylla,  Common hareleaf
native
Annual herb

ASTERACEAE

Lagophylla ramosissima
© 2019 Diane Etchison
Lagophylla ramosissima
© 2021 Dee Shea Himes
Lagophylla ramosissima
© 2020 Ken Hickman

Lamarckia aurea    Goldentop grass
non-native
Annual grass

POACEAE

Lamarckia aurea
© 2017 B.J. Dion
Lamarckia aurea
© 2019 Ron Vanderhoff
Lamarckia aurea
© 2015 James Gonsman

Lastarriaea coriacea    Leather spineflower
native
Annual herb

POLYGONACEAE

Lastarriaea coriacea
© 2020 Ron Vanderhoff
Lastarriaea coriacea
© 2020 Ron Vanderhoff
Lastarriaea coriacea
© 2021 Jacob Smith

Lasthenia chrysostoma    California goldfields
native
Annual herb

ASTERACEAE

Lasthenia chrysostoma
© 2021 Charles Russell
Lasthenia chrysostoma
© 2022 Steve Matson
Lasthenia chrysostoma
© 2015 Toni Corelli

native
Perennial herb

FABACEAE

Lathyrus laetiflorus ssp. alefeldii
© 2019 Ron Vanderhoff
Lathyrus laetiflorus ssp. alefeldii
© 2016 Mark Harelik
Lathyrus laetiflorus ssp. alefeldii
© 2019 Diane Etchison

Layia platyglossa ssp. campestris    Coastal tidytips
native
Annual herb

ASTERACEAE

Layia platyglossa ssp. campestris
© 2015 Amy Rapport
Layia platyglossa ssp. campestris
© 2019 Jenna T. B. Ekwealor
Layia platyglossa ssp. campestris
© 2017 Chris Mo

Lemna gibba    Duckweed,  Gibbous duckweed,  Swollen duckweed
native
Perennial herb

ARACEAE

Lemna gibba
© 2020 Ron Vanderhoff
Lemna gibba
© 2021 Ron Vanderhoff
Lemna gibba
© 2019 Ron Vanderhoff

Lemna minor    Smaller duckweed
native
Perennial herb

ARACEAE

Lemna minor
© 2019 Ron Vanderhoff
Lemna minor
© 2019 Ron Vanderhoff
Lemna minor
© 2022 R.A. Chasey

Lemna minuscula    Least duckweed
native
Perennial herb

ARACEAE

Lemna minuscula
© 2022 Ron Vanderhoff
Lemna minuscula
© 2020 Ron Vanderhoff
Lemna minuscula
© 2019 Ron Vanderhoff

Lepidium nitidum    Peppergrass,  Shining pepper grass,  Shining pepperweed
native
Annual herb

BRASSICACEAE

Lepidium nitidum
© 2021 Steve Matson
Lepidium nitidum
© 2016 Steve Matson
Lepidium nitidum
© 2021 Steve Matson

Leptochloa uninervia    Mexican sprangletop
native
Annual grass

POACEAE

Leptochloa uninervia
© 2009 Ron Vanderhoff
Leptochloa uninervia
© 2012 James M. Andre
Leptochloa uninervia
© 2016 Neil Uelman

native
Shrub

POLEMONIACEAE

Leptodactylon californicum ssp. glandulosum
© 2018 Ron Vanderhoff
Leptodactylon californicum ssp. glandulosum
© 2020 Matt Berger
Leptodactylon californicum ssp. glandulosum
© 2019 Diane Etchison

Lilaea scilloides    Flowering-quillwort
native
Annual herb (aquatic)

JUNCAGINACEAE

Lilaea scilloides
© 2018 Carol Witham
Lilaea scilloides
© 2023 Ron Vanderhoff
Lilaea scilloides
© 2011 Hattie Brown

Lilium humboldtii ssp. ocellatum    Humboldt lily,  Spotted humboldt's lily
rare native
Perennial herb (bulb)

LILIACEAE

Lilium humboldtii ssp. ocellatum
© 2019 Ron Vanderhoff
Lilium humboldtii ssp. ocellatum
© 2020 Tom Ballinger
Lilium humboldtii ssp. ocellatum
© 2019 Ron Vanderhoff

Limnanthes gracilis var. parishii    Parish's meadowfoam
rare native
Annual herb

LIMNANTHACEAE

Limnanthes gracilis var. parishii
© Roxanne Bittman and CNPS
Limnanthes gracilis var. parishii
© Roxanne Bittman and CNPS

Linanthus androsaceus ssp. luteolus    Variable linanthus
native
Annual herb

POLEMONIACEAE

Linanthus androsaceus ssp. luteolus
© 2008 Keir Morse
Linanthus androsaceus ssp. luteolus
© 2008 Keir Morse
Linanthus androsaceus ssp. luteolus
© 2008 Keir Morse

native
Annual herb

POLEMONIACEAE

Linanthus dianthiflorus ssp. dianthiflorus
© 2020 David Greenberger
Linanthus dianthiflorus ssp. dianthiflorus
© 2017 Diane Etchison
Linanthus dianthiflorus ssp. dianthiflorus
© 2023 Ron Vanderhoff

Linanthus floribundus ssp. floribundus    Many flowered linanthus
native
Perennial herb

POLEMONIACEAE

Linanthus floribundus ssp. floribundus
© 2020 Ron Vanderhoff
Linanthus floribundus ssp. floribundus
© 2021 Arlee Montalvo
Linanthus floribundus ssp. floribundus
© 2022 Ron Vanderhoff

Linanthus liniflorus ssp. pharnaceoides    Narrowflower flaxflower
native
Annual herb

POLEMONIACEAE

Linanthus liniflorus ssp. pharnaceoides
© 2017 Aaron Echols
Linanthus liniflorus ssp. pharnaceoides
© 2022 Ron Vanderhoff
Linanthus liniflorus ssp. pharnaceoides
© 2023 Diana Wahl

native
Annual herb

POLEMONIACEAE

Linanthus pygmaeus ssp. continentalis
© 2019 Steve Matson
Linanthus pygmaeus ssp. continentalis
© 2019 Steve Matson
Linanthus pygmaeus ssp. continentalis
© 2019 Steve Matson

Linaria canadensis var. texana    Blue toadflax
native
Annual, Perennial herb

PLANTAGINACEAE

Linaria canadensis var. texana
© 2017 Steve Matson
Linaria canadensis var. texana
© 2017 Steve Matson
Linaria canadensis var. texana
© 2017 Steve Matson

Lithophragma affine ssp. mixtum    Common woodland star,  San Francisco woodland star
native
Perennial herb

SAXIFRAGACEAE

Lithophragma affine ssp. mixtum
© 2018 Steve Matson
Lithophragma affine ssp. mixtum
© 2018 Steve Matson
Lithophragma affine ssp. mixtum
© 2018 Steve Matson

Lobelia cardinalis ssp. graminea    Cardinalflower
native
Perennial herb

CAMPANULACEAE

Lobelia cardinalis ssp. graminea
© 2020 Fred Melgert / Carla Hoegen
Lobelia cardinalis ssp. graminea
© 2012 John Rusk
Lobelia cardinalis ssp. graminea
© 2020 Fred Melgert / Carla Hoegen

Lolium perenne ssp. multiflorum    Italian rye grass
invasive non-native
Annual, Perennial grass

POACEAE

Lolium perenne ssp. multiflorum
© 2019 Ron Vanderhoff
Lolium perenne ssp. multiflorum
© 2017 Gary McDonald
Lolium perenne ssp. multiflorum
© 2021 Ron Vanderhoff

Lolium temulentum    Darnel, tares
non-native
Annual grass

POACEAE

Lolium temulentum
© 2016 Spade Natural Resources Consulting
Lolium temulentum
© 2020 David popp
Lolium temulentum
© 2019 Stephany Dery

Lomatium dasycarpum ssp. dasycarpum    Woolly fruited lomatium,  Woollyfruit desertparsley
native
Perennial herb

APIACEAE

Lomatium dasycarpum ssp. dasycarpum
© 2016 Steve Matson
Lomatium dasycarpum ssp. dasycarpum
© 2016 Steve Matson
Lomatium dasycarpum ssp. dasycarpum
© 2016 Steve Matson

Lomatium lucidum    Shiny biscuitroot,  Shiny lomatium
native
Perennial herb

APIACEAE

Lomatium lucidum
© 2019 Diane Etchison
Lomatium lucidum
© 2019 Diane Etchison
Lomatium lucidum
© 2015 Diane Etchison

Lomatium utriculatum    Bladder parsnip,  Common lomatium,  Hog fennel
native
Perennial herb

APIACEAE

Lomatium utriculatum
© 2006 Steve Matson
Lomatium utriculatum
© 2006 Steve Matson
Lomatium utriculatum
© 2015 James Gonsman

Lonicera subspicata var. johnstonii    Chaparral honeysuckle,  Johnston's honeysuckle,  Santa barbara honeysuckle
native
Shrub

CAPRIFOLIACEAE

Lonicera subspicata var. johnstonii
© 2019 Diane Etchison
Lonicera subspicata var. johnstonii
© 2021 Ron Vanderhoff
Lonicera subspicata var. johnstonii
© 2021 Ron Vanderhoff

Lotus hamatus    Small flowered lotus
native
Annual herb

FABACEAE

Lotus hamatus
© 2016 Aaron Echols
Lotus hamatus
© 2016 James Bailey
Lotus hamatus
© 2019 Ron Vanderhoff

Lotus heermannii    Heermann's lotus
native
Perennial herb

FABACEAE

Lotus heermannii
© 2019 Diane Etchison
Lotus heermannii
© 2010 James M. Andre
Lotus heermannii
© 2022 Irene Rosen

Lotus purshianus    American bird's foot trefoil,  Spanish lotus
native
Annual herb

FABACEAE

Lotus purshianus
© 2019 Rachelle Gray
Lotus purshianus
© 2013 Arcangelo Wessells
Lotus purshianus
© 2020 Bob Sweatt

Lotus scoparius ssp. brevialatus    Short winged deerweed
native
Perennial herb

FABACEAE

Lotus scoparius ssp. brevialatus
© 2020 Ron Vanderhoff
Lotus scoparius ssp. brevialatus
© 2018 Michelle Tollett
Lotus scoparius ssp. brevialatus
© 2019 Ron Vanderhoff

native
Perennial herb

FABACEAE

Lotus scoparius ssp. scoparius
© 2020 Ron Vanderhoff
Lotus scoparius ssp. scoparius
© 2020 Ron Vanderhoff
Lotus scoparius ssp. scoparius
© 2020 Ron Vanderhoff

Lotus strigosus    Strigose lotus
native
Annual herb

FABACEAE

Lotus strigosus
© 2016 Steve Matson
Lotus strigosus
© 2009 Steve Matson
Lotus strigosus
© 2016 Steve Matson

Lotus subpinnatus    Wrangel lotus
native
Annual herb

FABACEAE

Lotus subpinnatus
© 2016 Steve Matson
Lotus subpinnatus
© 2016 Steve Matson
Lotus subpinnatus
© 2016 Steve Matson

Ludwigia peploides    Floating primrose willow,  Floating water primrose,  Marsh purslane
invasive non-native
Perennial herb

ONAGRACEAE

Ludwigia peploides
© 2022 David Strauch
Ludwigia peploides
© 2019 Lenihan Mazur
Ludwigia peploides
© 2019 Patrick Furtado

Lupinus agardhianus    Bajada lupine,  Elegant lupine,  Scarlet lupine
native
Annual herb

FABACEAE

Lupinus agardhianus
© 2022 Ron Vanderhoff
Lupinus agardhianus
© 2019 Ron Vanderhoff
Lupinus agardhianus
© 2017 B.J. Dion

Lupinus bicolor ssp. microphyllus    Annual lupine,  Bicolored lupine,  Miniature lupine
native
Annual, Perennial herb

FABACEAE

Lupinus bicolor ssp. microphyllus
© 2024 Mary Ann Machi
Lupinus bicolor ssp. microphyllus
© 2022 Mike Russler
Lupinus bicolor ssp. microphyllus
© 2024 Mary Ann Machi

Lupinus concinnus ssp. concinnus    Bajada lupine,  Elegant lupine,  Scarlet lupine
native
Annual herb

FABACEAE

Lupinus concinnus ssp. concinnus
© 2022 Ron Vanderhoff
Lupinus concinnus ssp. concinnus
© 2019 Ron Vanderhoff
Lupinus concinnus ssp. concinnus
© 2017 B.J. Dion

Lupinus densiflorus ssp. austrocollium    Chick lupine,  Valley lupine
native
Annual herb

FABACEAE

Lupinus densiflorus ssp. austrocollium
© 2006 Steve Matson
Lupinus densiflorus ssp. austrocollium
© 2006 Steve Matson
Lupinus densiflorus ssp. austrocollium
© 2006 Steve Matson

Lupinus excubitus ssp. hallii    Hall's bush lupine
native
Shrub

FABACEAE

Lupinus excubitus ssp. hallii
© 2011 Tony Morosco
Lupinus excubitus ssp. hallii
© 2020 Ron Vanderhoff
Lupinus excubitus ssp. hallii
© 2020 Ron Vanderhoff

Lupinus hirsutissimus    Stinging annual lupine,  Stinging lupine
native
Annual herb

FABACEAE

Lupinus hirsutissimus
© 2024 Mike Russler
Lupinus hirsutissimus
© 2023 Neil Uelman
Lupinus hirsutissimus
© 2019 Ron Vanderhoff

Lupinus sparsiflorus ssp. sparsiflorus    Coulter's lupine,  Mohave lupine,  Mojave lupine
native
Annual herb

FABACEAE

Lupinus sparsiflorus ssp. sparsiflorus
© 2022 Ron Vanderhoff
Lupinus sparsiflorus ssp. sparsiflorus
© 2023 Ron Vanderhoff
Lupinus sparsiflorus ssp. sparsiflorus
© 2023 Ron Vanderhoff

Lupinus succulentus    Arroyo lupine,  Hollowleaf annual lupine,  Succulent lupine
native
Annual herb

FABACEAE

Lupinus succulentus
© 2023 Andy Ford
Lupinus succulentus
© 2018 Stacie Wolny
Lupinus succulentus
© 2018 Stacie Wolny

Lupinus truncatus    Blunt leaved lupine,  Collared annual lupine,  Truncate leaf lupine
native
Annual herb

FABACEAE

Lupinus truncatus
© 2023 Caitlin Kreutz
Lupinus truncatus
© 2023 Connor O'Hara-Baker
Lupinus truncatus
© 2010 Michael Mitchell

Lythrum californicum    California loosestrife,  Common loosestrife
native
Perennial herb

LYTHRACEAE

Lythrum californicum
© 2017 Fred Melgert / Carla Hoegen
Lythrum californicum
© 2024 Ken-ichi Ueda
Lythrum californicum
© 2023 Ryan O'Dell

Lythrum hyssopifolium    Hyssop loosestrife
invasive non-native
Annual, Perennial herb

LYTHRACEAE

Lythrum hyssopifolium
© 2019 Diane Etchison
Lythrum hyssopifolium
© 2021 Cynthia Powell
Lythrum hyssopifolium
© 2020 Ron Vanderhoff

Madia gracilis    Grassy tarweed,  Gumweed madia,  Slender tarweed
native
Annual herb

ASTERACEAE

Madia gracilis
© 2022 Mike Russler
Madia gracilis
© 2021 Amber Bedgood
Madia gracilis
© 2019 Ron Vanderhoff

native
Shrub

MALVACEAE

Malacothamnus fasciculatus ssp. laxiflorus
© 2021 Keir Morse
Malacothamnus fasciculatus ssp. laxiflorus
© 2021 Keir Morse
Malacothamnus fasciculatus ssp. laxiflorus
© 2024 Ron Vanderhoff

Malacothrix clevelandii    Cleveland's dandelion,  Cleveland's desertdandelion,  Cleveland's malacothrix
native
Annual herb

ASTERACEAE

Malacothrix clevelandii
© 2021 Steve Laymon
Malacothrix clevelandii
© 2022 Mike Russler
Malacothrix clevelandii
© 2023 R.A. Chasey

Malosma laurinum    Small Tree-Mallow


Malva parviflora    Cheeseweed mallow
non-native
Annual herb

MALVACEAE

Malva parviflora
© 2022 Mike Russler
Malva parviflora
© 2022 Donald Burk
Malva parviflora
© 2022 Mike Russler

Malvella leprosa    Alkali mallow
native
Perennial herb

MALVACEAE

Malvella leprosa
© 2023 Donald Burk
Malvella leprosa
© 2019 Bonnie Nickel
Malvella leprosa
© 2019 Bonnie Nickel

Marah macrocarpus    Chilicothe
native
Perennial herb, Vine

CUCURBITACEAE

Marah macrocarpus
© 2020 David Greenberger
Marah macrocarpus
© 2022 David Strauch
Marah macrocarpus
© 2021 david berman

Marrubium vulgare    White horehound
invasive non-native
Perennial herb

LAMIACEAE

Marrubium vulgare
© ©2013 Gary McDonald
Marrubium vulgare
© 2015 Diane Etchison
Marrubium vulgare
© 2018 Nancy Hamlett

Marsilea vestita    Hairy waterclover
native
Fern

MARSILEACEAE

Marsilea vestita
© 2020 Ron Vanderhoff
Marsilea vestita
© 2020 Ken Hickman
Marsilea vestita
© 2020 Ron Vanderhoff

Matricaria matricarioides    Pineapple weed
native
Annual herb

ASTERACEAE

Matricaria matricarioides
© 2008 Steve Matson
Matricaria matricarioides
© 2008 Steve Matson
Matricaria matricarioides
© 2018 Stacie Wolny

Meconella denticulata    Small flowered meconella,  Smallflower fairypoppy
native
Annual herb

PAPAVERACEAE

Meconella denticulata
© 2019 Ron Vanderhoff
Meconella denticulata
© 2019 Ron Vanderhoff
Meconella denticulata
© 2012 Ron Vanderhoff

Medicago polymorpha    Bur clover,  Bur medic,  California burclover
invasive non-native
Annual herb

FABACEAE

Medicago polymorpha
© 2019 Gary McDonald
Medicago polymorpha
© 2019 Gary McDonald
Medicago polymorpha
© 2019 Gary McDonald

Medicago sativa    Alfalfa
non-native
Perennial herb

FABACEAE

Medicago sativa
© 2017 Hayley Ross
Medicago sativa
© 2020 Bob Sweatt
Medicago sativa
© 2017 Hayley Ross

Melica frutescens    Heligrass,  Tall melica,  Woody melicgrass
native
Perennial grass

POACEAE

Melica frutescens
© 2012 Keir Morse
Melica frutescens
© 2022 Neal Kramer
Melica frutescens
© 2012 Keir Morse

Melica imperfecta    California melic,  Coast range melic,  Small flowered melica
native
Perennial grass

POACEAE

Melica imperfecta
© 2020 Ron Vanderhoff
Melica imperfecta
© 2021 Ron Vanderhoff
Melica imperfecta
© 2020 Ron Vanderhoff

Melilotus albus    White sweetclover
invasive non-native
Annual, Biennial herb

FABACEAE

Melilotus albus
© 2021 Ron Vanderhoff
Melilotus albus
© 2020 Bob Sweatt
Melilotus albus
© 2022 Ron Vanderhoff

Melilotus indicus    Annual yellow sweetclover,  Sourclover
non-native
Annual herb

FABACEAE

Melilotus indicus
© 2019 Randy Huey
Melilotus indicus
© 2019 Randy Huey
Melilotus indicus
© 2017 Rosalie Benitez

Mentha spicata    Spearmint
non-native
Perennial herb

LAMIACEAE

Mentha spicata
© 2022 Donald Burk
Mentha spicata
© 2022 Donald Burk
Mentha spicata
© 2023 Ron Vanderhoff

Mentzelia montana ssp. montana    Mountain blazing star
native
Annual herb

LOASACEAE

Mentzelia montana ssp. montana
© 2018 Diane Etchison
Mentzelia montana ssp. montana
© 2021 R.A. Chasey
Mentzelia montana ssp. montana
© 2018 Mary Merriman

Micropus californicus    Cotton top,  Micropus,  Q tips
native
Annual herb

ASTERACEAE

Micropus californicus
© 2006 Steve Matson
Micropus californicus
© 2006 Steve Matson
Micropus californicus
© 2021 Ron Vanderhoff

Microseris douglasii ssp. platycarpha    Douglas' silverpuffs,  Small flowered microseris
rare native
Annual herb

ASTERACEAE

Microseris douglasii ssp. platycarpha
© 2017 Barbara Boethling
Microseris douglasii ssp. platycarpha
© 2017 Tania Asef
Microseris douglasii ssp. platycarpha
© 2017 Barbara Boethling

Microseris heterocarpa    Grassland stebbinsoseris
native
Annual herb

ASTERACEAE

Microseris heterocarpa
© 2019 Ron Vanderhoff
Microseris heterocarpa
© 2019 Ron Vanderhoff
Microseris heterocarpa
© 2017 Diane Etchison

Microseris linearifolia    Silver puffs,  Uropappus
native
Annual herb

ASTERACEAE

Microseris linearifolia
© 2019 Zack Abbey
Microseris linearifolia
© 2019 Ron Vanderhoff
Microseris linearifolia
© 2016 Ron Vanderhoff

native
Annual herb

POLEMONIACEAE

Microsteris gracilis ssp. gracilis
© 2003 Steve Matson
Microsteris gracilis ssp. gracilis
© 2016 Steve Matson
Microsteris gracilis ssp. gracilis
© 2003 Steve Matson

Mimulus brevipes    Wide throated yellow monkeyflower
native
Annual herb

PHRYMACEAE

Mimulus brevipes
© 2019 Rebecca E. Crowe
Mimulus brevipes
© 2013 Keir Morse
Mimulus brevipes
© 2020 Ron Vanderhoff

Mimulus cardinalis    Cardinal monkey flower
native
Perennial herb

PHRYMACEAE

Mimulus cardinalis
© 2014 James Gonsman
Mimulus cardinalis
© 2023 Steve Conger
Mimulus cardinalis
© 2021 Mike Russler

Mimulus diffusus    Palomar monkeyflower
rare native
Annual herb

PHRYMACEAE

Mimulus diffusus
© 2020 Ron Vanderhoff
Mimulus diffusus
© 2019 Ron Vanderhoff
Mimulus diffusus
© 2019 Ron Vanderhoff

Mimulus floribundus    Many flowered monkeyflower
native
Annual herb

PHRYMACEAE

Mimulus floribundus
© 2021 Mike Russler
Mimulus floribundus
© 2019 Diane Etchison
Mimulus floribundus
© 2021 Mike Russler

Mimulus guttatus ssp. guttatus    Seep monkey flower,  Yellow monkey flower
native
Annual, Perennial herb (rhizomatous)

PHRYMACEAE

Mimulus guttatus ssp. guttatus
© 2019 Stacie Wolny
Mimulus guttatus ssp. guttatus
© 2015 James Gonsman
Mimulus guttatus ssp. guttatus
© 2019 Stacie Wolny

Mimulus pilosus    Snouted monkey flower
native
Annual herb

PHRYMACEAE

Mimulus pilosus
© 2017 Steve Matson
Mimulus pilosus
© 2017 Steve Matson
Mimulus pilosus
© 2017 Steve Matson

Mirabilis californica var. californica    California four o'clock
native
Perennial herb

NYCTAGINACEAE

Mirabilis californica var. californica
© 2014 Steve Matson
Mirabilis californica var. californica
© 2014 Steve Matson
Mirabilis californica var. californica
© 2014 Steve Matson

Monardella lanceolata    Mustang mint
native
Annual herb

LAMIACEAE

Monardella lanceolata
© 2022 Diane Etchison
Monardella lanceolata
© 2018 David popp
Monardella lanceolata
© 2022 Mike Russler

Montia fontana ssp. amporitana    Annual water minerslettuce,  Water chickweed,  Water montia
native
Annual herb

MONTIACEAE

Montia fontana ssp. amporitana
© 2023 Alaine Arslan
Montia fontana ssp. amporitana
© 2023 Alaine Arslan
Montia fontana ssp. amporitana
© 2006 Steve Matson

Muhlenbergia asperifolia    Scratchgrass
native
Perennial grass

POACEAE

Muhlenbergia asperifolia
© 2017 Steve Matson
Muhlenbergia asperifolia
© 2008 Steve Matson
Muhlenbergia asperifolia
© 2008 Steve Matson

Muhlenbergia microsperma    Annual muhly,  Littleseed muhly
native
Annual grass

POACEAE

Muhlenbergia microsperma
© 2017 Ron Vanderhoff
Muhlenbergia microsperma
© 2019 Ron Vanderhoff
Muhlenbergia microsperma
© 2023 Ron Vanderhoff

Muhlenbergia rigens    Deergrass
native
Perennial grass

POACEAE

Muhlenbergia rigens
© 2004 Steve Matson
Muhlenbergia rigens
© 2018 Cynthia Powell
Muhlenbergia rigens
© 2022 Ron Vanderhoff

Muilla maritima    Common muilla,  Sea muilla
native
Perennial herb

THEMIDACEAE

Muilla maritima
© 2017 Steve Matson
Muilla maritima
© 2017 Steve Matson
Muilla maritima
© 2017 Steve Matson

Myosurus minimus var. apus    Tiny mouse tail,  Vernal pool mousetail
native
Annual herb

RANUNCULACEAE

Myosurus minimus var. apus
© 2015 Julia King
Myosurus minimus var. apus
© 2024 Denise Defreese
Myosurus minimus var. apus
© 2003 George W. Hartwell

Najas marina    Marine water nymph,  Spiny naiad
native
Annual herb

HYDROCHARITACEAE

Najas marina
© 2020 Ron Vanderhoff
Najas marina
© 2020 Ron Vanderhoff
Najas marina
© 2020 Ron Vanderhoff

Nasturtium officinale    Watercress
native
Perennial herb (aquatic)

BRASSICACEAE

Nasturtium officinale
© 2019 Patrick Furtado
Nasturtium officinale
© 2019 Diane Etchison
Nasturtium officinale
© 2012 Steve Matson

Navarretia atractyloides    Holly leaf navarretia,  Hollyleaf pincushionplant
native
Annual herb

POLEMONIACEAE

Navarretia atractyloides
© 2019 Diane Etchison
Navarretia atractyloides
© 2010 George Butterworth
Navarretia atractyloides
© 2019 Ken Hickman

Navarretia hamata ssp. hamata    Hooked navarretia,  Hooked pincushionplant
native
Annual herb

POLEMONIACEAE

Navarretia hamata ssp. hamata
© 2014 Ron Vanderhoff
Navarretia hamata ssp. hamata
© 2020 Phillip Roullard
Navarretia hamata ssp. hamata
© 2009 Neal Kramer

Navarretia intertexta    Interwoven navarretia,  Needle leaved navarretia,  Needleleaf navarretia
native
Annual herb

POLEMONIACEAE

Navarretia intertexta
© 2019 Steve Matson
Navarretia intertexta
© 2019 Steve Matson
Navarretia intertexta
© 2019 Steve Matson

Navarretia prostrata    Prostrate navarretia,  Prostrate pincushionplant
rare native
Annual herb

POLEMONIACEAE

Navarretia prostrata
© 2017 Ron Vanderhoff
Navarretia prostrata
© 2017 Tania Asef
Navarretia prostrata
© 2023 Ron Vanderhoff

native
Annual herb

HYDROPHYLLACEAE

Nemophila menziesii ssp. menziesii
© 2021 Steve Matson
Nemophila menziesii ssp. menziesii
© 2021 Steve Matson
Nemophila menziesii ssp. menziesii
© 2005 Steve Matson

Nicotiana bigelovii    Indian tobacco
native
Annual herb

SOLANACEAE

Nicotiana bigelovii
© 2019 Michael Mitchell
Nicotiana bigelovii
© 2019 Michael Mitchell
Nicotiana bigelovii
© 2016 Lesley Hunt

Nicotiana glauca    Tree tobacco
invasive non-native
Tree, Shrub

SOLANACEAE

Nicotiana glauca
© 2019 Jean B Henney
Nicotiana glauca
© 2017 Steve Matson
Nicotiana glauca
© 2017 Steve Matson

Notholaena newberryi    Newberry's lip fern
native
Fern

PTERIDACEAE

Notholaena newberryi
© 2021 Ron Vanderhoff
Notholaena newberryi
© 2021 Ron Vanderhoff
Notholaena newberryi
© 2023 Julia Markey

Oenothera californica    California evening primrose,  California primrose
native
Perennial herb

ONAGRACEAE

Oenothera californica
© 2019 Julie Ann Watson
Oenothera californica
© 2020 Mitchell Coleman
Oenothera californica
© 2015 Ron Vanderhoff

Oenothera elata ssp. hirsutissima    Evening primrose,  Hairy evening primrose,  Hooker's evening primrose
native
Perennial herb

ONAGRACEAE

Oenothera elata ssp. hirsutissima
© 2015 Bill Haley
Oenothera elata ssp. hirsutissima
© 2021 David Wolfson
Oenothera elata ssp. hirsutissima
© 2012 Steve Matson

Olea europaea    Olive
invasive non-native
Tree, Shrub

OLEACEAE

Olea europaea
© 2022 Donald Burk
Olea europaea
© 2021 Thomas Reyes
Olea europaea
© 2022 Ron Vanderhoff

Opuntia littoralis    Coast prickly pear,  Coastal pricklypear,  Western prickly pear
native
Shrub (stem succulent)

CACTACEAE

Opuntia littoralis
© 2019 Diane Etchison
Opuntia littoralis
© 2022 Ron Vanderhoff
Opuntia littoralis
© 2024 Shelly Marshall

Opuntia phaeacantha var. discata    Cactus apple,  Engelmann prickly pear
native
Shrub

CACTACEAE

Opuntia phaeacantha var. discata
© 2010 James M. Andre
Opuntia phaeacantha var. discata
© 2010 Zoya Akulova
Opuntia phaeacantha var. discata
© 2010 James M. Andre

Orcuttia californica    California orcutt grass
rare native
Annual grass

POACEAE

Orcuttia californica
© 2005 Jasmine J. Watts
Orcuttia californica
© 2013 Anna Bennett
Orcuttia californica
© 2005 Russell Huddleston

Orthocarpus densiflorus var. gracilis    Denseflower indian paintbrush,  Graceful owl's clover
native
Annual herb

OROBANCHACEAE

Orthocarpus densiflorus var. gracilis
© 2022 Ron Vanderhoff
Orthocarpus densiflorus var. gracilis
© 2022 Ron Vanderhoff
Orthocarpus densiflorus var. gracilis
© 2022 Ron Vanderhoff

Orthocarpus purpurascens var. pallidus    Exserted indian paintbrush,  Pale purple owlclover,  Purple owl's clover
native
Annual herb

OROBANCHACEAE

Orthocarpus purpurascens var. pallidus
© 2020 David Greenberger
Orthocarpus purpurascens var. pallidus
© 2019 Ron Vanderhoff
Orthocarpus purpurascens var. pallidus
© 2023 Ron Vanderhoff

Oxalis albicans ssp. californica    Californica wood sorrel
native
Perennial herb

OXALIDACEAE

Oxalis albicans ssp. californica
© 2019 Diane Etchison
Oxalis albicans ssp. californica
© 2020 Ron Vanderhoff
Oxalis albicans ssp. californica
© 2020 Diane Etchison

Oxalis corniculata    Creeping wood sorrel,  Creeping woodsorrel,  Yellow sorrel
invasive non-native
Perennial herb

OXALIDACEAE

Oxalis corniculata
© 2022 Donald Burk
Oxalis corniculata
© 2022 Ron Vanderhoff
Oxalis corniculata
© 2021 Ron Vanderhoff

Paeonia californica    California peony
native
Perennial herb

PAEONIACEAE

Paeonia californica
© 2024 Ron Vanderhoff
Paeonia californica
© 2023 Ron Vanderhoff
Paeonia californica
© 2019 Susan McDougall

Panicum capillare var. occidentale    Old witch grass,  Witchgrass
native
Annual grass

POACEAE

Panicum capillare var. occidentale
© 2022 Ron Vanderhoff
Panicum capillare var. occidentale
© 2022 Ron Vanderhoff
Panicum capillare var. occidentale
© 2022 Ron Vanderhoff

Parietaria hespera var. hespera    Rillita pellitory
native
Annual herb

URTICACEAE

Parietaria hespera var. hespera
© 2020 David Greenberger
Parietaria hespera var. hespera
© 2018 Ron Vanderhoff
Parietaria hespera var. hespera
© 2022 Matt Berger

Parthenocissus quinquefolia    Virginia creeper
non-native
Vine, Shrub

VITACEAE

Parthenocissus quinquefolia
© 2011 Ramona Robison
Parthenocissus quinquefolia
© 2023 Ron Vanderhoff
Parthenocissus quinquefolia
© 2023 Ron Vanderhoff

Paspalum dilatatum    Dallis grass,  Dallisgrass
non-native
Perennial grass

POACEAE

Paspalum dilatatum
© 2018 Ron Vanderhoff
Paspalum dilatatum
© 2017 Barbara Boethling
Paspalum dilatatum
© 2021 Ron Vanderhoff

Paspalum paspaloides    Knot grass,  Knotgrass
native
Perennial grass

POACEAE

Paspalum paspaloides
© 2011 Steve Matson
Paspalum paspaloides
© 2017 Ron Vanderhoff
Paspalum paspaloides
© 2017 Ron Vanderhoff

Pectocarya linearis ssp. ferocula    Sagebrush combseed,  Slender comb seed,  Slender pectocarya
native
Annual herb

BORAGINACEAE

Pectocarya linearis ssp. ferocula
© 2014 Steve Matson
Pectocarya linearis ssp. ferocula
© 2014 Steve Matson
Pectocarya linearis ssp. ferocula
© 2014 Steve Matson

Pedicularis densiflora    Warrior's plume,  Indian warrior
native
Perennial herb

OROBANCHACEAE

Pedicularis densiflora
© 2015 Dee Warenycia
Pedicularis densiflora
© 2019 Jason Mills
Pedicularis densiflora
© 2017 Joshua Borkowski

Pellaea andromedaefolia    Coffee cliffbrake,  Coffee fern
native
Fern

PTERIDACEAE

Pellaea andromedaefolia
© 2023 Steve Conger
Pellaea andromedaefolia
© 2021 Steve Matson
Pellaea andromedaefolia
© 2021 Mike Russler

Pellaea mucronata    Bird's foot fern,  Birdfoot cliffbrake,  Birdfoot fern
native
Fern

PTERIDACEAE

Pellaea mucronata
© 2012 Ron Vanderhoff
Pellaea mucronata
© 2022 Helen Hancock
Pellaea mucronata
© 2023 Julia Markey

Pennisetum setaceum    Crimson fountaingrass,  Fountaingrass
invasive non-native
Perennial grass

POACEAE

Pennisetum setaceum
© 2023 Ron Vanderhoff
Pennisetum setaceum
© 2021 Steve Matson
Pennisetum setaceum
© 2021 Steve Matson

Penstemon heterophyllus ssp. australis    Southern foothill penstemon
native
Perennial herb

PLANTAGINACEAE

Penstemon heterophyllus ssp. australis
© 2020 Ron Vanderhoff
Penstemon heterophyllus ssp. australis
© 2023 Ron Vanderhoff
Penstemon heterophyllus ssp. australis
© 2005 j. crossley

Penstemon spectabilis    Showy penstemon
native
Perennial herb

PLANTAGINACEAE

Penstemon spectabilis
© 2019 Matt Berger
Penstemon spectabilis
© 2009 Neal Kramer
Penstemon spectabilis
© 2022 Ron Vanderhoff

Phacelia brachyloba    Short lobed phacelia,  Shortlobe phacelia
native
Annual herb

HYDROPHYLLACEAE

Phacelia brachyloba
© 2018 Ron Vanderhoff
Phacelia brachyloba
© 2018 Ron Vanderhoff
Phacelia brachyloba
© 2019 Ron Vanderhoff

Phacelia cicutaria ssp. hispida    Caterpillar phacelia
native
Annual herb

HYDROPHYLLACEAE

Phacelia cicutaria ssp. hispida
© 2017 Steve Matson
Phacelia cicutaria ssp. hispida
© 2017 Steve Matson
Phacelia cicutaria ssp. hispida
© 2017 Steve Matson

Phacelia distans    Common phacelia,  Distant phacelia,  Wild heliotrope
native
Annual herb

HYDROPHYLLACEAE

Phacelia distans
© 2014 Steve Matson
Phacelia distans
© 2014 Steve Matson
Phacelia distans
© 2022 Ron Vanderhoff

Phacelia grandiflora    Giant flowered phacelia,  Large flowered phacelia,  Largeflower phacelia
native
Annual herb

HYDROPHYLLACEAE

Phacelia grandiflora
© 2014 Ron Vanderhoff
Phacelia grandiflora
© 2019 Ron Vanderhoff
Phacelia grandiflora
© 2019 Ron Vanderhoff

Phacelia imbricata ssp. patula    Imbricate phacelia
native
Perennial herb

HYDROPHYLLACEAE

Phacelia imbricata ssp. patula
© 2020 Bob Sill
Phacelia imbricata ssp. patula
© 2019 Bonnie Nickel
Phacelia imbricata ssp. patula
© 2019 Matt Berger

Phacelia minor    California bluebell,  Wild canterbury bells
native
Annual herb

HYDROPHYLLACEAE

Phacelia minor
© 2020 David Greenberger
Phacelia minor
© 2019 Matt Berger
Phacelia minor
© 2020 stephen montgomery

Phacelia suffrutescens    Branching phacelia
native
Perennial herb

HYDROPHYLLACEAE

Phacelia suffrutescens
© 2005 Steve Matson
Phacelia suffrutescens
© 2022 Rosalind Helfand
Phacelia suffrutescens
© 2020 Ron Vanderhoff

Phalaris aquatica    Bulbous canarygrass,  Harding grass
invasive non-native
Perennial grass

POACEAE

Phalaris aquatica
© 2018 Thomas Reyes
Phalaris aquatica
© 2021 Lenihan Mazur
Phalaris aquatica
© 2022 Lenihan Mazur

Phalaris caroliniana    Carolina canarygrass
non-native
Annual grass

POACEAE

Phalaris caroliniana
© 2022 Chris McDonald

Phalaris minor    Little seed canarygrass,  Littleseed canarygrass,  Mediterranean canarygrass
non-native
Annual grass

POACEAE

Phalaris minor
© 2014 Steve Matson
Phalaris minor
© 2014 Steve Matson
Phalaris minor
© 2014 Steve Matson

Pholistoma auritum    Blue fiestaflower,  Fiesta flower
native
Annual herb

HYDROPHYLLACEAE

Pholistoma auritum
© 2014 Steve Matson
Pholistoma auritum
© 2014 Steve Matson
Pholistoma auritum
© 2014 Steve Matson

native
Shrub (parasitic)

VISCACEAE

Phoradendron tomentosum ssp. macrophyllum
© 2021 Ron Vanderhoff
Phoradendron tomentosum ssp. macrophyllum
© 2021 Ron Vanderhoff
Phoradendron tomentosum ssp. macrophyllum
© 2021 Ron Vanderhoff

native
Shrub (parasitic)

VISCACEAE

Phoradendron villosum ssp. villosum
© 2022 David popp
Phoradendron villosum ssp. villosum
© 2020 R.A. Chasey
Phoradendron villosum ssp. villosum
© 2021 R.A. Chasey

Picris echioides    Bristly ox-tongue
invasive non-native
Annual, Perennial herb

ASTERACEAE

Picris echioides
© 2016 Hayley Ross
Picris echioides
© 2019 Rachelle Gray
Picris echioides
© 2012 Elizabeth Brusati

Pilularia americana    American pillwort
native
Fern

MARSILEACEAE

Pilularia americana
© 2017 Ron Vanderhoff
Pilularia americana
© 2017 Ron Vanderhoff
Pilularia americana
© 2022 Matt Berger

Pityrogramma triangularis    Gold back fern
native
Fern

PTERIDACEAE

Pityrogramma triangularis
© 2008 Steve Matson
Pityrogramma triangularis
© 2008 Steve Matson
Pityrogramma triangularis
© 2019 Gary McDonald

Plagiobothrys acanthocarpus    Adobe allocarya,  Adobe popcornflower
native
Annual herb

BORAGINACEAE

Plagiobothrys acanthocarpus
© 2017 Steve Matson
Plagiobothrys acanthocarpus
© 2017 Steve Matson
Plagiobothrys acanthocarpus
© 2024 Catherine Chang

Plagiobothrys arizonicus var. arizonicus    Arizona popcorn flower,  Arizona popcornflower
native
Annual herb

BORAGINACEAE

Plagiobothrys arizonicus var. arizonicus
© 2020 Steve Matson
Plagiobothrys arizonicus var. arizonicus
© 2020 Steve Matson
Plagiobothrys arizonicus var. arizonicus
© 2020 Steve Matson

Plagiobothrys fulvus var. campestris    Common popcorn flower,  Fulvous popcornflower,  Tawny popcorn flower
native
Annual herb

BORAGINACEAE

Plagiobothrys fulvus var. campestris
© 2016 Steve Matson
Plagiobothrys fulvus var. campestris
© 2016 Steve Matson
Plagiobothrys fulvus var. campestris
© 2016 Steve Matson

Plagiobothrys nothofulvus    Rusty haired popcorn flower,  Rusty popcorn flower,  Rusty popcornflower
native
Annual herb

BORAGINACEAE

Plagiobothrys nothofulvus
© 2011 Steve Matson
Plagiobothrys nothofulvus
© 2011 Steve Matson
Plagiobothrys nothofulvus
© 2015 Steve Matson

Plagiobothrys undulatus    Coast allocarya
native
Annual herb

BORAGINACEAE

Plagiobothrys undulatus
© 2012 Terrence Gosliner
Plagiobothrys undulatus
© 2024 Ron Vanderhoff
Plagiobothrys undulatus
© 2006 Steve Matson

Plantago bigelovii ssp. bigelovii    Annual coast plantago,  Coastal plantain,  Long leaf plantain
native
Annual herb

PLANTAGINACEAE

Plantago bigelovii ssp. bigelovii
© 2017 Barbara Boethling
Plantago bigelovii ssp. bigelovii
© 2019 Ron Vanderhoff
Plantago bigelovii ssp. bigelovii
© 2020 Ron Vanderhoff

Plantago erecta ssp. erecta    California plantain,  Dotseed plantain,  Foothill plantain
native
Annual herb

PLANTAGINACEAE

Plantago erecta ssp. erecta
© 2008 Steve Matson
Plantago erecta ssp. erecta
© 2022 Steve Matson
Plantago erecta ssp. erecta
© 2022 Steve Matson

Plantago lanceolata    English plantain,  Narrow leaved plantain,  Ribgrass
invasive non-native
Perennial herb

PLANTAGINACEAE

Plantago lanceolata
© 2017 Gary McDonald
Plantago lanceolata
© 2019 Joe Engelbrecht
Plantago lanceolata
© 2021 Ken Lunders

Plantago major    Common plantain
non-native
Perennial herb

PLANTAGINACEAE

Plantago major
© 2019 Bob Sweatt
Plantago major
© 2022 Diana Wahl
Plantago major
© 2020 Ryan Carle

Platanus racemosa    California sycamore,  Western sycamore
native
Tree

PLATANACEAE

Platanus racemosa
© 2021 Ron Vanderhoff
Platanus racemosa
© 2018 Ron Vanderhoff
Platanus racemosa
© 2019 Rachelle Gray

Platystemon californicus    Cream cups,  Creamcups
native
Annual herb

PAPAVERACEAE

Platystemon californicus
© 2019 Diane Etchison
Platystemon californicus
© 2022 John L. Thompson
Platystemon californicus
© 2022 John L. Thompson

Plectritis ciliosa ssp. insignis    Long spurred plectritis,  Longspur seablush
native
Annual herb

VALERIANACEAE

Plectritis ciliosa ssp. insignis
© 2022 Steve Matson
Plectritis ciliosa ssp. insignis
© 2005 Steve Matson
Plectritis ciliosa ssp. insignis
© 2022 Steve Matson

Poa annua    Annual blue grass,  Annual bluegrass
non-native
Annual grass

POACEAE

Poa annua
© 2021 Ron Vanderhoff
Poa annua
© 2022 John Rawlings
Poa annua
© 2015 Richard Chasey

Poa bulbosa    Bulbous blue grass,  Bulbous bluegrass
non-native
Perennial grass

POACEAE

Poa bulbosa
© 2020 Julie A. Kierstead
Poa bulbosa
© 2019 Stephany Dery
Poa bulbosa
© 2020 Thomas Reyes

Poa secunda    One sided blue grass,  Pine bluegrass,  Sandberg bluegrass
native
Perennial grass

POACEAE

Poa secunda
© 2019 Rachelle Gray
Poa secunda
© 2019 Paul Aigner
Poa secunda
© 2020 Paul Aigner

Polycarpon tetraphyllum    Four leaved all seed,  Four leaved allseed,  Four leaved polycarp
non-native
Annual herb

CARYOPHYLLACEAE

Polycarpon tetraphyllum
© 2020 Ron Vanderhoff
Polycarpon tetraphyllum
© 2019 Ron Vanderhoff
Polycarpon tetraphyllum
© 2020 Ron Vanderhoff

Polygala cornuta ssp. fishiae    Fish's Milkwort
native
Shrub

POLYGALACEAE

Polygala cornuta ssp. fishiae
© 2020 Aaron Echols
Polygala cornuta ssp. fishiae
© 2021 Ron Vanderhoff
Polygala cornuta ssp. fishiae
© 2021 Ron Vanderhoff

Polygonum argyrocoleon    Persian knotweed,  Silver sheath knotweed,  Silversheath knotweed
non-native
Annual herb

POLYGONACEAE

Polygonum argyrocoleon
© 2020 Ron Vanderhoff
Polygonum argyrocoleon
© 2018 Ron Vanderhoff
Polygonum argyrocoleon
© 2020 Ron Vanderhoff

Polygonum aviculare    Prostrate knotweed
non-native
Annual, Perennial herb

POLYGONACEAE

Polygonum aviculare
© 2023 Ron Vanderhoff
Polygonum aviculare
© 2023 Cynthia Powell
Polygonum aviculare
© 2021 Ron Vanderhoff

Polygonum lapathifolium    Common knotweed
native
Annual herb

POLYGONACEAE

Polygonum lapathifolium
© 2020 Ron Vanderhoff
Polygonum lapathifolium
© 2017 Ron Vanderhoff
Polygonum lapathifolium
© 2020 Ron Vanderhoff

Polygonum punctatum    Dotted smartweed
native
Perennial herb

POLYGONACEAE

Polygonum punctatum
© 2018 Ron Vanderhoff
Polygonum punctatum
© 2018 Ron Vanderhoff
Polygonum punctatum
© 2022 Helen Hancock

Polypodium californicum    California polypody
native
Fern

POLYPODIACEAE

Polypodium californicum
© 2020 Ron Vanderhoff
Polypodium californicum
© 2021 Ron Vanderhoff
Polypodium californicum
© 2023 Keir Morse

Polypogon monspeliensis    Annual beard grass,  Rabbitsfoot grass
invasive non-native
Annual grass

POACEAE

Polypogon monspeliensis
© 2008 Steve Matson
Polypogon monspeliensis
© 2014 Steve Matson
Polypogon monspeliensis
© 2008 Steve Matson

Populus fremontii ssp. fremontii    Fremont cottonwood
native
Tree

SALICACEAE

Populus fremontii ssp. fremontii
© 2019 Stella Yang
Populus fremontii ssp. fremontii
© 2020 David popp
Populus fremontii ssp. fremontii
© 2020 Susan McDougall

Populus trichocarpa ssp. trichocarpa    Black cottonwood
native
Tree

SALICACEAE

Populus trichocarpa ssp. trichocarpa
© 2019 Ron Vanderhoff
Populus trichocarpa ssp. trichocarpa
© 2012 Steve Matson
Populus trichocarpa ssp. trichocarpa
© 2012 Steve Matson

Porophyllum gracile    Odora,  Slender poreleaf
native
Perennial herb

ASTERACEAE

Porophyllum gracile
© 2019 Matt Berger
Porophyllum gracile
© 2008 Steve Matson
Porophyllum gracile
© 2023 Ron Vanderhoff

Portulaca oleracea    Common purslane,  Little hogweed,  Purslane
non-native
Annual herb

PORTULACACEAE

Portulaca oleracea
© 2020 Ron Vanderhoff
Portulaca oleracea
© 2022 Ron Vanderhoff
Portulaca oleracea
© 2020 R.A. Chasey

Potentilla glandulosa ssp. glandulosa    Sticky cinquefoil
native
Perennial herb

ROSACEAE

Potentilla glandulosa ssp. glandulosa
© 2020 Diane Etchison
Potentilla glandulosa ssp. glandulosa
© 2017 Steve Matson
Potentilla glandulosa ssp. glandulosa
© 2021 Mike Russler

Potomogeton foliosus    Small Tree-Mallow


Potomogeton pectinatus    Small Tree-Mallow


Potomogeton pusillus    Small Tree-Mallow


Prunus emarginata    Bitter cherry
native
Tree, Shrub

ROSACEAE

Prunus emarginata
© 2020 Belinda Lo
Prunus emarginata
© 2004 Steve Matson
Prunus emarginata
© 2006 Steve Matson

Prunus ilicifolia ssp. ilicifolia    Holly leaf cherry,  Hollyleaf cherry
native
Tree, Shrub

ROSACEAE

Prunus ilicifolia ssp. ilicifolia
© 2018 David Greenberger
Prunus ilicifolia ssp. ilicifolia
© 2019 Ron Vanderhoff
Prunus ilicifolia ssp. ilicifolia
© 2020 James Gonsman

Psilocarphus brevissimus    Short woollyheads,  Woolly marbles
native
Annual herb

ASTERACEAE

Psilocarphus brevissimus
© 2018 David Greenberger
Psilocarphus brevissimus
© 2020 R.A. Chasey
Psilocarphus brevissimus
© 2022 Bob Sweatt

Psilocarphus tenellus    Slender woolly marbles,  Slender woollyheads
native
Annual herb

ASTERACEAE

Psilocarphus tenellus
© 2006 Steve Matson
Psilocarphus tenellus
© 2006 Steve Matson
Psilocarphus tenellus
© 2018 Ron Vanderhoff

Psoralea macrostachya    California hemp,  Large leather root
native
Perennial herb

FABACEAE

Psoralea macrostachya
© 2020 Ron Vanderhoff
Psoralea macrostachya
© 2022 Natalie McNear
Psoralea macrostachya
© 2021 Julie King

Pteridium aquilinum    Western brackenfern
native
Fern

DENNSTAEDTIACEAE

Pteridium aquilinum
© 2019 Ron Vanderhoff
Pteridium aquilinum
© 2019 Cynthia Powell
Pteridium aquilinum
© 2020 Cara Wilcox

Pterostegia drymarioides    Fairy mist,  Woodland threadstem
native
Annual herb

POLYGONACEAE

Pterostegia drymarioides
© 2016 Steve Matson
Pterostegia drymarioides
© 2016 Steve Matson
Pterostegia drymarioides
© 2005 Steve Matson

Quercus agrifolia var. oxyadenia    Coast live oak,  Sharpacorn oak
native
Tree

FAGACEAE

Quercus agrifolia var. oxyadenia
© 2017 Michelle Tollett
Quercus agrifolia var. oxyadenia
© 2020 David Greenberger
Quercus agrifolia var. oxyadenia
© 2009 Anna Bennett

Quercus dumosa    Coastal sage scrub oak,  Nuttall's scrub oak
rare native
Shrub

FAGACEAE

Quercus dumosa
© 2023 Ron Vanderhoff
Quercus dumosa
© 2022 Ron Vanderhoff
Quercus dumosa
© 2012 Ron Vanderhoff

Quercus dumosa X engelmannii    Small Tree-Mallow


Quercus engelmannii    Engelmann oak
rare native
Tree

FAGACEAE

Quercus engelmannii
© 2022 Ron Vanderhoff
Quercus engelmannii
© 2020 Ron Vanderhoff
Quercus engelmannii
© 2020 Ron Vanderhoff

Quercus wislizenii var. frutescens    Interior live oak,  chapparal oak
native
Tree, Shrub

FAGACEAE

Quercus wislizenii var. frutescens
© 2019 Ron Vanderhoff
Quercus wislizenii var. frutescens
© 2019 Ron Vanderhoff
Quercus wislizenii var. frutescens
© 2019 Barbara Brydolf

Rafinesquia californica    California chicory,  California plumseed
native
Annual herb

ASTERACEAE

Rafinesquia californica
© 2019 David Greenberger
Rafinesquia californica
© 2021 Ron Vanderhoff
Rafinesquia californica
© 2017 Steve Matson

Ranunculus aquatilis var. capillaceus    white water butter cup
native
Perennial herb (aquatic)

RANUNCULACEAE

Ranunculus aquatilis var. capillaceus
© 2016 Ken Lunders
Ranunculus aquatilis var. capillaceus
© 2007 Steve Matson
Ranunculus aquatilis var. capillaceus
© 2022 Jonathan Widdicombe

native
Perennial herb

RANUNCULACEAE

Ranunculus californicus ssp. californicus
© 2016 Steve Matson
Ranunculus californicus ssp. californicus
© 2016 Steve Matson
Ranunculus californicus ssp. californicus
© 2016 Steve Matson

native
Perennial herb

RANUNCULACEAE

Ranunculus cymbalaria ssp. saximontanus
© 2013 Steve Matson
Ranunculus cymbalaria ssp. saximontanus
© 2013 Steve Matson
Ranunculus cymbalaria ssp. saximontanus
© 2013 Steve Matson

Raphanus sativus    Cultivated radish,  Jointed charlock,  Wild radish
invasive non-native
Annual, Biennial herb

BRASSICACEAE

Raphanus sativus
© 2017 Lisa Miller
Raphanus sativus
© 2020 Ron Vanderhoff
Raphanus sativus
© 2023 Julia Markey

Rhamnus californica ssp. californica    California coffeeberry
native
Shrub

RHAMNACEAE

Rhamnus californica ssp. californica
© 2015 Steve Matson
Rhamnus californica ssp. californica
© 2015 Steve Matson
Rhamnus californica ssp. californica
© 2019 Ron Vanderhoff

Rhamnus crocea    Redberry buckthorn
native
Shrub

RHAMNACEAE

Rhamnus crocea
© 2011 Michael Mitchell
Rhamnus crocea
© 2022 Ron Vanderhoff
Rhamnus crocea
© 2019 Ron Vanderhoff

Rhamnus ilicifolia    Evergreen buckthorn,  Hollyleaf redberry
native
Shrub

RHAMNACEAE

Rhamnus ilicifolia
© 2016 Steve Matson
Rhamnus ilicifolia
© 2016 Steve Matson
Rhamnus ilicifolia
© 2006 Steve Matson

Rhododendron occidentale    Western azalea
native
Tree, Shrub

ERICACEAE

Rhododendron occidentale
© 2019 David Greenberger
Rhododendron occidentale
© 2015 Steve Matson
Rhododendron occidentale
© 2020 Julie A. Kierstead

Rhus ovata    Sugar bush,  Sugar sumac
native
Shrub

ANACARDIACEAE

Rhus ovata
© 2020 Bryant Baker
Rhus ovata
© 2020 Bryant Baker
Rhus ovata
© 2019 Bryant Baker

Rhus trilobata    Fragrant sumac,  Skunk Bush
native
Shrub

ANACARDIACEAE

Rhus trilobata
© 2018 Steve Matson
Rhus trilobata
© 2018 Steve Matson
Rhus trilobata
© 2018 Steve Matson

Ribes indecorum    White flowering currant,  Whiteflower currant
native
Shrub

GROSSULARIACEAE

Ribes indecorum
© 2020 Diane Etchison
Ribes indecorum
© 2020 Diane Etchison
Ribes indecorum
© 2020 Diane Etchison

Ricinus communis    Castor bean,  Castorbean
invasive non-native
Shrub

EUPHORBIACEAE

Ricinus communis
© 2017 Henry DiRocco
Ricinus communis
© 2020 Aaron Echols
Ricinus communis
© 2022 Ron Vanderhoff

Rosa californica    California wild rose,  California wildrose
native
Shrub

ROSACEAE

Rosa californica
© 2022 Suzanne L. Weakley
Rosa californica
© 2022 Suzanne L. Weakley
Rosa californica
© 2021 Sue Graue

Rubus procerus    Himalayan blackberry,  black berry,  Armenian blackberry
invasive non-native
Shrub

ROSACEAE

Rubus procerus
© 2014 James Gonsman
Rubus procerus
© 2020 Julie A. Kierstead
Rubus procerus
© 2018 Richard Spjut

Rubus ursinus    California blackberry,  Pacific blackberry
native
Vine, Shrub

ROSACEAE

Rubus ursinus
© 2018 Ken Lunders
Rubus ursinus
© 2019 Ron Vanderhoff
Rubus ursinus
© 2015 Kelli Kallenborn

Rumex acetosella    Common sheep sorrel
invasive non-native
Perennial herb

POLYGONACEAE

Rumex acetosella
© 2017 Gary McDonald
Rumex acetosella
© 2008 Steve Matson
Rumex acetosella
© 2019 Patrick Furtado

Rumex conglomeratus    Clustered dock,  Green dock
non-native
Perennial herb

POLYGONACEAE

Rumex conglomeratus
© 2020 Ron Vanderhoff
Rumex conglomeratus
© 2023 Ron Vanderhoff
Rumex conglomeratus
© 2023 Ron Vanderhoff

Rumex crispus    Curly dock,  Curly leaved dock,  Rhubarb
invasive non-native
Perennial herb

POLYGONACEAE

Rumex crispus
© 2018 Tim Lewis
Rumex crispus
© 2019 Diane Etchison
Rumex crispus
© 2023 Ron Vanderhoff

Rumex salicifolius    Willow dock,  Willow leaved dock
native
Perennial herb

POLYGONACEAE

Rumex salicifolius
© 2023 Ron Vanderhoff
Rumex salicifolius
© 2012 Gary McDonald
Rumex salicifolius
© 2012 Gary McDonald

Sagina occidentalis    Western pearlwort
native
Annual herb

CARYOPHYLLACEAE

Sagina occidentalis
© 2019 Ron Vanderhoff
Sagina occidentalis
© 2019 Ron Vanderhoff
Sagina occidentalis
© 2019 Ron Vanderhoff

Salix gooddingii var. variabilis    Goodding's black willow,  Goodding's willow,  Gooding's willow
native
Tree

SALICACEAE

Salix gooddingii var. variabilis
© 2020 Ron Vanderhoff
Salix gooddingii var. variabilis
© 2021 Richard Spjut
Salix gooddingii var. variabilis
© 2020 Ron Vanderhoff

native
Tree, Shrub

SALICACEAE

Salix hindsiana var. leucodendroides
© 2022 Robbie Lee
Salix hindsiana var. leucodendroides
© 2017 Dee Shea Himes
Salix hindsiana var. leucodendroides
© 02/22/2022 John Rawlings

Salix laevigata var. araquipa    Polished willow,  Red willow
native
Tree

SALICACEAE

Salix laevigata var. araquipa
© 2017 Steve Matson
Salix laevigata var. araquipa
© 2019 Barbara Brydolf
Salix laevigata var. araquipa
© 2022 Mark Gary

Salix lasiandra    Pacific willow
native
Tree

SALICACEAE

Salix lasiandra
© 2020 Ron Vanderhoff
Salix lasiandra
© 2018 Ron Vanderhoff
Salix lasiandra
© 2021 Richard Spjut

Salix lasiolepis    Arroyo willow
native
Tree, Shrub

SALICACEAE

Salix lasiolepis
© 2022 Ron Vanderhoff
Salix lasiolepis
© 2022 Ron Vanderhoff
Salix lasiolepis
© 2020 Steve Matson

Salsola australis    Russian thistle
non-native
Annual herb

CHENOPODIACEAE

Salsola australis
© 2018 Ron Vanderhoff
Salsola australis
© 2017 James Bailey
Salsola australis
© 2019 Ron Vanderhoff

Salvia apiana    White sage
native
Shrub

LAMIACEAE

Salvia apiana
© 2019 Hannah Garcia
Salvia apiana
© 2019 Ron Vanderhoff
Salvia apiana
© 2020 Ron Vanderhoff

Salvia clevelandii    Cleveland sage,  Fragrant sage
native
Shrub

LAMIACEAE

Salvia clevelandii
© 2019 Diane Etchison
Salvia clevelandii
© 2022 Ron Vanderhoff
Salvia clevelandii
© 2022 Ron Vanderhoff

native
Annual herb

LAMIACEAE

Salvia columbariae ssp. columbariae
© 2020 Ron Vanderhoff
Salvia columbariae ssp. columbariae
© 2022 Mike Russler
Salvia columbariae ssp. columbariae
© 2022 Mike Russler

Salvia mellifera    Black sage
native
Shrub

LAMIACEAE

Salvia mellifera
© 2017 Steve Matson
Salvia mellifera
© 2022 Suzanne L. Weakley
Salvia mellifera
© 2019 Diane Etchison

Sambucus mexicana    Blue elderberry
native
Tree, Shrub

VIBURNACEAE

Sambucus mexicana
© 2021 Mike Russler
Sambucus mexicana
© 2020 Diane Etchison
Sambucus mexicana
© 2022 El Byrne

Samolus parviflorus    Water pimpernel
native
Perennial herb

THEOPHRASTACEAE

Samolus parviflorus
© 2023 Ron Vanderhoff
Samolus parviflorus
© 2022 Catherine Chang
Samolus parviflorus
© 2022 Catherine Chang

Sanicula arguta    Sharp toothed sanicle,  Sharp toothed snakeroot,  Sharptooth blacksnakeroot
native
Perennial herb

APIACEAE

Sanicula arguta
© 2006 Steve Matson
Sanicula arguta
© 2006 Steve Matson
Sanicula arguta
© 2006 Steve Matson

Sanicula bipinnatifida    Purple sanicle,  Snakeroot,  Purple Sanicle, Shoe Buttons
native
Perennial herb

APIACEAE

Sanicula bipinnatifida
© 2019 Diane Etchison
Sanicula bipinnatifida
© 2018 Gary McDonald
Sanicula bipinnatifida
© 2021 Robin Carter

Satureja chandleri    San miguel savory
rare native
Perennial herb

LAMIACEAE

Satureja chandleri
© 2020 Diane Etchison
Satureja chandleri
© 2018 Ron Vanderhoff
Satureja chandleri
© 2021 Ron Vanderhoff

Saxifraga californica    Greene's saxifrage
native
Perennial herb

SAXIFRAGACEAE

Saxifraga californica
© 2016 Steve Matson
Saxifraga californica
© 2016 Steve Matson
Saxifraga californica
© 2016 Steve Matson

Schinus molle    Peruvian pepper tree,  Peruvian peppertree
invasive non-native
Tree

ANACARDIACEAE

Schinus molle
© 2021 stephen rosenthal
Schinus molle
© 2017 William McCarey
Schinus molle
© 2023 Ron Vanderhoff

Schismus barbatus    Common mediterranean grass,  Old han schismus
invasive non-native
Annual grass

POACEAE

Schismus barbatus
© 2022 Ron Vanderhoff
Schismus barbatus
© 2022 Ron Vanderhoff
Schismus barbatus
© 2022 Ron Vanderhoff

Scirpus acutus    Hardstem bulrush
native
Perennial grasslike herb

CYPERACEAE

Scirpus acutus
© 2015 Steve Matson
Scirpus acutus
© 2015 Steve Matson
Scirpus acutus
© 2015 Steve Matson

Scirpus californicus    California bulrush
native
Perennial grasslike herb

CYPERACEAE

Scirpus californicus
© 2022 John Rawlings
Scirpus californicus
© 2022 John Rawlings
Scirpus californicus
© 2021 Ron Vanderhoff

Scirpus microcarpus    Panicled bulrush,  Small fruited bulrush
native
Perennial grasslike herb

CYPERACEAE

Scirpus microcarpus
© 2022 Doug Allshouse
Scirpus microcarpus
© 2008 Steve Matson
Scirpus microcarpus
© 2013 Ron Vanderhoff

Scrophularia californica ssp. floribunda    California bee plant,  California figwort
native
Perennial herb

SCROPHULARIACEAE

Scrophularia californica ssp. floribunda
© 2020 Bob Sweatt
Scrophularia californica ssp. floribunda
© 2006 Steve Matson
Scrophularia californica ssp. floribunda
© 2019 Cynthia Powell

Scutellaria tuberosa ssp. australis    Danny's skullcap,  Scullcap
native
Perennial herb

LAMIACEAE

Scutellaria tuberosa ssp. australis
© 2006 Steve Matson
Scutellaria tuberosa ssp. australis
© 2006 Steve Matson
Scutellaria tuberosa ssp. australis
© 2006 Steve Matson

Secale cereale    Cereal rye
non-native
Annual grass

POACEAE

Secale cereale
© 2022 Joy England
Secale cereale
© 2011 Steve Matson
Secale cereale
© 2008 Louis-M. Landry

Selaginella bigelovii    Bigelow's moss fern,  Bigelow's spike moss,  Bushy spikemoss
Selaginella bigelovii
© 2019 Ron Vanderhoff
Selaginella bigelovii
© 2019 Ron Vanderhoff
Selaginella bigelovii
© 2018 Ron Vanderhoff

Senecio douglasii var. douglasii    Bush groundsel,  Bush senecio,  Douglas' groundsel
native
Shrub

ASTERACEAE

Senecio douglasii var. douglasii
© 2018 Richard Spjut
Senecio douglasii var. douglasii
© 2019 Ron Vanderhoff
Senecio douglasii var. douglasii
© 2023 Helen Hancock

Senecio vulgaris    Common groundsel,  Old man in the spring,  Old man of spring
non-native
Annual herb

ASTERACEAE

Senecio vulgaris
© 2017 Barbara Boethling
Senecio vulgaris
© 2019 Ron Vanderhoff
Senecio vulgaris
© 2021 Toni Corelli

Setaria geniculata    Marsh bristlegrass
native
Perennial grass

POACEAE

Setaria geniculata
© 2018 Ron Vanderhoff
Setaria geniculata
© 2019 Ron Vanderhoff
Setaria geniculata
© 2023 Donald Burk

Setaria viridis    Green bristlegrass,  Green foxtail
non-native
Annual grass

POACEAE

Setaria viridis
© 2017 Ron Vanderhoff
Setaria viridis
© 2012 Zoya Akulova-Barlow
Setaria viridis
© 2021 David popp

Sidalcea malvaeflora ssp. sparsifolia    Checker bloom,  Checker mallow,  Dwarf checkerbloom
native
Perennial herb

MALVACEAE

Sidalcea malvaeflora ssp. sparsifolia
© 2022 David Strauch
Sidalcea malvaeflora ssp. sparsifolia
© 2018 Sheila Lodge
Sidalcea malvaeflora ssp. sparsifolia
© 2022 Suzanne L. Weakley

Silene antirrhina    Sleepy catch fly,  Sleepy catchfly,  Sleepy silene
native
Annual herb

CARYOPHYLLACEAE

Silene antirrhina
© 2019 Ken Hickman
Silene antirrhina
© 2019 Ken Hickman
Silene antirrhina
© 2023 Matt Berger

Silene gallica    Common catchfly,  Windmill pink
non-native
Annual herb

CARYOPHYLLACEAE

Silene gallica
© 2019 Mary Wloch
Silene gallica
© 2017 Gary McDonald
Silene gallica
© 2019 Gary McDonald

Silene laciniata ssp. major    Cardinal catchfly
native
Perennial herb

CARYOPHYLLACEAE

Silene laciniata ssp. major
© 2020 David Greenberger
Silene laciniata ssp. major
© 2023 Ron Vanderhoff
Silene laciniata ssp. major
© 2023 Ron Vanderhoff

Silybum marianum    Blessed milkthistle,  Milk thistle
invasive non-native
Annual, Perennial herb

ASTERACEAE

Silybum marianum
© 2020 Nancy Hamlett
Silybum marianum
© 2019 Marisa Persaud
Silybum marianum
© 2018 Angelique Herman

Sisymbrium altissimum    Tall tumblemustard,  Tumble mustard,  Tumbling mustard
non-native
Annual herb

BRASSICACEAE

Sisymbrium altissimum
© 2019 Ron Vanderhoff
Sisymbrium altissimum
© 2020 Ron Vanderhoff
Sisymbrium altissimum
© 2020 Ron Vanderhoff

Sisymbrium officinale    Hedge mustard,  Hedgemustard
non-native
Annual herb

BRASSICACEAE

Sisymbrium officinale
© 2021 Ann Garside
Sisymbrium officinale
© 2022 Julian Geoghegan
Sisymbrium officinale
© 2021 Ron Vanderhoff

Sisyrinchium bellum    Western blue eyed grass
native
Perennial herb

IRIDACEAE

Sisyrinchium bellum
© 2024 Steve Conger
Sisyrinchium bellum
© 2024 Ron Vanderhoff
Sisyrinchium bellum
© 2019 Stacie Wolny

Sitanion hystrix    Squirrel tail grass
native
Perennial grass

POACEAE

Sitanion hystrix
© 2020 Susan McDougall
Sitanion hystrix
© 2020 Susan McDougall
Sitanion hystrix
© 2012 Dylan Neubauer

Sitanion jubatum    Big squirreltail grass
native
Perennial grass

POACEAE

Sitanion jubatum
© 2019 Ron Vanderhoff
Sitanion jubatum
© 2023 Helen Hancock
Sitanion jubatum
© 2021 Denise Defreese

Solanum americanum    American black nightshade,  Common nightshade,  Small flowered nightshade
native
Annual, Perennial herb

SOLANACEAE

Solanum americanum
© 2014 Steve Matson
Solanum americanum
© 2019 Gary McDonald
Solanum americanum
© 2021 David Wolfson

Solanum douglasii    Douglas' nightshade,  Greenspot nightshade
native
Perennial herb

SOLANACEAE

Solanum douglasii
© 2006 Steve Matson
Solanum douglasii
© 2006 Steve Matson
Solanum douglasii
© 2006 Steve Matson

Solanum xanti var. xanti    Chaparral nightshade,  Nightshade,  Purple nightshade
native
Perennial herb, Shrub

SOLANACEAE

Solanum xanti var. xanti
© 2008 Steve Matson
Solanum xanti var. xanti
© 2008 Steve Matson
Solanum xanti var. xanti
© 2008 Steve Matson

Solidago californica    California goldenrod,  Oreja de liebre
native
Perennial herb

ASTERACEAE

Solidago californica
© 2013 Steve Matson
Solidago californica
© 2008 Steve Matson
Solidago californica
© 2008 Steve Matson

Sonchus asper    Spiny sowthistle
non-native
Annual herb

ASTERACEAE

Sonchus asper
© 2010 Michael Mitchell
Sonchus asper
© 2020 Julie A. Kierstead
Sonchus asper
© 2017 MCOSD Restoration Crew

Sonchus oleraceus    Common sow thistle,  Common sowthistle,  Sow thistle
non-native
Annual herb

ASTERACEAE

Sonchus oleraceus
© 2019 Diane Etchison
Sonchus oleraceus
© 2015 Jesse Rorabaugh
Sonchus oleraceus
© 2024 Ron Vanderhoff

Sorghum halepense    Johnsongrass
invasive non-native
Perennial grass

POACEAE

Sorghum halepense
© 2014 Robert F Norris
Sorghum halepense
© 2019 Jennifer Mo
Sorghum halepense
© 2020 Julie A. Kierstead

Sparganium eurycarpum    Broadfruit bur reed
native
Perennial herb

TYPHACEAE

Sparganium eurycarpum
© 2020 Ron Vanderhoff
Sparganium eurycarpum
© 2020 Ron Vanderhoff
Sparganium eurycarpum
© 2020 Ron Vanderhoff

Spartium junceum    Gorse,  Spanish broom
invasive non-native
Shrub

FABACEAE

Spartium junceum
© 2020 Ron Vanderhoff
Spartium junceum
© 2006 Jennifer Naegele
Spartium junceum
© 2021 Mary Herr

Spergularia bocconii    Small Tree-Mallow


Stachys rigida ssp. rigida    Rough hedgenettle
native
Perennial herb

LAMIACEAE

Stachys rigida ssp. rigida
© 2014 Steve Matson
Stachys rigida ssp. rigida
© 2014 Steve Matson
Stachys rigida ssp. rigida
© 2014 Steve Matson

Stellaria media    Chickweed
non-native
Annual herb

CARYOPHYLLACEAE

Stellaria media
© 2018 Gary McDonald
Stellaria media
© 2018 Gary McDonald
Stellaria media
© 2015 Diane Etchison

Stephanomeria virgata    Rod wirelettuce,  Tall stephanomeria,  Twiggy wreath plant
native
Annual herb

ASTERACEAE

Stephanomeria virgata
© 2019 Steven M Norris
Stephanomeria virgata
© 2022 Helen Hancock
Stephanomeria virgata
© 2019 Steven M Norris

Stipa cernua    Nodding needle grass
native
Perennial grass

POACEAE

Stipa cernua
© 2018 Liz Block
Stipa cernua
© 2022 Ron Vanderhoff
Stipa cernua
© 2022 Dianne Lake

Stipa coronata    Crested needle grass
native
Perennial grass

POACEAE

Stipa coronata
© 2020 Ron Vanderhoff
Stipa coronata
© 2022 Ron Vanderhoff
Stipa coronata
© 2019 Rachelle Gray

Stipa lepida    Foothill needle grass
native
Perennial grass

POACEAE

Stipa lepida
© 2017 Gary McDonald
Stipa lepida
© 2023 Ron Vanderhoff
Stipa lepida
© 2017 Gary McDonald

Stipa pulchra    Purple needle grass
native
Perennial grass

POACEAE

Stipa pulchra
© 2019 Michelle Karle
Stipa pulchra
© 2008 Zoya Akulova
Stipa pulchra
© 2019 Ron Vanderhoff

Stylocline gnaphaloides    Everlasting nest straw,  Everlasting stylocline,  Mountain neststraw
native
Annual herb

ASTERACEAE

Stylocline gnaphaloides
© 2019 Diane Etchison
Stylocline gnaphaloides
© 2021 Ron Vanderhoff
Stylocline gnaphaloides
© 2021 Ron Vanderhoff

Symphoricarpos mollis    Creeping snowberry,  Trailing snowberry
native
Shrub

CAPRIFOLIACEAE

Symphoricarpos mollis
© 2019 Ron Vanderhoff
Symphoricarpos mollis
© 2020 Cara Wilcox
Symphoricarpos mollis
© 2019 Ron Vanderhoff

Taraxacum officinale    Common dandelion,  Dandelion,  Red seeded dandelion
invasive non-native
Perennial herb

ASTERACEAE

Taraxacum officinale
© 2021 Ron Vanderhoff
Taraxacum officinale
© 2019 Diane Etchison
Taraxacum officinale
© 2021 Ron Vanderhoff

Tetradymia comosa    Cotton thorn,  Hairy horsebrush
native
Shrub

ASTERACEAE

Tetradymia comosa
© 2015 Ron Vanderhoff
Tetradymia comosa
© 2017 Ron Vanderhoff
Tetradymia comosa
© 2014 Ron Vanderhoff

Thalictrum polycarpum    Fendler's meadow rue,  Meadow rue,  Torrey's meadow rue
native
Perennial herb

RANUNCULACEAE

Thalictrum polycarpum
© 2017 Thomas Reyes
Thalictrum polycarpum
© 2019 Patrick Furtado
Thalictrum polycarpum
© 2020 Diane Etchison

Thysanocarpus curvipes    Fringe pod,  Fringed pod,  Hairy lacepod
native
Annual herb

BRASSICACEAE

Thysanocarpus curvipes
© 2019 Steve Matson
Thysanocarpus curvipes
© 2014 Steve Matson
Thysanocarpus curvipes
© 2016 Steve Matson

Torilis nodosa    Hedge parsley,  Knotted hedge parsley,  Knotted hedgeparsley
non-native
Annual herb

APIACEAE

Torilis nodosa
© 2011 Steve Matson
Torilis nodosa
© 2011 Steve Matson
Torilis nodosa
© 2011 Steve Matson

Toxicodendron radicans ssp. diversilobum    Poison oak,  Poisonoak,  Western Poison Oak
native
Vine, Shrub

ANACARDIACEAE

Toxicodendron radicans ssp. diversilobum
© 2020 Ron Vanderhoff
Toxicodendron radicans ssp. diversilobum
© 2019 Randy Huey
Toxicodendron radicans ssp. diversilobum
© 2021 Bryant Baker

Tribulus terrestris    Puncture vine,  Puncturevine
invasive non-native
Annual herb

ZYGOPHYLLACEAE

Tribulus terrestris
© 2015 Steve Matson
Tribulus terrestris
© 2020 Ron Vanderhoff
Tribulus terrestris
© 2020 Maura Hay

Trichostema lanceolatum    Vinegarweed
native
Annual herb

LAMIACEAE

Trichostema lanceolatum
© 2018 Ron Vanderhoff
Trichostema lanceolatum
© 2016 Nathan Mudry
Trichostema lanceolatum
© 2019 Aaron Echols

Trifolium albopurpureum    Indian clover,  Rancheria clover
native
Annual herb

FABACEAE

Trifolium albopurpureum
© 2024 Steve Matson
Trifolium albopurpureum
© 2024 Steve Matson
Trifolium albopurpureum
© 2024 Steve Matson

Trifolium amplectens var. truncatum    Dwarf sack clover
native
Annual herb

FABACEAE

Trifolium amplectens var. truncatum
© 2021 Ron Vanderhoff
Trifolium amplectens var. truncatum
© 2023 Steven Mills Glascock
Trifolium amplectens var. truncatum
© 2021 Ron Vanderhoff

Trifolium ciliolatum    Foothill clover,  Tree clover
native
Annual herb

FABACEAE

Trifolium ciliolatum
© 2020 Diane Etchison
Trifolium ciliolatum
© 2015 Diane Etchison
Trifolium ciliolatum
© 2019 Ron Vanderhoff

Trifolium gracilentum    Graceful clover,  Pin point clover,  Pinpoint clover
native
Annual herb

FABACEAE

Trifolium gracilentum
© 2016 Steve Matson
Trifolium gracilentum
© 2016 Steve Matson
Trifolium gracilentum
© 2016 Steve Matson

Trifolium microcephalum    Hairy clover,  Small headed clover
native
Annual herb

FABACEAE

Trifolium microcephalum
© 2005 Steve Matson
Trifolium microcephalum
© 2016 Michael Mitchell
Trifolium microcephalum
© 2019 Ron Vanderhoff

native
Annual herb

FABACEAE

Trifolium tridentatum var. aciculare
© 2024 Steve Conger
Trifolium tridentatum var. aciculare
© 2024 Steve Conger
Trifolium tridentatum var. aciculare
© 2018 Stacie Wolny

Trifolium variegatum    Variegated clover,  White tipped clover,  Whitetip clover
native
Annual herb

FABACEAE

Trifolium variegatum
© 2022 Steve Matson
Trifolium variegatum
© 2017 Michael Mitchell
Trifolium variegatum
© 2019 Diane Etchison

Trifolium wormskioldii    Coast clover,  Cow clover,  Cows clover
native
Perennial herb

FABACEAE

Trifolium wormskioldii
© 2003 Steve Matson
Trifolium wormskioldii
© 2003 Steve Matson
Trifolium wormskioldii
© 2003 Steve Matson

Tropidocarpum gracile    Dobie pod,  Slender keel fruit,  Slender tropidocarpum
native
Annual herb

BRASSICACEAE

Tropidocarpum gracile
© 2014 Steve Matson
Tropidocarpum gracile
© 2014 Steve Matson
Tropidocarpum gracile
© 2014 Steve Matson

Typha angustifolia    Nail rod,  Narrow leaf cattail,  Narrowleaf cattail
non-native
Perennial herb (aquatic)

TYPHACEAE

Typha angustifolia
© 2019 Ron Vanderhoff
Typha angustifolia
© 2021 Ron Vanderhoff
Typha angustifolia
© 2021 Ron Vanderhoff

Typha domingensis    Narrowleaf cattail,  Southern cattail
native
Perennial herb

TYPHACEAE

Typha domingensis
© 2020 Ron Vanderhoff
Typha domingensis
© 2020 Ron Vanderhoff
Typha domingensis
© 2023 Ron Vanderhoff

Typha latifolia    Broadleaf cattail,  Common cattail,  Soft flag
native
Perennial herb (aquatic)

TYPHACEAE

Typha latifolia
© 2013 Steve Matson
Typha latifolia
© 2013 Steve Matson
Typha latifolia
© 2013 Steve Matson

Umbellularia californica    Bay laurel,  California bay,  California laurel, bay tree
native
Tree

LAURACEAE

Umbellularia californica
© 2023 Mary Ann Machi
Umbellularia californica
© 2016 Steve Matson
Umbellularia californica
© 2023 Mary Ann Machi

Urtica dioica ssp. holosericea    Giant creek nettle,  Hoary nettle,  Mountain nettle
native
Perennial herb

URTICACEAE

Urtica dioica ssp. holosericea
© 2014 Steve Matson
Urtica dioica ssp. holosericea
© 2014 Steve Matson
Urtica dioica ssp. holosericea
© 2014 Steve Matson

Venegasia carpesioides    Canyon sunflower
native
Perennial herb

ASTERACEAE

Venegasia carpesioides
© 2014 Steve Matson
Venegasia carpesioides
© 2014 Steve Matson
Venegasia carpesioides
© 2014 Steve Matson

Verbena lasiostachys var. abramsii    Vervain,  Western vervain
native
Perennial herb

VERBENACEAE

Verbena lasiostachys var. abramsii
© 2010 Steve Matson
Verbena lasiostachys var. abramsii
© 2010 Steve Matson
Verbena lasiostachys var. abramsii
© 2010 Steve Matson

Veronica americana    American brooklime,  American speedwell,  Brooklime
native
Perennial herb

PLANTAGINACEAE

Veronica americana
© 2016 Steve Matson
Veronica americana
© 2016 Steve Matson
Veronica americana
© 2016 Steve Matson

Veronica anagallis-aquatica    Water speedwell
non-native
Perennial herb

PLANTAGINACEAE

Veronica anagallis-aquatica
© 2015 Steve Matson
Veronica anagallis-aquatica
© 2015 Steve Matson
Veronica anagallis-aquatica
© 2022 Bob Sweatt

Veronica peregrina ssp. xalapensis    Hairy purslane speedwell,  Neckweed,  Purslane speedwell
native
Annual herb

PLANTAGINACEAE

Veronica peregrina ssp. xalapensis
© 2020 Steve Matson
Veronica peregrina ssp. xalapensis
© 2020 Ron Vanderhoff
Veronica peregrina ssp. xalapensis
© 2020 Steve Matson

Vicia americana    American vetch
native
Perennial herb, Vine

FABACEAE

Vicia americana
© 2021 Charles Smith
Vicia americana
© 2021 Ron Vanderhoff
Vicia americana
© 2022 Mary Sue Ittner

Vicia exigua    Louisiana vetch
native
Annual herb

FABACEAE

Vicia exigua
© 2017 Diane Etchison
Vicia exigua
© 2015 Jean Pawek
Vicia exigua
© 2009 Adonis (Don) Tate

Vicia villosa    Hairy vetch,  Hairy Vetch, Winter Vetch
invasive non-native
Annual herb, Vine

FABACEAE

Vicia villosa
© 2019 Diane Etchison
Vicia villosa
© 2019 Diane Etchison
Vicia villosa
© 2019 Gary McDonald

Vinca major    Bigleaf periwinkle,  Greater periwinkle,  Vinca
invasive non-native
Perennial herb

APOCYNACEAE

Vinca major
© 2020 Julia Markey
Vinca major
© 2022 Ron Vanderhoff
Vinca major
© 2021 Ron Vanderhoff

Viola pedunculata    California golden violet,  Johnny jump up
native
Perennial herb

VIOLACEAE

Viola pedunculata
© 2014 Steve Matson
Viola pedunculata
© 2014 Steve Matson
Viola pedunculata
© 2014 Steve Matson

Vitis girdiana    Desert wild grape,  Southern california grape
native
Vine, Shrub

VITACEAE

Vitis girdiana
© 2019 Ron Vanderhoff
Vitis girdiana
© 2020 Ron Vanderhoff
Vitis girdiana
© 2021 Aaron Echols

Vulpia bromoides    Brome fescue
non-native
Annual grass

POACEAE

Vulpia bromoides
© 2022 Diana Wahl
Vulpia bromoides
© 2021 Toni Corelli
Vulpia bromoides
© 2021 David popp

Vulpia octoflora    Sixweeks grass
native
Annual grass

POACEAE

Vulpia octoflora
© 2023 R.A. Chasey
Vulpia octoflora
© 2020 Sara Timby
Vulpia octoflora
© 2018 Ken Hickman

Woodwardia fimbriata    Chain fern,  Giant chain fern,  Giant chainfern
native
Fern

BLECHNACEAE

Woodwardia fimbriata
© 2019 Julie Kierstead Nelson
Woodwardia fimbriata
© 2020 R.A. Chasey
Woodwardia fimbriata
© 2020 Julie A. Kierstead

Xanthium strumarium    Rough cockleburr
native
Annual herb

ASTERACEAE

Xanthium strumarium
© 2011 Steve Matson
Xanthium strumarium
© 2011 Steve Matson
Xanthium strumarium
© 2011 Steve Matson

Xylococcus bicolor    Mission manzanita
native
Shrub

ERICACEAE

Xylococcus bicolor
© 2023 R.A. Chasey
Xylococcus bicolor
© 2012 Ron Vanderhoff
Xylococcus bicolor
© 2023 R.A. Chasey

Yucca whipplei ssp. whipplei    Chaparral yucca
native
Shrub

AGAVACEAE

Yucca whipplei ssp. whipplei
© Geoff Burleigh
Yucca whipplei ssp. whipplei
© 2023 Jordan Collins
Yucca whipplei ssp. whipplei
© 2020 Julia Markey

Zannichellia palustris    Horned pondweed
native
Perennial herb

ZANNICHELLIACEAE

Zannichellia palustris
© 2021 Ron Vanderhoff
Zannichellia palustris
© 2021 Ron Vanderhoff
Zannichellia palustris
© 2021 Ron Vanderhoff

Zigadenus fremontii var. fremontii    Fremont's star lily,  Fremont's death camas
native
Perennial herb

MELANTHIACEAE

Zigadenus fremontii var. fremontii
© 2024 Carissa Brands
Zigadenus fremontii var. fremontii
© 2024 Mary Conway
Zigadenus fremontii var. fremontii
© 2024 Lynn Overtree