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Red Hills
Sierra Nevada foothills Tuolumne County |
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| Davilla, B.; Clifton, G.; Taylor D. / G.F. Hrusa checklists (1984-01-01) | ||||||
| 329 PLANTS |
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Achyrachaena mollis Blow-Wives
native
Annual herb 
© 2015 Diane Etchison 
© 2021 Cynthia Powell 
© 2022 Mike Russler |
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Adenostoma fasciculatum Chamise
native
Tree, Shrub 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2019 Steve Matson |
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Aegilops triuncialis Barbed goatgrass
• invasive non-native
Annual grass 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2018 Scott Oneto |
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Agoseris heterophylla Annual agoseris, Annual mountain dandelion
native
Annual herb 
© 2003 Steve Matson 
© 2021 Lisa Berry 
© 2020 Bob Sweatt |
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Agrostis exarata var. monolepis Spike bentgrass, Spike redtop
native
Perennial grass 
© 2022 Teal Derrer 
© 2021 David popp 
© 2022 John Rawlings |
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Agrostis microphylla Little leaf bentgrass, Small leaf bentgrass, Small leaved bentgrass
native
Annual grass 
© 2023 John Rawlings 
© 2023 John Rawlings 
© 2023 John Rawlings |
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Agrostis stolonifera Creeping bentgrass, Redtop
• invasive non-native
Perennial grass 
© 2018 Rachelle Gray 
© 2018 Rachelle Gray 
© 2018 Rachelle Gray |
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Ailanthus altissima Ailanthus, Tree of heaven
• invasive non-native
Tree 
© 2022 Jenny Gossett 
© 2022 Jenny Gossett 
© 2020 Julie A. Kierstead |
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Aira caryophyllea Shiver grass, Silver hairgrass, Silvery hairgrass
• invasive non-native
Annual grass 
© 2005 Steve Matson 
© 2005 Steve Matson 
© 2005 Steve Matson |
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Alisma plantago-aquatica Northern water plantain
native
Perennial herb (aquatic) 
© 2023 Ken-ichi Ueda 
© 2022 R.A. Chasey 
© 2019 Gena Bentall |
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Allium cratericola Cascade onion
native
Perennial herb (bulb) 
© 2016 BOB CASE 
© 2022 Cynthia Powell 
© 2017 David Greenberger |
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Allium peninsulare Mexicali onion
native
Perennial herb (bulb) 
© 2024 Mike Russler 
© 2019 Diane Etchison 
© 2017 Art Clark |
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Allium tuolumnense Rawhide hill onion
• rare native
Perennial herb (bulb) 
© 2024 Mike Russler 
© 2024 Mike Russler 
© 2024 Mike Russler |
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Amaranthus albus Pigweed amaranth, Tumbleweed
non-native
Annual herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2018 Ron Vanderhoff |
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Amaranthus blitoides Mat amaranth, Prostrate amaranth, Prostrate pigweed
native
Annual herb 
© 2020 Ron Vanderhoff 
© 2023 Helen Hancock 
© 2024 Dianne Lake |
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Anagallis arvensis Scarlet pimpernel
non-native
Annual herb 
© 2017 B.J. Dion 
© 2018 Stacie Wolny 
© 2017 B.J. Dion |
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Ancistrocarphus filagineus False neststraw, Woolly fishhooks
native
Annual herb 
© 2020 Matt Berger 
© 2019 Gerald Carr 
© 2021 Jacob Smith |
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Anthemis cotula Dog fennel, Mayweed, dog fennel, Stinking chamomile
• invasive non-native
Annual herb 
© 2017 Diane Etchison 
© 2019 Nathan Taxel 
© 2019 Dave Beller |
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Antirrhinum vexillo-calyculatum ssp. breweri Wiry snapdragon
native
Annual herb 
© 2020 Stacie Wolny 
© 2020 Stacie Wolny 
© 2022 R.A. Chasey |
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Aphanes occidentalis Western lady's mantle
native
Annual, Perennial herb 
© 2024 Mike Russler 
© 2025 Ron Vanderhoff 
© 2024 Mike Russler |
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Arceuthobium campylopodum Golden mistletoe, Pine dwarf mistletoe, Pine mistletoe
native
Perennial herb (parasitic) 
© 2016 Richard Spjut 
© 2021 Mikhela Aiken 
© 2022 Charles Russell |
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Arctostaphylos manzanita ssp. manzanita Common Manzanita
native
Shrub 
© 2024 Alaine Arslan 
© 2021 Mike Russler 
© 2023 R.A. Chasey |
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Arctostaphylos viscida ssp. mariposa Mariposa manzanita
native
Tree, Shrub 
© 2017 Sarah Williams 
© 2024 Mike Russler 
© 2019 Cynthia Powell |
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Asclepias fascicularis Narrow leaf milkweed
native
Perennial herb 
© 2010 Steve Matson 
© 2010 Steve Matson 
© 2014 Steve Matson |
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Astragalus gambelianus Dwarf loco weed, Gambel's dwarf milk vetch, Gambel's locoweed
native
Annual herb 
© 2019 Ron Vanderhoff 
© 2022 Mike Russler 
© 2024 R.A. Chasey |
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Avena barbata Slender oat, Slim oat
• invasive non-native
Annual grass 
© 2018 Julian Geoghegan 
© 2023 David popp 
© 2019 Ron Vanderhoff |
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Blennosperma nanum Common stickyseed, Yellow carpet
native
Annual herb 
© 2022 James Adams 
© 2023 R.A. Chasey 
© 2019 David popp |
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Briza minor Little quaking grass, Little quakinggrass, Little rattlesnake grass
non-native
Annual grass 
© 2023 R.A. Chasey 
© 2019 Gary McDonald 
© 2019 Gary McDonald |
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Brodiaea elegans Harvest brodiaea
native
Perennial herb 
© 2019 Joe Engelbrecht 
© 2009 Bob Case 
© 2009 BOB CASE |
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Bromus arizonicus Arizona brome
native
Annual grass  © 2024 Matt C. Berger  © 2024 Matt C. Berger  © 2024 Matt C. Berger |
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Bromus diandrus Bromegrass, Ripgut brome, Ripgut grass
• invasive non-native
Annual grass 
© Alize 
© 2021 Richard Spjut 
© 2024 David popp |
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Bromus hordeaceus Soft brome, Soft chess
• invasive non-native
Annual grass 
© 2023 Ron Vanderhoff 
© 2018 Gary McDonald 
© 2018 Gary McDonald |
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Bromus madritensis ssp. madritensis Foxtail chess
non-native
Annual grass 
© 2015 Chris Jaster 
© 2015 Chris Jaster 
© 2015 Chris Jaster |
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Bromus madritensis ssp. rubens Red brome
• invasive non-native
Annual grass 
© 2015 Chris Jaster 
© 2015 jamie smith 
© 2018 Gary McDonald |
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Bromus sterilis Poverty brome, Sterile brome
non-native
Annual grass 
© 2021 John Rawlings 
© 2023 John Rawlings 
© 2023 John Rawlings |
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Calandrinia ciliata red maids, Calandrinia
native
Annual herb 
© 2021 Mary Ann Machi 
© 2024 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
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Calochortus albus White fairy lantern, White globe lily
native
Perennial herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
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Calochortus invenustus Plain mariposa lily
native
Perennial herb 
© Geoff Burleigh 
© 2012 Ron Vanderhoff 
© 2018 Diane Etchison |
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Calochortus superbus Yellow mariposa
native
Perennial herb 
© 2019 Julie Kierstead Nelson 
© 2005 BOB CASE 
© 2023 Mike Russler |
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Calochortus venustus Butterfly mariposa lily
native
Perennial herb 
© 2014 Steve Matson 
© 2012 Zack Abbey 
© 2019 Randy Huey |
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Calycadenia mollis Soft calycadenia, Soft western rosinweed
native
Annual herb 
© 2021 Mike Russler 
© 2021 Mike Russler 
© 2022 Mike Russler |
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Calycadenia multiglandulosa Rosin weed, Sticky calycadenia, Sticky western rosinweed
native
Annual herb 
© 2018 Alice Cummings 
© 2021 R.A. Chasey 
© 2019 Alice Cummings |
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Calycadenia truncata Rosin weed
native
Annual herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2023 Helen Hancock |
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Calycanthus occidentalis Spicebush, Sweet shrub
native
Shrub 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2019 Julie A. Kierstead |
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Calystegia occidentalis ssp. fulcrata Chaparral false bindweed, Sonora morning glory
native
Perennial herb 
© 2022 Cynthia Powell 
© 2022 Cynthia Powell 
© 2022 Cynthia Powell |
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Capsella bursa-pastoris Shepherd's purse
non-native
Annual herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2008 Steve Matson |
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Cardamine oligosperma Bitter cress, Idaho bittercress
native
Annual, Perennial herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2008 Steve Matson |
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Carex densa Dense sedge, Sedge
native
Perennial grasslike herb 
© 2023 John Rawlings 
© 2023 R.A. Chasey 
© 2022 R.A. Chasey |
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Carex nudata Dudley's sedge, Naked sedge, Torrent sedge
native
Perennial grasslike herb 
© 2022 R.A. Chasey 
© 2016 David Greenberger 
© 2014 John Malpas |
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Carex praegracilis Clustered field sedge, Field sedge
native
Perennial grasslike herb 
© 2020 Steve Matson 
© 2020 Steve Matson 
© 2020 Steve Matson |
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Carex serratodens Bifid sedge, Two tooth sedge
native
Perennial grasslike herb 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2021 Cynthia Powell |
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Carex tumulicola Foothill sedge, Slender sedge, Split awn sedge
native
Perennial grasslike herb 
© 2017 David Greenberger 
© 2021 John Rawlings 
© 2021 John Rawlings |
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Castilleja affinis Indian paintbrush
native
Perennial herb 
© 2021 Dylan Neubauer 
© 2019 Diane Etchison 
© 2019 Diane Etchison |
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Castilleja applegatei Pine indian paintbrush, Wavy leaf paintbrush, Wavy leaved paintbrush
native
Perennial herb 
© 2019 Timothy Boomer | WildMacro.com 
© 2019 Diane Etchison 
© 2020 David Greenberger |
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Castilleja attenuata Narrow leaved owl's clover, Valley tassels
native
Annual herb 
© 2024 Steve Conger 
© 2024 Mary Ann Machi 
© 2019 Timothy Boomer |
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Castilleja foliolosa Texas paintbrush, Woolly indian paintbrush
native
Perennial herb 
© 2018 Steve Matson 
© 2018 Steve Matson 
© 2019 Ron Vanderhoff |
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Castilleja minor ssp. spiralis Lesser indian paintbrush, Lesser paintbrush
native
Annual herb 
© 2023 Rhonda Allen 
© 2019 Ron Vanderhoff 
© 2019 Matt Berger |
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Castilleja subinclusa Franciscan paint brush, Longleaf indian paintbrush
native
Perennial herb 
© 2021 Dianne Lake 
© 2022 Dianne Lake 
© 2022 Zoya Akulova-Barlow |
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Ceanothus cuneatus Buck brush, Wedgeleaf ceanothus
native
Shrub 
© 2021 Steve Matson 
© 2021 Steve Matson 
© 2021 Steve Matson |
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Centaurea melitensis Maltese star thistle, Napa star thistle, Tocalote
• invasive non-native
Annual herb 
© 2019 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Laura Anna Arellano |
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Centaurium venustum California Centaury, Charming Centaury
native
Annual herb 
© 2024 Bonnie Nickel 
© 2021 Bonnie Nickel 
© 2019 Diane Etchison |
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Cerastium glomeratum Large mouse ears, Mouseear chickweed, Sticky chickweed
non-native
Annual herb 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2023 R.A. Chasey |
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Ceratophyllum demersum Coon's tail, Hornwort
native
Perennial herb 
© 2023 Zoya Akulova-Barlow 
© 2018 Ron Vanderhoff 
© 2022 Donald Burk |
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Chaenactis glabriuscula Common yellow chaenactis, Yellow pincushion
native
Annual herb 
© 2019 Marisa Persaud 
© 2016 Steve Matson 
© 2019 Marisa Persaud |
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Chamaesyce ocellata Contura creek spurge
native
Annual herb 
© 2024 Donald Burk 
© 2005 Steve Matson 
© 2023 Donald Burk |
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Chamomilla suaveolens Pineapple weed
native
Annual herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2018 Stacie Wolny |
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Chlorogalum grandiflorum Red hills soap plant, Red hills soaproot
• rare native
Perennial herb (bulb) 
© 2022 Cynthia Powell 
© 2019 David Greenberger 
© 2022 Cynthia Powell |
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Chlorogalum pomeridianum Amole, Soap plant, Soaproot
native
Perennial herb 
© 2019 Patrick Furtado 
© 2019 Patrick Furtado 
© 2019 Mary Conway |
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Chorizanthe membranacea Pink spineflower
native
Annual herb 
© 2024 Mike Russler 
© 2019 Steve Matson 
© 2023 Helen Hancock |
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Chorizanthe polygonoides Knotweed spineflower
native
Annual herb 
© 2017 R.A. Chasey 
© 2018 David popp 
© 2023 Aaron Echols |
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Cicendia quadrangularis Common microcalis, Oregon timwort
native
Annual herb 
© 2008 Steve Matson 
© 2022 Charles Russell 
© 2023 Bill Kress |
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Cirsium occidentale var. californicum Bigelow thistle, California thistle, Cobwebby thistle
native
Perennial herb 
© 2021 Amber Bedgood 
© 2021 Mike Russler 
© 2013 James Gonsman |
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Clarkia arcuata Glandular clarkia, Glandular fairyfan
native
Annual herb 
© 2020 Steve Laymon 
© 2021 Donald Burk 
© 2022 Mike Russler |
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Clarkia biloba ssp. biloba Two lobed clarkia, Twolobe clarkia
native
Annual herb 
© 2024 Karen Swift 
© 2020 Steve Laymon 
© 2022 Cynthia Powell |
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Clarkia purpurea ssp. purpurea Purple clarkia, Winecup clarkia
native
Annual herb 
© 2020 R.A. Chasey 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
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Clarkia williamsonii Fort Miller clarkia, Fort Miller fairyfan
native
Annual herb 
© 2019 Alison Sheehey 
© 2019 Alison Sheehey 
© 2021 Mike Russler |
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Claytonia exigua ssp. exigua Little spring beauty, Serpentine springbeauty, Viridis
native
Annual herb 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2019 Steve Matson |
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Claytonia perfoliata ssp. perfoliata Claytonia, Miner's lettuce
native
Annual herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2008 Steve Matson |
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Clematis lasiantha Chaparral clematis, Pipestem
native
Perennial herb, Vine 
© 2008 Steve Matson 
© 2018 Steve Matson 
© 2024 Dana York |
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Collinsia sparsiflora var. collina Hillside collinsia
native
Annual herb 
© 2021 Steve Matson 
© 2021 Steve Matson 
© 2015 Steve Matson |
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Collinsia sparsiflora var. sparsiflora Few flowered collinsia
native
Annual herb 
© 2015 James Gonsman 
© 2021 Charles Russell 
© 2021 Charles Russell |
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Collinsia tinctoria Sticky chinese houses, Tincture plant
native
Annual herb 
© 2016 Steve Matson 
© 2021 Mike Russler 
© 2022 R.A. Chasey |
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Conium maculatum Poison hemlock
• invasive non-native
Perennial herb 
© 2024 Cynthia Powell 
© 2013 Toni Corelli 
© 2016 Cynthia Powell |
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Cordylanthus tenuis ssp. tenuis Slender bird's beak
native
Annual herb 
© 2019 Bob Sweatt 
© 2019 Matt Berger 
© 2019 R.A. Chasey |
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Coreopsis stillmanii Stillman's coreopsis
native
Annual herb 
© 2020 Matt Berger 
© 2020 Matt Berger 
© 2020 Matt Berger |
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Cotula australis Australian brass buttons, Australian cotula, Australian waterbuttons
non-native
Annual herb 
© 2023 Mike Russler 
© 2022 Ron Vanderhoff 
© 2023 Mike Russler |
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Crassula aquatica Aquatic pygmy weed, Pigmy weed, Water pygmyweed
native
Annual herb 
© 2019 Ron Vanderhoff 
© 2022 Catherine Chang 
© 2022 Catherine Chang |
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Crassula connata Pigmy weed, Sand pygmy weed, Sand pygmyweed
native
Annual herb 
© 2019 Ron Vanderhoff 
© 2022 Sameer Saroa 
© 2019 Adam Chasey |
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Cryptantha flaccida Beaked cryptantha, Flaccid cryptantha, Weakstem cryptantha
native
Annual herb 
© 2018 Alice Cummings 
© 2016 Steve Matson 
© 2016 Steve Matson |
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Cryptantha intermedia Clearwater cryptantha, Common cryptantha
native
Annual herb 
© 2020 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
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Cryptantha mariposae Mariposa cryptantha
• rare native
Annual herb  © 2010 Robin Kent  © 2011 Steve Matson  © 2013 Jean Pawek |
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Cryptantha muricata Pointed cryptantha, Prickly cryptantha, Prickly popcorn flower
native
Annual herb 
© 2019 Marisa Persaud 
© 2023 Mike Russler 
© 2019 Marisa Persaud |
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Cryptantha rostellata Beaked cryptantha
• rare native
Annual herb 
© 2018 Gerald Carr 
© 2018 Gerald Carr 
© 2023 Chris McCarron |
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Cuscuta sp. Small Tree-Mallow
|
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Cynodon dactylon Bermuda grass, Bermudagrass
• invasive non-native
Perennial grass 
© 2021 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
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Cyperus eragrostis Tall cyperus, Tall flatsedge
native
Perennial grasslike herb 
© 2016 Joan Hampton 
© 2024 Ron Vanderhoff 
© 2024 Ron Vanderhoff |
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Daucus pusillus American wild carrot, Rattlesnake weed
native
Annual herb 
© 2019 Diane Etchison 
© 2022 David Wolfson 
© 2019 John Rawlings |
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Delphinium hansenii Eldorado larkspur, Hansen's larkspur
native
Perennial herb 
© 2022 Steve Matson 
© 2022 Steve Matson 
© 2014 Steve Matson |
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Delphinium hesperium Foothill larkspur, Western larkspur
native
Perennial herb 
© 2022 R.A. Chasey 
© 2020 Fred Melgert / Carla Hoegen 
© 2020 Fred Melgert / Carla Hoegen |
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Deschampsia danthonioides Annual hairgrass
native
Annual grass  © 2008 Keir Morse 
© 2024 Matt Berger 
© 2023 Matt Berger |
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Dichelostemma capitatum Blue dicks
native
Perennial herb 
© 2023 Steve Matson 
© 2022 Steve Matson 
© 2019 Steve Matson |
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Dichelostemma multiflorum Many flowered brodiaea, Manyflower brodiaea, Roundtooth snakelily
native
Perennial herb 
© 2011 Steve Matson 
© 2011 Steve Matson 
© 2016 Steve Matson |
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Dodecatheon hendersonii Mosquito bill
native
Perennial herb 
© 2025 Britt Thorsnes 
© 2016 Steve Matson 
© 2020 BLM Redding Field Office |
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Draba verna Spring draba, Whitlow grass, Whitlowgrass
non-native
Annual herb 
© 2011 Steve Matson 
© 2004 Steve Matson 
© 2016 Steve Matson |
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Dudleya cymosa Canyon dudleya, Canyon liveforever, Rock lettuce
native
Perennial herb 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2020 Kristin Sabo |
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Eleocharis macrostachya Common spikerush, Creeping spike rush, Pale spikerush
native
Perennial grasslike herb 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2003 Steve Matson |
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Eleocharis rostellata Beaked spikerush, Walking sedge
native
Perennial grasslike herb 
© 2015 Steve Matson 
© 2015 Steve Matson 
© 2015 Steve Matson |
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Elymus multisetus Big squirreltail grass
native
Perennial grass 
© 2019 Ron Vanderhoff 
© 2023 Helen Hancock 
© 2021 Denise Defreese |
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Epilobium densiflorum Dense boisduvalia, Dense flowered boisduvalia, Dense flowered spike primrose
native
Annual herb 
© 2024 Steve Conger 
© 2009 BOB CASE 
© 2020 Bob Sweatt |
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Epilobium minutum Chaparral willowherb, Desert willow herb, Little willowherb
native
Annual herb 
© 2017 Michael Mitchell 
© 2021 R.A. Chasey 
© 2019 Ken Lunders |
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Ericameria arborescens Golden fleece, Goldenfleece
native
Shrub 
© 2019 Bryant Baker 
© 2019 Bryant Baker 
© 2015 Hayley Ross |
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Eriodictyon californicum California yerba santa, Yerba santa
native
Shrub 
© 2023 Suzanne L. Weakley 
© 2022 BOB CASE 
© 2020 Julie A. Kierstead |
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Eriogonum nudum var. nudum Naked buckwheat, Naked Wild Buckwheat, Nude buckwheat
native
Shrub 
© 2021 Mike Russler 
© 2021 Mike Russler 
© 2021 Mike Russler |
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Eriogonum nudum var. pubiflorum Hairy flowered buckwheat, Naked buckwheat, Fremont's Wild Buckwheat
native
Annual herb 
© 2024 Mike Russler 
© 2011 Steve Matson 
© 2011 Steve Matson |
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Eriogonum tripodum Tripod buckwheat
• rare native
Shrub 
© 2023 Mike Russler 
© 2023 Mike Russler 
© 2023 Mike Russler |
|
Eriogonum vimineum Wicker buckwheat, Wicker stemmed eriogonum, Wickerstem buckwheat
native
Annual herb 
© 2019 David Greenberger 
© 2019 David popp  © 2008 Keir Morse |
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Eriophyllum lanatum var. grandiflorum Common woolly sunflower, Large flowered woolly sunflower
native
Perennial herb 
© 2020 John Dittes 
© 2023 Anna Prang 
© 2021 Steve Laymon |
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Erodium cicutarium Coastal heron's bill, Red stemmed filaree, Redstem stork's bill
• invasive non-native
Annual herb 
© 2022 Steve Matson 
© 2008 Steve Matson 
© 2022 Steve Matson |
|
Eschscholzia caespitosa Foothill poppy, Tufted eschscholzia, Tufted poppy
native
Annual herb 
© 2019 Ron Vanderhoff 
© 2024 Dana York 
© 2024 Dana York |
|
Eschscholzia californica California poppy
native
Annual, Perennial herb 
© 2019 Dee Shea Himes 
© 2021 Ron Vanderhoff 
© 2019 Amy Rapport |
|
Eschscholzia lobbii Frying pans, Fryingpans
native
Annual herb 
© 2022 Steve Matson 
© 2022 Steve Matson 
© 2022 Steve Matson |
|
Euphorbia spathulata Reticulate seeded spurge, Warty spurge
native
Annual herb 
© 2008 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Filago californica California cottonrose
native
Annual herb 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2019 Steve Matson |
|
Filago gallica Narrowleaf cottonrose
non-native
Annual herb 
© 2023 R.A. Chasey 
© 2024 Mike Russler 
© 2017 Barbara Boethling |
|
Galium aparine Cleavers, Common bedstraw, Goose grass
native
Annual herb 
© 2020 Ron Vanderhoff 
© 2023 Julia Markey 
© 2020 Ron Vanderhoff |
|
Galium bolanderi Bolander galium, Bolander's bedstraw
native
Perennial herb 
© 2020 Neal Kramer 
© 2015 Steve Matson 
© 2015 Steve Matson |
|
Galium murale Tiny bedstraw, Yellow wall bedstraw
non-native
Annual herb 
© 2022 R.A. Chasey 
© 2021 Cameron Chabre 
© 2014 Bryan Derr |
|
Galium porrigens var. tenue Graceful bedstraw
native
Vine, Shrub 
© 2005 Steve Matson 
© 2005 Steve Matson 
© 2005 Steve Matson |
|
Gastridium ventricosum Nit grass
non-native
Annual grass 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2017 Gary McDonald |
|
Geranium carolinianum Carolina geranium
native
Annual herb 
© 2025 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2016 Steve Matson |
|
Gilia capitata Blue field gilia, Bluehead gilia
native
Annual herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Gilia tricolor ssp. diffusa Bird's eye gilia, Bird's eyes
native
Annual herb 
© 2022 Steve Matson 
© 2022 Steve Matson 
© 2022 Steve Matson |
|
Githopsis pulchella ssp. serpentinicola Serpentine bluecup, Sierra bluecup
• rare native
Annual herb 
© 2022 Mike Russler 
© 2022 Mike Russler 
© 2022 Mike Russler |
|
Githopsis specularioides Common bluecup, Venus' looking glass
native
Annual herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2020 Ken Hickman |
|
Gnaphalium californicum Ladies' tobacco
native
Annual, Perennial herb 
© 2019 Gary McDonald 
© 2020 Steven M Norris 
© 2021 Ron Vanderhoff |
|
Gnaphalium luteo-album Jersey cudweed
non-native
Annual herb 
© 2021 Ron Vanderhoff 
© 2019 Diane Etchison 
© 2015 Chris Jaster |
|
Gnaphalium stramineum Cottonbatting plant
native
Perennial herb 
© 2017 Gary McDonald 
© 2017 Gary McDonald 
© 2017 Gary McDonald |
|
Grindelia camporum Common gumplant, Great valley gumweed, Gum plant
native
Perennial herb 
© 2023 R.A. Chasey 
© 2019 Ron Vanderhoff 
© 2016 Hayley Ross |
|
Helianthus annuus Common sunflower, Hairy leaved sunflower, Sunflower
native
Annual herb 
© 2021 Mike Russler 
© 2019 Bob Case 
© 2024 Mel Letterman |
|
Hemizonia sp. Small Tree-Mallow
|
|
Hesperevax acaulis Dwarf evax, Stemless dwarf cudweed
native
Annual herb 
© 2022 joaquin hale 
© 2022 Ken Hickman 
© 2022 joaquin hale |
|
Hesperolinon micranthum Common dwarf flax, Small flower western flax, Small flowered dwarf flax
native
Annual herb 
© 2024 Mike Russler 
© 2024 Mike Russler 
© 2021 R.A. Chasey |
|
Heterocodon rariflorum Few flowered heterocodon, Rareflower heterocodon, Western pear flower
native
Annual herb 
© 2022 Steve Matson 
© 2022 Steve Matson 
© 2022 Steve Matson |
|
Heteromeles arbutifolia Christmas berry, Toyon
native
Shrub 
© 2015 James Gonsman 
© 2017 Gary McDonald 
© 2022 John Doyen |
|
Heuchera micrantha var. erubescens Alum root, Crevice alumroot
native
Perennial herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2008 Steve Matson |
|
Hoita macrostachya California hemp, Large leather root
native
Perennial herb 
© 2020 Ron Vanderhoff 
© 2022 Natalie McNear 
© 2021 Julie King |
|
Holocarpha virgata Narrow tarplant, Pitgland tarweed, Yellowflower tarweed
native
Annual herb 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2019 stephen rosenthal |
|
Holozonia filipes Greene's white crown, Holozonia, Whitecrown
native
Perennial herb 
© 2015 Steve Matson 
© 2015 Steve Matson 
© 2015 Steve Matson |
|
Hordeum brachyantherum ssp. californicum California barley, California meadow barley
native
Perennial grass 
© 2021 Cynthia Powell 
© 2021 John Rawlings 
© 2021 John Rawlings |
|
Hordeum marinum ssp. gussoneanum Barley, Mediterranean barley
non-native
Annual grass 
© 2018 Carolyn 
© 2020 Paul Aigner 
© 2017 Toni Corelli |
|
Hordeum murinum ssp. glaucum Blue foxtail, Smooth barley
non-native
Annual grass 
© 2018 Gary McDonald 
© 2019 Gary McDonald 
© 2017 Gary McDonald |
|
Hordeum murinum ssp. leporinum Farmer's foxtail, Foxtail barley, Hare barley
non-native
Annual grass 
© 2022 Ron Vanderhoff 
© 2021 Al Keuter 
© 2021 Ron Vanderhoff |
|
Horkelia californica ssp. dissita California horkelia
native
Perennial herb 
© 2019 David Greenbeger 
© 2024 Helen Hancock 
© 2024 Helen Hancock |
|
Hypericum perforatum Common st. johnswort, Klamath weed, Klamathweed
• invasive non-native
Perennial herb 
© 2020 Bob Sweatt 
© 2018 stephen rosenthal 
© 2020 Bob Sweatt |
|
Hypochaeris glabra Smooth cat's ear
• invasive non-native
Annual herb 
© 2020 Ron Vanderhoff 
© 2017 Gary McDonald 
© 2019 Ron Vanderhoff |
|
Isoetes howellii Howell's quillwort, Quillwort
native
© 2022 Ken-ichi Ueda 
© 2024 R.A. Chasey 
© 2023 R.A. Chasey |
|
Juglans californica var. hindsii Northern california black walnut
• rare native
Tree 
© 2018 Ron Vanderhoff 
© 2016 Steve Matson 
© 2018 Ron Vanderhoff |
|
Juncus balticus Baltic rush, Wire rush
native
Perennial grasslike herb 
© 2015 Steve Matson 
© 2015 Steve Matson 
© 2019 Bonnie Nickel |
|
Juncus bufonius Common toad rush, Toad rush
native
Annual grasslike herb 
© 2022 Steve Matson 
© 2022 Steve Matson 
© 2022 Steve Matson |
|
Juncus capitatus Leafy bracted dwarf rush, Leafybract dwarf rush
non-native
Annual grasslike herb  © 2025 Alex Heyman 
© 2018 R.A. Chasey 
© 2023 R.A. Chasey |
|
Juncus mexicanus Mexican rush
native
Perennial grasslike herb  © 2004 Steve Matson 
© 2020 Mary Wloch 
© 2019 Diane Etchison |
|
Juncus oxymeris Pointed rush
native
Perennial grasslike herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Juncus xiphioides Iris leaved rush, Irisleaf rush
native
Perennial grasslike herb 
© 2016 Erik Larsen 
© 2017 Ron Vanderhoff 
© 2023 R.A. Chasey |
|
Lactuca saligna Narrow leaved wild lettuce, Willow lettuce, Willowleaf lettuce
non-native
Annual herb 
© 2021 Don Hollander 
© 2019 Stacie Wolny 
© 2021 Don Hollander |
|
Lactuca serriola Prickly lettuce, Prickly wild lettuce
• invasive non-native
Annual herb 
© 2017 Gary McDonald 
© 2017 Gary McDonald 
© 2017 Gary McDonald |
|
Lagophylla glandulosa Glandular hareleaf
native
Annual herb 
© 2021 Steve Laymon 
© 2021 Steve Laymon 
© 2024 Alaine Arslan |
|
Lamium amplexicaule Giraffe head, Henbit deadnettle
non-native
Annual herb 
© 2005 Steve Matson 
© 2005 Steve Matson 
© 2024 Alaine Arslan |
|
Lasthenia californica California goldfields, Common goldfields, Valley goldfields
native
Annual herb 
© 2017 David Greenberger 
© 2020 Susan White 
© 2017 MCOSD EDRR |
|
Layia fremontii Fremont layia, Fremont's tidy tips, Fremont's tidytips
native
Annual herb 
© 2021 Steve Matson 
© 2022 Steve Matson 
© 2021 Steve Matson |
|
Lepidium dictyotum Alkali pepperweed, Net pepper grass
native
Annual herb 
© 2023 Catherine Chang 
© 2023 Catherine Chang 
© 2022 Dianne Lake |
|
Lepidium nitidum Peppergrass, Shining pepper grass, Shining pepperweed
native
Annual herb 
© 2021 Steve Matson 
© 2016 Steve Matson  © 2025 Jason Flores |
|
Lepidium oblongum Veiny pepper grass, Veiny pepperweed, Wayside peppergrass
native
Annual herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Lessingia glandulifera Valley lessingia, Valley vinegar weed
native
Annual herb 
© 2022 Steve Matson 
© 2022 Steve Matson 
© 2022 Steve Matson |
|
Lessingia leptoclada Sierra lessingia
native
Annual herb 
© 2023 Mary Merriman 
© 2023 Mike Russler 
© 2021 Mike Russler |
|
Lessingia nemaclada Slender stemmed lessingia, Slenderstem lessingia, Thread stem lessingia
native
Annual herb 
© 2021 Mike Russler 
© 2021 Mike Russler 
© 2021 Mike Russler |
|
Lewisia rediviva Bitter root
native
Perennial herb 
© 2023 Steve Conger 
© 2020 Matt Berger 
© 2018 Mitchell Coleman |
|
Limnanthes douglasii ssp. rosea Rosy douglas' meadowfoam
native
Annual herb 
© 2020 David popp 
© 2020 Matt Berger 
© 2021 Alaine Arslan |
|
Limnanthes montana Mountain meadowfoam
native
Annual herb 
© 2015 Mary Merriman 
© 2021 Mike Russler 
© 2021 Mike Russler |
|
Linanthus bicolor True babystars
native
Annual herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2008 Steve Matson |
|
Linanthus bolanderi Bolander's linanthus
native
Annual herb 
© 2024 David popp 
© 2022 Dana York 
© 2024 Mike Russler |
|
Linanthus ciliatus Whiskerbrush
native
Annual herb 
© 2020 Bob Sweatt 
© 2018 Glenn Fine 
© 2019 David Magney |
|
Linanthus filipes Thread linanthus
native
Annual herb 
© 2020 Matt Berger 
© 2020 Matt Berger 
© 2020 Matt Berger |
|
Linanthus pygmaeus Pygmy linanthus
native
Annual herb 
© 2019 Steve Matson 
© 2024 R.A. Chasey 
© 2023 Matt Berger |
|
Lithophragma affine Common woodland star, San Francisco woodland star
native
Perennial herb 
© 2018 Steve Matson 
© 2018 Steve Matson 
© 2018 Steve Matson |
|
Lolium multiflorum Italian rye grass
• invasive non-native
Annual, Perennial grass 
© 2019 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Lolium perenne Italian rye grass
• invasive non-native
Annual, Perennial grass
© 2019 Ron Vanderhoff
© 2023 Ron Vanderhoff
© 2021 Ron Vanderhoff |
|
Lomatium congdonii Congdon's lomatium, Mariposa desertparsley
• rare native
Perennial herb 
© 2020 Matt Berger 
© 2024 Mike Russler 
© 2024 Mike Russler |
|
Lomatium marginatum Butte desertparsley, Hartweg's lomatium, Tall hog fennel
native
Perennial herb 
© 2022 R.A. Chasey 
© 2023 R.A. Chasey 
© 2022 Cynthia Powell |
|
Lomatium utriculatum Bladder parsnip, Common lomatium, Hog fennel
native
Perennial herb 
© 2006 Steve Matson 
© 2006 Steve Matson 
© 2015 James Gonsman |
|
Lonicera interrupta Chaparral honeysuckle
native
Vine, Shrub 
© 2018 David Greenberger 
© 2019 Julie Kierstead Nelson 
© 2009 BOB CASE |
|
Lotus humistratus hill lotus
native
Annual herb 
© 2023 R.A. Chasey 
© 2018 Steve Matson 
© 2018 Steve Matson |
|
Lotus purshianus var. purshianus American bird's foot trefoil, American trefoil, Spanish lotus
native
Annual herb 
© 2015 Steve Matson 
© 2015 Steve Matson 
© 2015 Steve Matson |
|
Lotus wrangelianus Wrangel lotus
native
Annual herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Ludwigia peploides ssp. montevidensis Floating primrose willow, Floating water primrose
non-native
Perennial herb 
© 2021 Mike Russler 
© 2021 Mike Russler 
© 2021 Mike Russler |
|
Lupinus benthamii Bentham lupine, Spider lupine
native
Annual herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Lupinus bicolor Annual lupine, Bicolored lupine, Miniature lupine
native
Annual, Perennial herb 
© 2024 Mary Ann Machi 
© 2022 Mike Russler 
© 2024 Mary Ann Machi |
|
Lupinus microcarpus var. microcarpus Chick lupine, Valley lupine
native
Annual herb 
© 2019 Mary Conway 
© 2024 Jacob A 
© 2022 Mike Russler |
|
Lupinus pachylobus Big pod lupine, Fatpod lupine, Mt. diablo lupine
native
Annual herb 
© 2024 Mike Russler 
© 2018 Michael Mitchell 
© 2020 Julie A. Kierstead |
|
Madia elegans ssp. densifolia Common madia
native
Annual herb 
© 2021 Jamie Spielmann 
© 2021 Mike Russler 
© 2020 Diane Etchison |
|
Madia exigua Little tarweed, Meager tarweed, Small tarweed
native
Annual herb 
© 2023 Dianne Lake 
© 2023 Ron Vanderhoff 
© 2021 Helen Hancock |
|
Madia gracilis Grassy tarweed, Gumweed madia, Slender tarweed
native
Annual herb 
© 2024 Mike Russler 
© 2021 Amber Bedgood 
© 2019 Ron Vanderhoff |
|
Meconella californica California fairypoppy, California meconella
native
Annual herb 
© 2021 Karen Swift 
© 2016 Bob Case 
© 2025 Mike Russler |
|
Medicago polymorpha Bur clover, Bur medic, California burclover
• invasive non-native
Annual herb 
© 2019 Gary McDonald 
© 2019 Gary McDonald 
© 2019 Gary McDonald |
|
Melica californica var. nevadensis California melicgrass, Few flowered california melic
native
Perennial grass 
© 2021 David popp 
© 2021 David popp 
© 2021 David popp |
|
Melica torreyana Torrey melic, Torrey's melica, Torrey's melicgrass
native
Perennial grass 
© 2021 Dee Shea Himes 
© 2019 John Rawlings 
© 2023 Diana Wahl |
|
Melilotus indicus Annual yellow sweetclover, Sourclover
non-native
Annual herb 
© 2019 Randy Huey 
© 2019 Randy Huey 
© 2017 Rosalie Benitez |
|
Mentha spicata Spearmint
non-native
Perennial herb 
© 2022 Donald Burk 
© 2022 Donald Burk 
© 2023 Ron Vanderhoff |
|
Micropus californicus var. californicus Q tips, Slender cottonweed
native
Annual herb 
© 2006 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Microseris douglasii ssp. douglasii Douglas' microseris, Douglas' silverpuffs
native
Annual herb 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
|
Mimulus aurantiacus Orange Bush Monkeyflower
native
Shrub 
© 2024 Steve Conger 
© 2024 Steve Conger 
© 2019 Mary Gerbic |
|
Mimulus congdonii Congdon's monkeyflower
native
Annual herb 
© 2006 Steve Matson 
© 2024 R.A. Chasey 
© 2024 Mike Russler |
|
Mimulus douglasii Purple mouse ears
native
Annual herb 
© 2023 Timothy Boomer 
© 2023 Timothy Boomer 
© 2023 Timothy Boomer |
|
Mimulus floribundus Many flowered monkeyflower
native
Annual herb 
© 2025 Mike Russler 
© 2024 Ron Vanderhoff 
© 2024 Ron Vanderhoff |
|
Mimulus guttatus Seep monkey flower, Yellow monkey flower
native
Annual, Perennial herb (rhizomatous) 
© 2019 Stacie Wolny 
© 2015 James Gonsman 
© 2019 Stacie Wolny |
|
Minuartia californica California Sandwort
native
Annual herb 
© 2021 Steve Matson 
© 2021 Steve Matson 
© 2024 Mike Russler |
|
Minuartia douglasii Douglas' Stitchwort
native
Annual herb 
© 2022 Steve Matson 
© 2019 Stacie Wolny 
© 2021 R.A. Chasey |
|
Monardella villosa Coyote mint
native
Perennial herb 
© 2020 Eliezer Margolis 
© 2019 David Self 
© 2019 Patricia Ashe |
|
Monolopia sp. Small Tree-Mallow
|
|
Nassella pulchra Purple needle grass
native
Perennial grass 
© 2019 Michelle Karle 
© 2008 Zoya Akulova 
© 2019 Ron Vanderhoff |
|
Navarretia intertexta ssp. intertexta Interwoven navarretia, Needleleaf navarretia
native
Annual herb 
© 2019 David Greenberger 
© 2019 Bob Sweatt 
© 2022 Bob Sweatt |
|
Navarretia pubescens Downy pincushionplant, Purple navarretia
native
Annual herb 
© 2024 Mike Russler 
© 2023 Helen Hancock 
© 2024 Mike Russler |
|
Navarretia squarrosa Skunkbush, Skunkweed
native
Annual herb 
© 2024 Mike Russler 
© 2019 Patrick Furtado 
© 2022 Suzanne L. Weakley |
|
Nemophila maculata Five spot, Fivespot
native
Annual herb 
© 2020 Matt Berger 
© 2021 Mike Russler 
© 2022 Mike Russler |
|
Odontostomum hartwegii Hartweg's doll's lily, Hartweg's odontostomum, Odontostomum
native
Perennial herb 
© 2020 Julie A. Kierstead 
© 2022 Mike Russler 
© 2022 John Game |
|
Orobanche fasciculata Clustered broomrape
native
Perennial herb (parasitic) 
© 2016 Jim Xerogeanes 
© 2016 Jim Xerogeanes 
© 2023 Mary Ann Machi |
|
Panicum acuminatum Western panicgrass, Western panicum, Western witch grass
native
Perennial grass 
© 2017 David Greenberger 
© 2020 Julie A. Kierstead 
© 2021 R.A. Chasey |
|
Panicum hillmanii Hillman's panicgrass
non-native
Annual grass |
|
Parvisedum pumilum Sierra mock stonecrop
native
Annual herb 
© 2005 Steve Matson 
© 2021 R.A. Chasey 
© 2022 Steve Matson |
|
Paspalum distichum Knot grass, Knotgrass
native
Perennial grass 
© 2011 Steve Matson 
© 2017 Ron Vanderhoff 
© 2024 R.A. Chasey |
|
Pectocarya pusilla Little gruvelia
native
Annual herb 
© 2022 Steve Matson 
© 2022 Steve Matson 
© 2022 Steve Matson |
|
Pellaea mucronata Bird's foot fern, Birdfoot cliffbrake, Birdfoot fern
native
Fern 
© 2012 Ron Vanderhoff 
© 2022 Helen Hancock 
© 2023 Julia Markey |
|
Pentagramma triangularis Gold back fern, Goldenback fern
native
Fern 
© 2024 Steve Conger 
© 2022 Cynthia Powell 
© 2023 Julia Markey |
|
Petrorhagia prolifera Childing pink, Pink grass
non-native
Annual herb 
© 2021 Larry Dizmang 
© 2023 Mike Russler 
© 2021 Larry Dizmang |
|
Phacelia cicutaria Caterpillar phacelia
native
Annual herb 
© 2021 Steve Matson 
© 2021 Steve Matson 
© 2022 Ron Vanderhoff |
|
Phacelia imbricata Imbricate phacelia
native
Perennial herb 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2019 Steve Matson |
|
Pinus sabiniana Bull pine, California foothill pine, Gray pine
native
Tree 
© 2022 Cynthia Powell 
© 2019 Cynthia Powell 
© 2021 R.A. Chasey |
|
Plagiobothrys tenellus Pacific popcornflower, Popcorn flower, Slender popcorn flower
native
Annual herb 
© 2023 Larry Dizmang 
© 2023 Larry Dizmang 
© 2022 Mike Russler |
|
Plantago erecta California plantain, Dotseed plantain, Foothill plantain
native
Annual herb 
© 2008 Steve Matson 
© 2022 Steve Matson 
© 2022 Steve Matson |
|
Platystemon californicus Cream cups, Creamcups
native
Annual herb 
© 2017 Nathanial Wigington 
© 2022 John L. Thompson 
© 2022 John L. Thompson |
|
Plectritis ciliosa Long spurred plectritis, Longspur seablush
native
Annual herb 
© 2022 Steve Matson 
© 2005 Steve Matson 
© 2022 Steve Matson |
|
Poa pratensis Kentucky blue grass, Kentucky bluegrass
• invasive non-native
Perennial grass 
© 2024 Erin Bergman 
© 2024 Emily R. Allen 
© 2024 Emily R. Allen |
|
Poa secunda ssp. secunda One sided blue grass, Pine bluegrass, Sandberg's bluegrass
native
Perennial grass 
© 2018 Ron Vanderhoff 
© 2018 Ron Vanderhoff 
© 2018 Ron Vanderhoff |
|
Pogogyne serpylloides Thyme leaf mesa mint, Thymeleaf mesamint
native
Annual herb 
© 2020 Stacie Wolny 
© 2022 R.A. Chasey 
© 2020 Stacie Wolny |
|
Polygonum californicum California knotweed
native
Annual herb 
© 2019 David Greenberger 
© 2022 BOB CASE 
© 2004 Steve Matson |
|
Polygonum persicaria Spotted ladysthumb
non-native
Annual herb 
© 2020 R.A. Chasey 
© 2021 joaquin hale 
© 2021 joaquin hale |
|
Polypogon monspeliensis Annual beard grass, Rabbitsfoot grass
• invasive non-native
Annual grass 
© 2008 Steve Matson 
© 2014 Steve Matson 
© 2008 Steve Matson |
|
Potamogeton foliosus Leafy pondweed
native
Perennial herb (aquatic) 
© 2016 Robert L. Carr 
© 2016 Robert L. Carr 
© 2016 Robert L. Carr |
|
Pseudobahia heermannii Foothill sunburst, Heermann's golden sunburst
native
Annual herb 
© 2019 Jacob Smith 
© 2019 Jacob Smith 
© 2019 Jacob Smith |
|
Psilocarphus brevissimus var. brevissimus Short woollyheads, Woolly heads, Woolly marbles
native
Annual herb 
© 2020 R.A. Chasey 
© 2021 David popp 
© 2020 Ron Vanderhoff |
|
Pteridium aquilinum var. pubescens Hairy brackenfern, Western bracken fern
native
Fern 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2022 Bob Sweatt |
|
Pterostegia drymarioides Fairy mist, Woodland threadstem
native
Annual herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2005 Steve Matson |
|
Quercus douglasii Blue oak
native
Tree 
© 2018 Gary McDonald 
© 2020 Charles Russell 
© 2019 Susan McDougall |
|
Quercus wislizeni var. wislizeni Interior live oak
native
Tree, Shrub 
© 2018 Jay Chamberlain 
© 2019 Jay Chamberlain 
© 2020 Susan McDougall |
|
Ranunculus californicus California buttercup
native
Perennial herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Ranunculus occidentalis Western buttercup
native
Perennial herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2003 Steve Matson |
|
Rhamnus ilicifolia Evergreen buckthorn, Hollyleaf redberry
native
Shrub 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2006 Steve Matson |
|
Rhamnus tomentella ssp. tomentella Hoary coffeeberry
native
Shrub 
© 2020 R.A. Chasey 
© 2016 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Ribes malvaceum Chaparral currant
native
Shrub 
© 2020 Bryant Baker 
© 2020 Bryant Baker 
© 2020 Bryant Baker |
|
Rigiopappus leptocladus Rigiopappus, Wire weed, Wireweed
native
Annual herb 
© 2021 Steve Laymon 
© 2021 Steve Laymon 
© 2022 John Rawlings |
|
Rubus armeniacus Himalayan blackberry, black berry, Armenian blackberry
• invasive non-native
Shrub 
© 2014 James Gonsman 
© 2018 Richard Spjut 
© 2013 Michael Mitchell |
|
Rumex conglomeratus Clustered dock, Green dock
non-native
Perennial herb 
© 2020 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Rumex crispus Curly dock, Curly leaved dock, Rhubarb
• invasive non-native
Perennial herb 
© 2018 Tim Lewis 
© 2019 Diane Etchison 
© 2023 Ron Vanderhoff |
|
Rumex pulcher Fiddle dock
non-native
Perennial herb 
© 2020 Ryan Carle 
© 2022 Chris McDonald 
© 2021 David popp |
|
Sagina apetala Annual pearlwort, Dwarf pearlwort, Sticky pearlwort
non-native
Annual herb 
© 2022 Donald Burk 
© 2022 Donald Burk 
© 2023 R.A. Chasey |
|
Sagittaria latifolia Broad leaf arrowhead, Broadleaf arrowhead, Wappato
native
Perennial herb (aquatic)  © Tim Messick  © 2018 Tim Messick  © 2005 Lisa Powers |
|
Salix laevigata Polished willow, Red willow
native
Tree 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
|
Salix lasiolepis Arroyo willow
native
Tree, Shrub 
© 2019 Steve Matson 
© 2022 Ron Vanderhoff 
© 2020 Steve Matson |
|
Salix melanopsis Dusky willow
native
Tree, Shrub 
© 2014 Shawna Martinez 
© 2017 Susan Kotelnicki 
© 2025 Mike Russler |
|
Sambucus mexicana Blue elderberry
native
Tree, Shrub 
© 2021 Mike Russler 
© 2020 Diane Etchison 
© 2022 El Byrne |
|
Sanicula bipinnatifida Purple sanicle, Snakeroot, Purple Sanicle, Shoe Buttons
native
Perennial herb 
© 2019 Diane Etchison 
© 2018 Gary McDonald 
© 2021 Robin Carter |
|
Sanicula tuberosa Tuberous sanicle, Turkey pea
native
Perennial herb 
© 2023 R.A. Chasey 
© 2023 R.A. Chasey 
© 2023 R.A. Chasey |
|
Saxifraga sp. Small Tree-Mallow
|
|
Scirpus americanus Chairmaker's bulrush
native
Perennial grasslike herb 
© 2021 Ron Vanderhoff 
© 2016 Joan Hampton 
© 2020 Ron Vanderhoff |
|
Scleranthus annuus ssp. annuus German knotgrass, Knawel, Scleranthus
non-native
Annual herb 
© 2021 Steve Matson 
© 2021 Steve Matson 
© 2021 Steve Matson |
|
Scribneria bolanderi Scribner's grass, Scribneria
native
Annual grass 
© 2022 John Rawlings 
© 2020 Ken Hickman 
© 2023 R.A. Chasey |
|
Scrophularia californica California bee plant, California figwort
native
Perennial herb 
© 2020 Bob Sweatt 
© 2006 Steve Matson 
© 2019 Cynthia Powell |
|
Selaginella hansenii Hansen's spike moss, Hansen's spikemoss
native
© 2021 Steve Matson 
© 2021 Steve Matson 
© 2021 Steve Matson |
|
Senecio clevelandii var. heterophyllus Red hills ragwort
• rare native
Perennial herb |
|
Senecio layneae Layne's ragwort
• rare native
Perennial herb 
© 2020 Matt Berger 
© 2022 Charles Russell 
© 2021 Debra Ayres |
|
Sidalcea calycosa Annual checkerbloom, Checker mallow, Pt. reyes sidalcea
native
Annual herb 
© 2023 Charles Smith 
© 2023 Alaine Arslan 
© 2019 David popp |
|
Sidalcea hartwegii Hartweg sidalcea, Hartweg's checkerbloom, Valley checkerbloom
native
Annual herb 
© 2017 David Greenberger 
© 2024 Alaine Arslan 
© 2022 Mike Russler |
|
Sidalcea malviflora ssp. asprella Harsh checkerbloom, sierra foothills checkerbloom
native
Perennial herb 
© 2019 Verna Jigour 
© 2019 Verna Jigour 
© 2023 David popp |
|
Silene gallica Common catchfly, Windmill pink
non-native
Annual herb 
© 2019 Mary Wloch 
© 2017 Gary McDonald 
© 2019 Gary McDonald |
|
Sisyrinchium bellum Western blue eyed grass
native
Perennial herb 
© 2024 Steve Conger 
© 2024 Ron Vanderhoff 
© 2019 Stacie Wolny |
|
Solanum xanti Chaparral nightshade, Nightshade, Purple nightshade
native
Perennial herb, Shrub 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2008 Steve Matson |
|
Soliva sessilis Common soliva, Field burrweed, South american soliva
non-native
Annual herb 
© 2023 R.A. Chasey 
© 2019 Abbot Chambers 
© 2019 Abbot Chambers |
|
Sonchus asper ssp. asper Prickly sow thistle, Sow thistle
• invasive non-native
Annual herb 
© 2014 Gary McDonald 
© 2022 Ron Vanderhoff 
© 2014 Gary McDonald |
|
Sorghum halepense Johnsongrass
• invasive non-native
Perennial grass  © 2014 Robert F Norris 
© 2019 Jennifer Mo 
© 2020 Julie A. Kierstead |
|
Spergularia rubra Purple sand spurry, Red sandspurry, Ruby sandspurry
non-native
Annual, Perennial herb 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Stachys stricta Sonoma hedge nettle, Sonoma hedgenettle
native
Perennial herb 
© 2024 Donald Burk 
© 2012 george jackson 
© 2012 george jackson |
|
Stellaria nitens Shining chickweed, Shiny chickweed, Smooth chickweed
native
Annual herb 
© 2022 Catherine Chang 
© 2023 Ron Vanderhoff 
© 2020 Ken Hickman |
|
Stephanomeria virgata Rod wirelettuce, Tall stephanomeria, Twiggy wreath plant
native
Annual herb 
© 2022 Cynthia Powell 
© 2019 Steven M Norris 
© 2022 Helen Hancock |
|
Streptanthus polygaloides Milkwort jewelflower
native
Annual herb 
© 2019 Belinda Lo 
© 2023 Mike Russler 
© 2019 Alison Sheehey |
|
Thysanocarpus curvipes Fringe pod, Fringed pod, Hairy lacepod
native
Annual herb 
© 2019 Steve Matson 
© 2014 Steve Matson 
© 2016 Steve Matson |
|
Toxicodendron diversilobum Poison oak, Poisonoak, Western Poison Oak
native
Vine, Shrub 
© 2020 Ron Vanderhoff 
© 2019 Randy Huey 
© 2025 Mike Russler |
|
Trichostema rubisepalum Hernandez bluecurls
• rare native
Annual herb 
© 2021 Mike Russler 
© 2021 Mike Russler 
© 2021 Mike Russler |
|
Trifolium campestre Field clover, Low hop clover
non-native
Annual herb 
© 2024 R.A. Chasey 
© 2023 R.A. Chasey 
© 2021 R.A. Chasey |
|
Trifolium ciliolatum Foothill clover, Tree clover
native
Annual herb 
© 2005 Steve Matson 
© 2005 Steve Matson 
© 2019 Rachelle Gray |
|
Trifolium depauperatum Cowbag clover, Dwarf sack clover, Pale sack clover
native
Annual herb 
© 2021 Steve Matson 
© 2021 Steve Matson 
© 2022 Ken-ichi Ueda |
|
Trifolium hirtum Rose clover
• invasive non-native
Annual herb 
© 2011 Steve Matson 
© 2011 Steve Matson 
© 2011 Steve Matson |
|
Trifolium microcephalum Hairy clover, Small headed clover
native
Annual herb 
© 2005 Steve Matson 
© 2016 Michael Mitchell 
© 2019 Ron Vanderhoff |
|
Trifolium microdon Thimble clover, Valparaiso clover
native
Annual herb 
© 2022 Dee Shea Himes 
© 2023 R.A. Chasey 
© 2025 Bill Kress |
|
Trifolium variegatum Variegated clover, White tipped clover, Whitetip clover
native
Annual herb 
© 2022 Steve Matson 
© 2017 Michael Mitchell 
© 2019 Diane Etchison |
|
Trifolium willdenovii Tomcat clover
native
Annual herb 
© 2024 Steve Conger 
© 2024 Steve Conger 
© 2018 Stacie Wolny |
|
Triphysaria eriantha Butter 'n' eggs, Johnny tuck, Johnnytuck
native
Annual herb 
© 2021 Steve Matson 
© 2021 Steve Matson 
© 2024 Alaine Arslan |
|
Triphysaria pusilla Dwarf owl's clover, Little owl's clover
native
Annual herb 
© 2018 Steve Matson 
© 2018 Steve Matson 
© 2018 Steve Matson |
|
Triteleia bridgesii Bridges' brodiaea
native
Perennial herb 
© 2016 Steve Matson 
© 2009 Bob Case 
© 2009 Bob Case |
|
Triteleia hyacinthina White brodiaea, Wild hyacinth, White Brodiaea, Fool's Onion
native
Perennial herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2008 Steve Matson |
|
Triteleia laxa Ithuriel's spear
native
Perennial herb 
© 2018 Gary McDonald 
© 2018 Tim Lewis 
© 2019 Matt Berger |
|
Typha angustifolia Nail rod, Narrow leaf cattail, Narrowleaf cattail
non-native
Perennial herb (aquatic) 
© 2019 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Typha latifolia Broadleaf cattail, Common cattail, Soft flag
native
Perennial herb (aquatic) 
© 2013 Steve Matson 
© 2013 Steve Matson 
© 2013 Steve Matson |
|
Uropappus lindleyi Silver puffs, Uropappus
native
Annual herb 
© 2019 Zack Abbey 
© 2019 Ron Vanderhoff 
© 2016 Ron Vanderhoff |
|
non-native
Annual herb 
© 2020 Ken Hickman 
© 2020 Ken Hickman 
© 2020 Ken Hickman |
|
Verbascum blattaria Moth mullein
non-native
Perennial herb 
© 2024 Mike Russler 
© 2019 Marisa Persaud 
© 2019 Patrick Furtado |
|
Verbena californica California vervain, Red hills vervain
• rare native
Perennial herb 
© 2019 David Greenberger 
© 2024 Mike Russler 
© 2024 Mike Russler |
|
Verbena officinalis Herb of the cross
non-native
Perennial herb 
© 2013 Ron Vanderhoff  © 1995 Saint Mary's College of California  © 2017 Ron Vanderhoff |
|
Veronica americana American brooklime, American speedwell, Brooklime
native
Perennial herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Veronica anagallis-aquatica Water speedwell
non-native
Perennial herb 
© 2015 Steve Matson 
© 2015 Steve Matson 
© 2015 Steve Matson |
|
Vicia sativa Spring vetch
non-native
Annual herb, Vine 
© 2022 David Wolfson 
© 2019 Cynthia Powell 
© 2023 Ron Vanderhoff |
|
Vulpia bromoides Brome fescue
non-native
Annual grass 
© 2022 Diana Wahl 
© 2021 Toni Corelli 
© 2021 David popp |
|
Vulpia microstachys var. ciliata Small fescue
native
Annual grass 
© 2011 Steve Matson 
© 2024 Emily R. Allen 
© 2011 Steve Matson |
|
Vulpia microstachys var. confusa Small fescue
native
Annual grass
© 2011 Steve Matson
© 2024 Emily R. Allen
© 2011 Steve Matson |
|
Vulpia microstachys var. microstachys Small fescue
native
Annual grass
© 2011 Steve Matson
© 2024 Emily R. Allen
© 2011 Steve Matson |
|
Vulpia microstachys var. pauciflora Small fescue
native
Annual grass
© 2011 Steve Matson
© 2024 Emily R. Allen
© 2011 Steve Matson |
|
Vulpia myuros Rattail sixweeks grass
• invasive non-native
Annual grass 
© 2021 Aaron Echols 
© 2021 Ron Vanderhoff 
© 2022 John Rawlings |
|
Vulpia myuros var. hirsuta Rattail sixweeks grass
• invasive non-native
Annual grass
© 2021 Aaron Echols
© 2021 Ron Vanderhoff
© 2022 John Rawlings |
|
Xanthium strumarium Rough cockleburr
native
Annual herb 
© 2011 Steve Matson 
© 2011 Steve Matson 
© 2011 Steve Matson |
|
Zannichellia palustris Horned pondweed
native
Perennial herb 
© 2021 Ron Vanderhoff 
© 2020 Donald Burk 
© 2021 Ron Vanderhoff |
