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| The CA Invasive Plant Inventory categorizes non-native invasive plants that threaten the state's wildlands. Categorization is based on an assessment of the ecological impacts, invasiveness, and distribution of each plant. www.cal-ipc.org/ip/inventory | ||||||
| 304 PLANTS |
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Acacia baileyana Bailey acacia, Cootamundra wattle
• invasive non-native
Tree, Shrub 
© 2020 Jutta Burger 
© 2020 John Rawlings 
© 2020 John Rawlings |
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Acacia cyclops Coastal wattle, Cyclops acacia
• invasive non-native
Shrub 
© 2023 Ron Vanderhoff 
© 2018 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Acacia dealbata Silver wattle
• invasive non-native
Tree, Shrub 
© 2019 Gary McDonald 
© 2023 Ron Vanderhoff 
© 2024 Donald Burk |
|
Acacia melanoxylon Blackwood acacia
• invasive non-native
Tree 
© 2022 Julian Geoghegan 
© 2019 Julian Geoghegan 
© 2023 Jennifer Mo |
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Acacia paradoxa Kangaroo thorn
• invasive non-native
Shrub 
© 2022 Rocky Bajada 
© 2022 Katherine Stratton 
© 2022 Katherine Stratton |
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Acacia pycnantha Golden wattle
• invasive non-native
Tree, Shrub 
© 2023 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
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Acaena novae-zelandiae Biddy biddy
• invasive non-native
Shrub (stem succulent) 
© 2023 Patrick Hoffman 
© 2024 Patrick Hoffman 
© 2018 Hayley Ross |
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Aegilops cylindrica Jointed goat grass, Jointed goatgrass
• invasive non-native
Annual grass 
© 2021 Aleksandra Evert 
© 2021 Jacob Smith 
© 2018 MCOSD Restoration Crew |
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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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Ageratina adenophora Sticky snakeroot, Thoroughwort
• invasive non-native
Perennial herb 
© 2019 Ron Vanderhoff 
© 2017 Keir Morse 
© 2019 Ron Vanderhoff |
|
Agrostis avenacea Pacific bentgrass
• invasive non-native
Perennial grass 
© 2021 John Rawlings 
© 2016 Andrew Longman 
© 2022 Donald Burk |
|
Agrostis stolonifera Creeping bentgrass, Redtop
• invasive non-native
Perennial grass 
© 2018 Rachelle Gray 
© 2018 Rachelle Gray 
© 2018 Rachelle Gray |
|
Ailanthus altissima Ailanthus, Tree of heaven
• invasive non-native
Tree 
© 2022 Jenny Gossett 
© 2022 Jenny Gossett 
© 2020 Julie A. Kierstead |
|
Alopecurus pratensis Meadow foxtail
• invasive non-native
Perennial grass 
© 2022 Mike Russler 
© 2023 R.A. Chasey 
© 2015 David Greenberger |
|
Alternanthera philoxeroides Alligator weed, Alligatorweed
• invasive non-native
Perennial herb 
© 2019 Robin Carter 
© 2023 Ron Vanderhoff 
© 2024 Mike Russler |
|
Ambrosia trifida Giant ragweed
• invasive non-native
Annual herb  © 2015 Richard Spellenberg  © 2008 Louis-M. Landry  © 2010 Jean Pawek |
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Ammophila arenaria Beachgrass, European beach grass, European beachgrass
• invasive non-native
Perennial grass 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Anthoxanthum odoratum Sweet vernal grass, Sweet vernalgrass
• invasive non-native
Annual, Perennial grass 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
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Araujia sericifera Bladderflower
• invasive non-native
Perennial herb, Vine 
© 2019 Ron Vanderhoff 
© 2021 Jennifer Mo 
© 2020 Ron Vanderhoff |
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Arctotheca calendula Cape weed
• invasive non-native
Annual, Perennial herb 
© 2021 Patrick Hoffman 
© 2023 Nancy Poss 
© 2016 Andrea Pickart |
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Arctotheca prostrata prostrate cape weed, creeping capeweed
• invasive non-native
Annual, Perennial herb 
© 2024 David Wolfson 
© 2020 Lenihan Mazur 
© 2021 David Wolfson |
|
Arundo donax Giant reed
• invasive non-native
Perennial grass 
© 2013 Miriam Sachs Martin 
© 2020 Jennifer Mo 
© 2018 Ron Vanderhoff |
|
Asparagus asparagoides African asparagus fern
• invasive non-native
Vine 
© 2023 Cynthia Powell 
© 2018 Ron Vanderhoff 
© 2022 Joan Miller |
|
Asphodelus fistulosus Asphodel, Onionweed
• invasive non-native
Perennial herb 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2019 Ron Vanderhoff |
|
Atriplex semibaccata Australian saltbush
• invasive non-native
Perennial herb 
© 2015 James Bailey 
© 2021 David Wolfson 
© 2020 Ron Vanderhoff |
|
Avena barbata Slender oat, Slim oat
• invasive non-native
Annual grass 
© 2018 Julian Geoghegan 
© 2023 David popp 
© 2019 Ron Vanderhoff |
|
Avena fatua Wild oat, Wildoat
• invasive non-native
Annual grass 
© 2018 Gary McDonald 
© 2023 Ron Vanderhoff 
© 2023 Matt Berger |
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Bassia hyssopifolia Five horn bassia, Fivehorn smotherweed
• invasive non-native
Annual herb 
© 2023 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2022 Bob Sweatt |
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Bellardia trixago Mediterranean lineseed
• invasive non-native
Annual herb 
© 2016 Michael Mitchell 
© 2016 Michael Mitchell 
© 2015 jamie smith |
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Berberis darwinii Darwin's berberis
• invasive non-native
Shrub 
© 2018 Abbot Chambers 
© 2016 Greg O'Connell 
© 2022 David Strauch |
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Berteroa incana Hoary alyssum
• invasive non-native
Annual herb 
© 2016 Ed King  © 2022 jalopy 
© 2018 Michael Plotz |
|
Brachypodium distachyon False brome, Purple false brome
• invasive non-native
Annual, Perennial grass 
© 2019 Ron Vanderhoff 
© 2021 John Rawlings 
© 2019 Ron Vanderhoff |
|
Brachypodium sylvaticum Slender false brome
• invasive non-native
Perennial grass 
© 2018 Ecological Concerns Inc 
© 2021 SMCP NRM Intern 
© 2020 John Rawlings |
|
Brassica nigra Black mustard
• invasive non-native
Annual herb 
© 2021 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
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Brassica rapa Common mustard, Field mustard, Rape mustard
• invasive non-native
Annual herb 
© 2024 David Wolfson 
© 2021 Diane Etchison 
© 2018 Angelique Herman |
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Brassica tournefortii Saharan mustard
• invasive non-native
Annual herb 
© 2023 Julia Markey 
© 2018 Jeffrey Black 
© 2021 Ron Vanderhoff |
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Briza maxima Big quaking grass, Big quakinggrass, Rattlesnake grass
• invasive non-native
Annual grass 
© 2017 Gary McDonald 
© 2018 Bill Schmidt 
© 2017 Gary McDonald |
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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 japonicus Downy sheathed cheat, Hairy chess, Japanese brome
• invasive non-native
Annual grass  © 2005 Steve Matson  © 2005 Steve Matson  © 2005 Steve Matson |
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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 tectorum Cheatgrass, downy brome, Downy brome grass, Downy chess
• invasive non-native
Annual grass 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
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Buddleja davidii Butterfly bush, Summer lilac
• invasive non-native
Tree, Shrub 
© 2021 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
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Cakile maritima European searocket, Sea rocket
• invasive non-native
Annual herb 
© 2019 Diane Etchison 
© 2021 R.A. Chasey 
© 2019 Diane Etchison |
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Carduus acanthoides Plumeless thistle, Spiny plumeless thistle
• invasive non-native
Perennial herb 
© 2016 Catherine Talbot 
© 2016 Catherine Talbot 
© 2015 Catherine Talbot |
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Carduus nutans Musk thistle, Nodding plumeless thistle
• invasive non-native
Perennial herb 
© 2022 Bob Sweatt 
© 2022 Bob Sweatt 
© 2022 Bob Sweatt |
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Carduus pycnocephalus Italian thistle
• invasive non-native
Annual herb 
© 2019 Gary McDonald 
© 2023 Diana Wahl 
© 2023 Ron Vanderhoff |
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Carduus tenuiflorus Italian thistle, Slender flowered thistle, Winged plumeless thistle
• invasive non-native
Annual herb 
© 2018 Gary McDonald 
© 2018 Gary McDonald 
© 2023 Cynthia Powell |
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Carex pendula Hanging sedge
• invasive non-native
Perennial grasslike herb 
© 2015 Andrea Williams 
© 2022 Mitchell Blake 
© 2021 R.A. Chasey |
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Carpobrotus chilensis Sea fig
• invasive non-native
Perennial herb 
© 2018 Nicole Leatherman 
© 2016 Steve Matson 
© 2021 Cynthia Powell |
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Carpobrotus edulis Hottentot fig, Iceplant, Sea fig
• invasive non-native
Perennial herb 
© 2021 Michelle Karle 
© 2017 Lisa Miller 
© 2018 Michael Chasse |
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Carrichtera annua Wards weed
• invasive non-native
Annual herb 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
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Carthamus lanatus Woolly distaff thistle
• invasive non-native
Annual herb 
© 2019 Lenihan Mazur 
© 2019 Danielle Carney 
© 2019 Danielle Carney |
|
Casuarina equisetifolia Australian Pine, Beach sheoak
• invasive non-native
Tree 
© 2018 Zoya Akulova 
© 2015 Zoya Akulova 
© 2017 MCOSD EDRR |
|
Catharanthus roseus Madagascar periwinkle
• invasive non-native
Shrub (stem succulent) 
© 2020 Karla Navarro  © Nick Kurzenko  © 2005 Luigi Rignanese |
|
Cenchrus echinatus Southern sandbur
• invasive non-native
Annual grass 
© 2017 Ron Vanderhoff 
© 2018 michelle peruzzi 
© 2017 Fred Melgert / Carla Hoegen |
|
Cenchrus longispinus Mat sandbur
• invasive non-native
Annual grass 
© 2018 James Bailey 
© 2018 Ron Vanderhoff 
© 2018 Ron Vanderhoff |
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Centaurea calcitrapa Purple star thistle, Red star thistle
• invasive non-native
Annual, Perennial herb 
© 2021 R.A. Chasey 
© 2019 MCOSD EDRR 
© 2022 R.A. Chasey |
|
Centaurea diffusa Diffuse knapweed, White knapweed
• invasive non-native
Perennial herb 
© 2020 David Greenberger 
© 2022 Bob Sweatt 
© 2019 Catherine Talbot |
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Centaurea diluta North African knapweed, Star thistle
• invasive non-native
Annual herb 
© 2020 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2018 James Bailey |
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Centaurea jacea ssp. pratensis Meadow knapweed
• invasive non-native
Annual, Perennial herb 
© 2019 Jonathan Lee 
© 2022 Patrick Hoffman 
© 2022 Patrick Hoffman |
|
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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Centaurea solstitialis Barnaby's thistle, Yellow star thistle
• invasive non-native
Annual herb 
© 2022 Cynthia Powell 
© 2019 Arlee Montalvo 
© 2022 Mary Herr |
|
Centaurea stoebe ssp. micranthos Spotted knapweed
• invasive non-native
Perennial herb 
© 2021 Patrick Hoffman 
© 2024 Joan Miller 
© 2024 Joan Miller |
|
Centaurea virgata var. squarrosa Squarrose knapweed
• invasive non-native
Perennial herb 
© 2013 Gerald Carr 
© 2013 Gerald Carr 
© 2013 Gerald Carr |
|
Cestrum parqui Chilean jessamine
• invasive non-native
Tree 
© 2011 Michael Perlmutter 
© 2011 Michael Perlmutter 
© 2011 Michael Perlmutter |
|
Chasmanthe floribunda African cornflag, Chasmanthe
• invasive non-native
Perennial herb 
© 2024 Ron Vanderhoff 
© 2024 Ron Vanderhoff 
© 2017 Ron Vanderhoff |
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Chondrilla juncea Hogbite, Skeleton weed
• invasive non-native
Perennial herb 
© 2021 George Williams 
© 2024 Mike Russler 
© 2021 Bob Sweatt |
|
• invasive non-native
© 2022 Ron Vanderhoff 
© 2018 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
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Cirsium arvense Canada thistle
• invasive non-native
Perennial herb 
© 2012 Michael Mitchell 
© 2012 Michael Mitchell 
© 2022 Donald Burk |
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Cirsium vulgare Bull thistle
• invasive non-native
Perennial herb 
© 2017 James Bailey 
© 2020 Bob Sweatt 
© 2020 Bob Sweatt |
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Clematis vitalba Old man's beard, Traveller's joy
• invasive non-native
Vine 
© 2015 ken moore 
© 2019 Cynthia Powell 
© 2015 Ellen Uhler |
|
Colocasia esculenta Taro root
• invasive non-native
Perennial herb 
© 2017 Ron Vanderhoff 
© 2018 Ron Vanderhoff 
© 2018 Ron Vanderhoff |
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Conicosia pugioniformis False ice plant, Narrow leaved iceplant
• invasive non-native
Perennial herb 
© 2022 Mike Russler 
© 2022 Mike Russler 
© 2022 Mike Russler |
|
Conium maculatum Poison hemlock
• invasive non-native
Perennial herb 
© 2024 Cynthia Powell 
© 2013 Toni Corelli 
© 2016 Cynthia Powell |
|
Cordyline australis Cabbage tree
• invasive non-native
Tree 
© 2013 UCSC Weed Management Group 
© 2021 Ramona Robison 
© 2019 Lenihan Mazur |
|
Cortaderia jubata Pampas grass, Purple pampas grass, Pampasgrass
• invasive non-native
Perennial grass 
© 2018 Ramona Robison 
© 2021 Michelle Karle 
© 2022 Michelle Karle |
|
Cortaderia selloana Uruguayan pampas grass
• invasive non-native
Perennial grass 
© 2023 Cynthia Powell 
© 2023 Randall English 
© 2022 Ron Vanderhoff |
|
Cotoneaster franchetii Cotoneaster, Francheti cotoneaster, Orange cotoneaster
• invasive non-native
Shrub 
© 2021 Cynthia Powell 
© 2021 Lenihan Mazur 
© 2024 Morgan Stewart |
|
Cotoneaster lacteus Milkflower cotoneaster
• invasive non-native
Shrub 
© 2019 Ron Vanderhoff 
© 2022 John Doyen 
© 2019 Ron Vanderhoff |
|
Cotoneaster pannosus Cotoneaster, Silverleaf cotoneaster, Woolly cotoneaster
• invasive non-native
Shrub 
© 2021 David Wolfson 
© 2024 Diana Wahl 
© 2024 Laguna Canyon Foundation |
|
Cotula coronopifolia Brass buttons, Common brassbuttons
• invasive non-native
Perennial herb 
© 2022 Steve Matson 
© 2022 Steve Matson 
© 2018 Adam Chasey |
|
Crataegus monogyna Hawthorn
• invasive non-native
Shrub 
© 2022 Emily R. Allen 
© 2021 Isaac Kreger 
© 2021 Sherry Adams |
|
Crocosmia Xcrocosmiiflora Coppertips, Montbretia, Falling stars
• invasive non-native
Perennial herb 
© 2014 Andrea Williams 
© 2023 Leah Lord 
© 2019 George Wing |
|
Crupina vulgaris Bearded creeper, Common crupina
• invasive non-native
Annual herb 
© 2023 Norm Macdonald 
© 2012 Ramona Robison 
© 2015 Daniel Lay |
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Cynara cardunculus Artichoke thistle, Cardoon
• invasive non-native
Perennial herb 
© 2021 R.A. Chasey 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
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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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Cynoglossum officinale Gypsyflower, Hound's tongue, Purple houndstongue
• invasive non-native
Perennial herb 
© 2019 Raymond Gill 
© 2019 Raymond Gill 
© 2019 Raymond Gill |
|
Cynosurus echinatus Annual dogtail, Bristly dogstail grass, Dogtail grass
• invasive non-native
Annual grass 
© 2024 R.A. Chasey 
© 2010 Julie A. Kierstead 
© 2022 Ron Vanderhoff |
|
Cytisus multiflorus Spanish broom, White spanishbroom
• invasive non-native
Shrub 
© 2024 John Fairbank 
© 2025 John Fairbank |
|
Cytisus scoparius Scotch broom, Scotchbroom
• invasive non-native
Shrub 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
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Cytisus striatus Portuguese broom, Striated broom
• invasive non-native
Shrub 
© 2019 Andy Jones 
© 2021 Cynthia Powell 
© 2021 Cynthia Powell |
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Dactylis glomerata Orchard grass, Orchardgrass
• invasive non-native
Perennial grass 
© 2003 Steve Matson 
© 2003 Steve Matson 
© 2003 Steve Matson |
|
Datura inoxia Pricklyburr
• invasive non-native
Perennial herb 
© Geoff Burleigh  © Nick Kurzenko  © 2007 Louis-M. Landry |
|
Delairea odorata Cape ivy
• invasive non-native
Perennial herb 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Descurainia sophia Flix weed, Herb sophia
• invasive non-native
Annual herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Digitalis purpurea Purple foxglove
• invasive non-native
Perennial herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Dipogon lignosus Okie bean
• invasive non-native
Perennial herb, Vine 
© 2021 Ron Vanderhoff 
© 2022 Alan Kaufmann 
© 2021 Ron Vanderhoff |
|
Dipsacus fullonum Fuller's teasel, Fullers' teasel, Wild teasel
• invasive non-native
Perennial herb 
© 2022 Morgan Stickrod 
© 2018 Alex Spencer 
© 2021 Amber Bedgood |
|
Dipsacus sativus Fuller's teasel, Indian teasel
• invasive non-native
Annual, Biennial herb 
© 2019 Danielle Carney 
© 2022 Jennifer Mo 
© 2022 David Strauch |
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Dittrichia graveolens Stinkwort
• invasive non-native
Annual herb 
© 2017 Bob Huttar 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Dittrichia viscosa False yellowhead
• invasive non-native
Perennial herb 
© 2020 Matthew Perryman 
© 2022 Brad Cook 
© 2021 Phil Calhoun |
|
Echium candicans Pride of madeira
• invasive non-native
Shrub 
© 2019 Patrick Furtado 
© 2018 Ron Vanderhoff 
© 2012 Carl Spencer |
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Echium plantagineum Salvation echium, Salvation jane, Viper's bugloss
• invasive non-native
Annual, Perennial herb 
© 2020 John Rawlings 
© 2019 Ken Hickman 
© 2011 Daniel Gluesenkamp |
|
Egeria densa Brazilian water weed, Brazilian waterweed
• invasive non-native
Perennial herb 
© 2011 Larry Norall 
© 2021 Avity Norman 
© 2023 Cat Chang |
|
Ehrharta calycina Perennial veldt grass, Perennial veldtgrass
• invasive non-native
Perennial grass 
© 2020 David Greenberger 
© 2019 Ron Vanderhoff 
© 2018 Ron Vanderhoff |
|
Ehrharta erecta Panic veldtgrass, Upright veldt grass
• invasive non-native
Perennial grass 
© 2023 Rachel Suding 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
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Ehrharta longiflora Longflowered veldtgrass
• invasive non-native
Annual grass 
© 2020 Angelique Herman 
© 2020 Angelique Herman 
© 2020 Angelique Herman |
|
Eichhornia crassipes Common water hyacinth
• invasive non-native
Perennial herb 
© 2020 Ron Vanderhoff 
© 2018 Rachelle Gray 
© 2020 HARDEEP BAINS |
|
Elaeagnus angustifolia Oleaster, Russian olive
• invasive non-native
Tree, Shrub 
© 2012 Tim Gibson 
© 2019 Joe Woods 
© 2022 Joe Woods |
|
Elymus caput-medusae Medusa head
• invasive non-native
Annual grass 
© 2023 Ron Vanderhoff 
© 2019 Jennifer Mo  © 2011 Steve Matson |
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Emex spinosa Devil's thorn, Spiny threecornerjack
• invasive non-native
Annual herb 
© 2017 Barbara Boethling 
© 2015 Ron Vanderhoff 
© 2017 Barbara Boethling |
|
Erica lusitanica Spanish heather
• invasive non-native
Shrub 
© 2021 Patrick Hoffman 
© 2022 Patrick Hoffman 
© 2022 Patrick Hoffman |
|
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 |
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Eucalyptus camaldulensis Red gum, Red river gum, River redgum
• invasive non-native
Tree 
© 2024 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
|
Eucalyptus cladocalyx Sugar gum, Sugargum
• invasive non-native
Tree 
© 2017 Keir Morse 
© 2024 Cynthia Powell 
© 2023 Randall English |
|
Eucalyptus globulus Blue gum, Tasmanian bluegum
• invasive non-native
Tree 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
|
Euphorbia lathyris Compass plant, Gopher plant, Moleplant
• invasive non-native
Annual, Perennial herb 
© 2017 Aaron Echols 
© 2021 Mike Russler  © adiantumluz |
|
Euphorbia oblongata Eggleaf spurge
• invasive non-native
Perennial herb 
© 2019 Michael Sturtevant 
© 2019 Randy Huey 
© 2017 Gary McDonald |
|
Euphorbia terracina carnation spurge, Geraldton carnation weed
• invasive non-native
Perennial herb 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
|
Euphorbia virgata Leafy spurge
• invasive non-native
Perennial herb 
© 2023 Nikki Valentine 
© 2019 Lenihan Mazur 
© 2019 Lenihan Mazur |
|
Fallopia japonica Japanese knotweed
• invasive non-native
Perennial herb 
© 2021 Margot Cunningham 
© 2024 Jacob Martin 
© 2019 John Malpas |
|
Fallopia sachalinensis Giant knotweed
• invasive non-native
Perennial herb 
© 2024 Patrick Hoffman 
© 2024 Patrick Hoffman 
© 2023 John Malpas |
|
Fallopia Xbohemica Bohemian knotweed
• invasive non-native
Perennial herb 
© 2018 Scot Loring 
© 2018 Scot Loring 
© 2018 Scot Loring |
|
Festuca arundinacea Alta fescue, Reed fescue, Tall fescue
• invasive non-native
Perennial grass 
© 2022 Cynthia Powell 
© 2020 Robert Steers 
© 2017 MCOSD EDRR |
|
Festuca myuros Rattail sixweeks grass
• invasive non-native
Annual grass 
© 2021 Aaron Echols 
© 2021 Ron Vanderhoff 
© 2022 John Rawlings |
|
Festuca perennis Italian rye grass
• invasive non-native
Annual, Perennial grass 
© 2019 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Ficus carica Common fig, Edible fig
• invasive non-native
Tree 
© 2019 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2018 Vicki Salazar |
|
Foeniculum vulgare Biscuit root, Sweet fennel
• invasive non-native
Perennial herb 
© 2019 Ron Vanderhoff 
© 2023 Fred Roberts 
© 2022 Ryan O'Dell |
|
Galega officinalis Professor-weed
• invasive non-native
Perennial herb 
© 2017 Gerald Carr 
© 2017 Gerald Carr 
© 2017 Gerald Carr |
|
Gazania linearis Gazania, Treasure flower, Treasureflower
• invasive non-native
Perennial herb 
© 2016 Barbara Boethling 
© 2018 Ron Vanderhoff 
© 2018 Ron Vanderhoff |
|
Genista linifolia Mediterranean broom
• invasive non-native
Shrub 
© 2017 B.J. Dion 
© 2017 B.J. Dion 
© 2017 B.J. Dion |
|
Genista monosperma Bridal broom
• invasive non-native
Shrub 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Genista monspessulana French broom
• invasive non-native
Shrub 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2021 Michelle Karle |
|
Geranium dissectum Cranesbill, Cut leaved geranium, Cutleaf geranium
• invasive non-native
Annual herb 
© 2021 Al Keuter 
© 2024 Mike Russler 
© 2014 Bryan Derr |
|
Geranium lucidum Shiny geranium, Shining geranium
• invasive non-native
Annual, Biennial herb 
© 2025 Mary Ann Machi 
© 2021 Susan Fawcett 
© 2025 Mary Ann Machi |
|
Geranium purpureum little Robin
• invasive non-native
Annual, Biennial herb 
© 2020 Jennifer Mo 
© 2023 Al Keuter 
© 2019 Cynthia Powell |
|
Glebionis coronaria Crown daisy
• invasive non-native
Annual herb 
© 2019 Nicole Leatherman 
© 2018 Rachelle Gray 
© 2022 Jennifer Mo |
|
Glyceria declinata Waxy mannagrass
• invasive non-native
Perennial grass 
© 2021 David popp 
© 2024 John Rawlings 
© 2022 David popp |
|
Grevillea robusta Silkoak
• invasive non-native
Tree 
© 2021 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Gunnera tinctoria Chilean gunnera
• invasive non-native
Perennial herb (aquatic) 
© 2011 Michael Perlmutter  © 2010 Zoya Akulova 
© 2011 Michael Perlmutter |
|
Gypsophila paniculata Baby's breath
• invasive non-native
Perennial herb  © 2010 Barry Breckling 
© 2018 Joe Woods 
© 2018 Joe Woods |
|
Halogeton glomeratus Halogeton, Saltlover
• invasive non-native
Annual herb 
© 2019 Joe Woods 
© 2019 Joe Woods 
© 2019 Caleb Cole |
|
Hedera canariensis Canary ivy, Algerian ivy
• invasive non-native
Vine 
© 2018 Sara Witt 
© 2018 Ron Vanderhoff 
© 2016 Ron Vanderhoff |
|
Hedera helix English ivy
• invasive non-native
Vine, Shrub 
© 2019 Claire Mallen 
© 2019 Ron Vanderhoff 
© 2022 Catherine Talbot |
|
Helianthus tuberosus Jerusalem artichoke
• invasive non-native
Perennial herb 
© 2019 Jennifer Mo 
© 2019 Jennifer Mo 
© 2019 Jennifer Mo |
|
Helichrysum petiolare Licorice plant
• invasive non-native
Shrub, Vine 
© 2021 Elliot Gunnison 
© 2022 Mike Russler 
© 2022 Mike Russler |
|
Heliotropium amplexicaule Clasping heliotrope
• invasive non-native
Perennial herb 
© 2014 John L. Thompson 
© 2020 Henry Inman 
© 2020 Henry Inman |
|
Helminthotheca echioides Bristly ox-tongue
• invasive non-native
Annual, Perennial herb 
© 2016 Hayley Ross 
© 2019 Rachelle Gray 
© 2012 Elizabeth Brusati |
|
Hirschfeldia incana Mediterranean hoary mustard, Short podded mustard, Summer mustard
• invasive non-native
Perennial herb 
© 2017 Gary McDonald 
© 2017 Gary McDonald 
© 2022 Ron Vanderhoff |
|
Holcus lanatus Common velvetgrass, Velvet grass, Velvetgrass
• invasive non-native
Perennial grass 
© 2019 Bill Haley 
© 2024 David popp 
© 2019 Bill Haley |
|
Hordeum marinum Seaside barley
• invasive non-native
Annual grass 
© 2015 Chris Jaster 
© 2017 Julia Dorosh 
© 2015 Chris Jaster |
|
Hordeum murinum Farmer's foxtail, Foxtail barley, Mouse barley
• invasive non-native
Annual grass 
© 2018 Gary McDonald 
© 2019 Gary McDonald 
© 2017 Gary McDonald |
|
Hydrilla verticillata Hydrilla, Waterthyme
• invasive non-native
Perennial herb 
© 2024 Ron Vanderhoff 
© 2024 Ron Vanderhoff 
© 2024 Ron Vanderhoff |
|
Hyparrhenia hirta Thatching grass
• invasive non-native
Perennial grass  © 2008 Steve Matson  © 2008 Steve Matson |
|
Hypericum androsaemum Sweet amber
• invasive non-native
Shrub 
© 2018 Zoya Akulova 
© 2023 Jennifer Mo 
© 2023 Jennifer Mo |
|
Hypericum canariense Canary island st. johnswort
• invasive non-native
Shrub 
© 2024 Ron Vanderhoff 
© 2024 Ron Vanderhoff 
© 2015 Leah Bedoian |
|
Hypericum grandifolium malfurada
• invasive non-native
Shrub 
© 2019 Jill Adams 
© 2018 Steven Cognac 
© 2019 David Greenberger |
|
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 |
|
Hypochaeris radicata Hairy cats ear, Hairy catsear, Rough cat's ear
• invasive non-native
Perennial herb 
© 2015 James Gonsman 
© 2017 Gary McDonald 
© 2016 Michael Mitchell |
|
Ilex aquifolium English holly, Holly
• invasive non-native
Tree, Shrub 
© 2021 Cynthia Powell 
© 2021 Donald Burk 
© 2019 Tatiana Manzanillo |
|
Ipomoea indica Oceanblue morning glory
• invasive non-native
Perennial herb  © Natalie Servindelamora 
© 2023 Ron Vanderhoff 
© 2020 Ellen Stearns |
|
Iris pseudacorus Horticultural iris, Paleyellow iris, Yellowflag iris
• invasive non-native
Perennial herb 
© 2020 Ron Vanderhoff 
© 2024 Ron Vanderhoff 
© 2017 Nick Graver |
|
Isatis tinctoria Dyer's woad, Dyers woad
• invasive non-native
Biennial, Perennial herb 
© 2021 Steve Matson 
© 2021 Steve Matson 
© 2021 Steve Matson |
|
Kniphofia uvaria Redhot poker
• invasive non-native
Perennial herb 
© 2022 Michael Mitchell 
© 2021 Avis Boutell 
© 2013 Michael Mitchell |
|
Kochia scoparia Common red sage, Mexican fireweed, Summer cypress
• invasive non-native
Annual herb 
© 2013 Daniel Lubin 
© 2023 R.A. Chasey 
© 2013 Daniel Lubin |
|
Lantana camara Lantana
• invasive non-native
Shrub 
© 2021 Ron Vanderhoff 
© 2022 David Strauch 
© 2022 David Strauch |
|
Lepidium appelianum Hairy whitetop
• invasive non-native
Perennial herb  © 2023 matsonburger  © 2023 matsonburger 
© 2019 Richard Spjut |
|
Lepidium chalepense Lens-podded hoary cress
• invasive non-native
Annual, Perennial herb 
© 2021 Donald Burk 
© 2021 Donald Burk 
© 2021 Ramona Robison |
|
Lepidium draba Whitetop
• invasive non-native
Perennial herb 
© 2020 Ron Vanderhoff 
© 2021 Mike Russler 
© 2020 Ron Vanderhoff |
|
Lepidium latifolium Broad leaved pepper grass, Broadleaved pepperweed, Perennial pepperweed
• invasive non-native
Perennial herb 
© 2022 Donald Burk 
© 2020 Ron Vanderhoff 
© 2020 Joel A. Germond, Psy.D. |
|
Leptospermum laevigatum Australian tea tree
• invasive non-native
Shrub 
© 2018 Emma Havstad 
© 2018 Michael Chasse 
© 2019 Patrick Furtado |
|
Leucanthemum vulgare Oxe eye daisy, Oxeye daisy
• invasive non-native
Perennial herb  © Don Loarie 
© 2019 Julian Geoghegan 
© 2017 James Gonsman |
|
Ligustrum lucidum Glossy privet
• invasive non-native
Tree, Shrub 
© 2021 Alex Nikolaou 
© 2021 Ron Vanderhoff 
© 2017 Ron Vanderhoff |
|
Limnobium laevigatum American spongeplant
• invasive non-native
Perennial herb 
© 2024 R.A. Chasey 
© 2022 Donald Burk 
© 2021 Jutta Burger |
|
Limonium duriusculum European sea lavender
• invasive non-native
Perennial herb 
© 2016 Ron Vanderhoff 
© 2016 Ron Vanderhoff 
© 2019 Amanda Swanson |
|
Limonium ramosissimum Algerian sealavender
non-native
Perennial herb 
© 2017 Ron Vanderhoff 
© 2015 Ron Vanderhoff 
© 2018 Ron Vanderhoff L. durusculum LEFT. L. ramosissimum RIGHT. |
|
Linaria dalmatica ssp. dalmatica Dalmatian toadflax
• invasive non-native
Perennial herb 
© 2021 Dennis Diaz 
© 2016 Phil Zortman 
© 2019 Caleb Cole |
|
Linaria vulgaris Butter and eggs
• invasive non-native
Perennial herb 
© 2020 Bob Sweatt 
© 2020 Bob Sweatt 
© 2020 Bob Sweatt |
|
Lobularia maritima Sweet alyssum
• invasive non-native
Perennial herb 
© 2016 Michael Mitchell 
© 2016 Michael Mitchell 
© 2019 Patrick Furtado |
|
Ludwigia hexapetala Ludwigia, Six petal water primrose
• invasive non-native
Perennial herb 
© 2009 Keith Gagomiros 
© 2021 Charles Russell 
© 2019 Ron Vanderhoff |
|
Ludwigia peploides Floating primrose willow, Floating water primrose, Marsh purslane
• invasive non-native
Perennial herb 
© 2022 David Strauch 
© 2019 Lenihan Mazur 
© 2021 Ron Vanderhoff |
|
Lythrum hyssopifolium Hyssop loosestrife
• invasive non-native
Annual, Perennial herb 
© 2019 Diane Etchison 
© 2021 Cynthia Powell 
© 2020 Ron Vanderhoff |
|
Lythrum salicaria Purple loosestrife
• invasive non-native
Perennial herb 
© 2023 Donald Burk 
© 2022 Eric Jennings 
© 2020 Katie Rian |
|
Malephora crocea Coppery mesembryanthemum
• invasive non-native
Perennial herb 
© 2022 Ron Vanderhoff 
© 2022 Daniel Huynh 
© 2021 Ron Vanderhoff |
|
Marrubium vulgare White horehound
• invasive non-native
Perennial herb 
© ©2013 Gary McDonald 
© 2015 Diane Etchison 
© 2018 Nancy Hamlett |
|
Maytenus boaria Mayten
• invasive non-native
Tree, Shrub 
© 2021 Julian Geoghegan 
© 2021 Julian Geoghegan 
© 2022 Jacob Martin |
|
Medicago polymorpha Bur clover, Bur medic, California burclover
• invasive non-native
Annual herb 
© 2019 Gary McDonald 
© 2019 Gary McDonald 
© 2019 Gary McDonald |
|
Mentha pulegium Pennyroyal
• invasive non-native
Perennial herb 
© 2023 R.A. Chasey 
© 2022 R.A. Chasey 
© 2015 Chris Jaster |
|
Mesembryanthemum crystallinum Common iceplant, Crystalline ice plant
• invasive non-native
Annual herb 
© 2019 Naomi Goegan 
© 2019 Nathan Taxel 
© 2022 David Strauch |
|
Mesembryanthemum nodiflorum Slender leaved ice plant, Slenderleaf iceplant, Small flowered iceplant
• invasive non-native
Annual herb 
© 2009 Howard Clark 
© 2017 B.J. Dion 
© 2019 Jennifer Mo |
|
Myoporum laetum Lollypop tree, Ngaio tree
• invasive non-native
Tree, Shrub 
© 2018 Ron Vanderhoff 
© 2017 James Bailey 
© 2022 Ron Vanderhoff |
|
Myosotis latifolia Broadleaf forget me not, Forget me not, Wide leaved forget me not
• invasive non-native
Perennial herb 
© 2019 Cynthia Powell 
© 2018 Tim Lewis 
© 2022 Ecological Concerns Inc |
|
Myriophyllum aquaticum Parrot feather watermilfoil, Parrot's feather, Parrotfeather
• invasive non-native
Perennial herb (aquatic) 
© 2019 Patrick Furtado 
© 2016 Ross Hinderer 
© 2019 David popp |
|
Myriophyllum spicatum American milfoil, Eurasian milfoil, Spike watermilfoil
• invasive non-native
Perennial herb 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Stipa tenuissima Finestem needlegrass, Mexican feathergrass
• invasive non-native
Perennial grass 
© 2020 Ron Vanderhoff 
© 2024 Sadie Hickey 
© 2020 Ron Vanderhoff |
|
Nicotiana glauca Tree tobacco
• invasive non-native
Tree, Shrub 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
|
Nothoscordum gracile Slender false garlic
• invasive non-native
Perennial herb 
© 2017 Ron Vanderhoff 
© 2021 Friends of Five Creeks volunteers 
© 2021 Friends of Five Creeks volunteers |
|
Olea europaea Olive
• invasive non-native
Tree, Shrub 
© 2022 Donald Burk 
© 2021 Thomas Reyes 
© 2022 Ron Vanderhoff |
|
Oncosiphon piluliferum Stinknet
non-native
Annual herb 
© 2020 Lana Nguyen 
© 2019 Ron Vanderhoff 
© 2020 Hailey Laskey |
|
Ononis alopecuroides Foxtail restharrow
• invasive non-native
Annual herb  © 2018 Joe DiTomaso  © 2018 Joe DiTomaso  © 2018 Joe DiTomaso |
|
Onopordum acanthium Scotch cottonthistle
• invasive non-native
Perennial herb 
© 2021 Diana Wing 
© 2019 Catherine Talbot 
© 2018 Joe Woods |
|
Onopordum illyricum Illyrian cottonthistle, Illyrian thistle
• invasive non-native
Annual, Biennial herb 
© 2021 Nancy Barrera 
© 2021 Nancy Barrera 
© 2021 Nancy Barrera |
|
Orobanche aegyptiaca Egyptian broomrape
• invasive non-native
Perennial herb (parasitic) |
|
Oxalis pes-caprae Bermuda buttercup, Sourgrass
• invasive non-native
Perennial herb 
© 2019 Gary McDonald 
© 2017 Angelique Herman 
© 2015 Richard Chasey |
|
Paraserianthes lophantha Plume albizia
non-native
Shrub 
© 2024 Karen Gravely 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Parentucellia viscosa Yellow glandweed, Yellow parentucellia
• invasive non-native
Annual herb 
© 2021 Janice Kuch 
© 2018 Parker Santiago 
© 2021 Mike Russler |
|
Parthenium hysterophorus Santa maria feverfew
• invasive non-native
Perennial herb 
© 2019 Nathan Taxel 
© 2019 Nathan Taxel 
© 2018 Ron Vanderhoff |
|
Paspalum urvillei Vasey's grass
• invasive non-native
Perennial grass 
© 2021 Jennifer Mo 
© 2021 Jennifer Mo 
© 2024 Donald Burk |
|
Paspalum vaginatum Seashore paspalum
• invasive non-native
Perennial grass 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2018 Ron Vanderhoff |
|
• invasive non-native
Vine 
© 2016 Patrick Nicholson 
© 2017 Ramona Robison 
© 2019 Ramona Robison |
|
Peganum harmala Harmal peganum
• invasive non-native
Perennial herb  © 2011 Debra L. Cook 
© 2021 Caleb Cole  © 2001 CDFA |
|
Pennisetum clandestinum Kikuyu grass, Kikuyugrass
• invasive non-native
Perennial grass 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2017 Josh Nuzzo |
|
Pennisetum setaceum Crimson fountaingrass, Fountaingrass
• invasive non-native
Perennial grass 
© 2021 Steve Matson 
© 2021 Steve Matson 
© 2021 Steve Matson |
|
Pennisetum villosum Feathertop
• invasive non-native
Perennial grass 
© 2018 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Persicaria wallichii Himalayan knotweed
• invasive non-native
Perennial herb 
© 2017 Redwood Community Action Agency 
© 2019 David Juliano 
© 2014 Ramona Robison |
|
Phalaris aquatica Bulbous canarygrass, Harding grass
• invasive non-native
Perennial grass 
© 2024 Michael Chasse 
© 2021 Lenihan Mazur 
© 2024 John Rawlings |
|
Phoenix canariensis Canary island date palm
• invasive non-native
Tree 
© 2020 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2021 James Bailey |
|
Phytolacca americana American pokeweed, Pokeberry
• invasive non-native
Perennial herb 
© 2009 Julie A. Kierstead 
© 2021 Donald Burk 
© 2022 Donald Burk |
|
Pittosporum undulatum Australian cheesewood, Victorian box
• invasive non-native
Tree, Shrub 
© 2018 Ron Vanderhoff 
© 2017 UCSC Weed Management Group 
© 2018 Ron Vanderhoff |
|
Plantago lanceolata English plantain, Narrow leaved plantain, Ribgrass
• invasive non-native
Perennial herb 
© 2008 Steve Matson 
© 2019 Joe Engelbrecht 
© 2021 Ken Lunders |
|
Plecostachys serpyllifolia Petite-licorice
• invasive non-native
© 2018 Ron Vanderhoff 
© 2018 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Poa pratensis Kentucky blue grass, Kentucky bluegrass
• invasive non-native
Perennial grass 
© 2024 Erin Bergman 
© 2024 Emily R. Allen 
© 2024 Emily R. Allen |
|
Polygala myrtifolia Myrtle leaf milkwort
• invasive non-native
Shrub 
© 2019 MCOSD EDRR 
© 2015 Pete Frye 
© 2017 MCOSD EDRR |
|
Polypogon monspeliensis Annual beard grass, Rabbitsfoot grass
• invasive non-native
Annual grass 
© 2008 Steve Matson 
© 2014 Steve Matson 
© 2008 Steve Matson |
|
Potamogeton crispus Crispate leaved pondweed, Curly pondweed, Cut leaved pondweed
• invasive non-native
Perennial herb (aquatic) 
© 2021 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Prunus cerasifera Cherry plum
• invasive non-native
Tree 
© 2025 Mike Russler 
© 2025 Mike Russler 
© 2025 Mike Russler |
|
Pyracantha angustifolia Narrowleaf firethorn
• invasive non-native
Shrub 
© 2018 Abbot Chambers 
© 2019 Abbot Chambers 
© 2018 Chris Qian |
|
Pyracantha coccinea Scarlet firethorn
• invasive non-native
Shrub 
© 2019 Randy Huey  © 2005 Luigi Rignanese  © 2005 Luigi Rignanese |
|
Pyracantha crenulata Nepalese firethorn
• invasive non-native
Shrub 
© 2022 Morgan Stickrod 
© 2022 Morgan Stickrod 
© 2019 Danielle Carney |
|
Pyrus calleryana Callery pear
• invasive non-native
Tree 
© 2021 Randy Huey 
© 2022 Donald Burk 
© 2017 Marabeth Grahame |
|
Ranunculus repens Creeping buttercup, Crowfoot, creeping buttercup
• invasive non-native
Perennial herb 
© 2022 Bob Sweatt 
© 2021 Norma Solarz 
© 2017 Elliot Gunnison |
|
Raphanus sativus Cultivated radish, Jointed charlock, Wild radish
• invasive non-native
Annual, Biennial herb 
© 2017 Lisa Miller 
© 2020 Ron Vanderhoff 
© 2023 Julia Markey |
|
Rhamnus alaternus Italian buckthorn
• invasive non-native
Shrub 
© 2023 Jennifer Mo 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
|
Acroptilon repens Russian knapweed
non-native
Perennial herb 
© 2017 Barbara Boethling 
© 2014 Steve Matson 
© 2017 Barbara Boethling |
|
Ricinus communis Castor bean, Castorbean
• invasive non-native
Shrub 
© 2017 Henry DiRocco 
© 2020 Aaron Echols 
© 2022 Ron Vanderhoff |
|
Robinia pseudoacacia Black locust
• invasive non-native
Tree 
© 2021 Ron Vanderhoff 
© 2021 David Wolfson 
© 2015 Ron Vanderhoff |
|
Romulea rosea Rosy sandcrocus
• invasive non-native
Perennial herb 
© 2024 David Wolfson 
© 2022 Lenihan Mazur 
© 2018 Robin Hunter |
|
Rubus armeniacus Himalayan blackberry, black berry, Armenian blackberry
• invasive non-native
Shrub 
© 2014 James Gonsman 
© 2018 Richard Spjut 
© 2013 Michael Mitchell |
|
Rumex acetosella Common sheep sorrel
• invasive non-native
Perennial herb 
© 2017 Gary McDonald 
© 2008 Steve Matson 
© 2019 Patrick Furtado |
|
Rumex crispus Curly dock, Curly leaved dock, Rhubarb
• invasive non-native
Perennial herb 
© 2018 Tim Lewis 
© 2019 Diane Etchison 
© 2023 Ron Vanderhoff |
|
Rytidosperma caespitosum Tufted wallaby grass
• invasive non-native
Perennial grass 
© 2022 Diana Wahl 
© 2019 Stephany Dery 
© 2016 Ron Vanderhoff |
|
Rytidosperma penicillatum Purple awned wallaby grass , Hairy oat grass, Poverty grass
• invasive non-native
Perennial grass 
© 2019 Eric Wrubel 
© 2024 Laura Booth 
© 2018 Sarah Inman |
|
Saccharum ravennae Ravennagrass
• invasive non-native
Perennial grass 
© 2011 Ramona Robison 
© 2009 baelin inc 
© 2022 Grace Ferguson |
|
Salpichroa origanifolia Lily of the valley vine
• invasive non-native
Perennial herb 
© 2014 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
|
Salsola paulsenii Barbwire russian thistle, Paulsen's russian thistle
• invasive non-native
Annual, Perennial herb  © 2005 Steve Matson  © 2005 James M. Andre 
© 2017 Mason Hyland |
|
• invasive non-native
Annual herb |
|
Salsola soda Alkali russian thistle, Oppositeleaf russian thistle
• invasive non-native
Annual herb 
© 2024 R.A. Chasey 
© 2022 Cynthia Powell 
© 2022 Cynthia Powell |
|
Salsola tragus Prickly russian thistle, Russianthistle, Tumbleweed
• invasive non-native
Annual herb 
© 2017 Ron Vanderhoff 
© 2018 Angelique Herman 
© 2023 Cynthia Powell |
|
Salvia aethiopis Mediterranean sage
• invasive non-native
Perennial herb 
© 2018 Matt Berger 
© 2024 Alaine Arslan 
© 2024 Alaine Arslan |
|
Salvinia molesta Kariba weed
• invasive non-native
Annual, Perennial herb  © 2010 Barry Rice  © 2009 Barry Rice  © 2009 Barry Rice |
|
Saponaria officinalis Bouncing bet, Bouncingbet, Soapwort
• invasive non-native
Perennial herb 
© 2020 Bob Sweatt 
© 2022 Mike Russler 
© 2022 Mike Russler |
|
Scabiosa atropurpurea Pincushion flower, Pincushion plant, Pincushions
• invasive non-native
Annual herb 
© 2021 Ken Lunders 
© 2021 Mike Russler 
© 2021 Ken Lunders |
|
Schinus molle Peruvian pepper tree, Peruvian peppertree
• invasive non-native
Tree 
© 2021 stephen rosenthal 
© 2017 William McCarey 
© 2023 Ron Vanderhoff |
|
Schinus terebinthifolius Brazilian pepper tree, Brazilian peppertree
• invasive non-native
Tree, Shrub 
© 2019 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2017 Angelique Herman |
|
Schismus arabicus Arabian schismus, Mediterranean grass
• invasive non-native
Annual grass 
© 2020 Ron Vanderhoff 
© 2017 James Bailey 
© 2022 Katherine Stratton |
|
Schismus barbatus Common mediterranean grass, Old han schismus
• invasive non-native
Annual grass 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
|
Scolymus hispanicus Common goldenthistle, Golden thistle
• invasive non-native
Perennial herb  © 2004 Dr. Amadej Trnkoczy  © 2001 CDFA |
|
Senecio glomeratus Cutleaf burnweed
• invasive non-native
Annual, Perennial herb 
© 2015 Lynn Overtree 
© 2023 R.A. Chasey 
© 2021 Mary Conway |
|
Senecio jacobaea Stinking willie, Tansy ragwort
• invasive non-native
Perennial herb 
© 2022 Michael Weldon 
© 2022 Michael Weldon 
© 2018 Jennifer Mo |
|
Senecio linearifolius Australian fireweed
• invasive non-native
Annual, Perennial herb 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Sesbania punicea Red sesbania, Rattlebox
• invasive non-native
Shrub 
© 2020 Jennifer Mo 
© 2017 Ellen Uhler 
© 2018 Jennifer Mo |
|
Silybum marianum Blessed milkthistle, Milk thistle
• invasive non-native
Annual, Perennial herb 
© 2020 Nancy Hamlett 
© 2019 Marisa Persaud 
© 2018 Angelique Herman |
|
Sinapis arvensis Charlock mustard
• invasive non-native
Annual herb 
© 2020 Randy Huey 
© 2022 Mike Russler 
© 2023 Andy Ford |
|
Sisymbrium irio London rocket
• invasive non-native
Annual herb 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2022 Mike Russler |
|
Solanum aviculare New Zealand nightshade
• invasive non-native
Shrub 
© 2018 Ron Vanderhoff 
© 2017 Nick Graver 
© 2018 Ron Vanderhoff |
|
Solanum carolinense Carolina horse nettle, Carolina horsenettle
• invasive non-native
Perennial herb 
© 2011 Michael O'Brien  © 2017 Wynn Anderson  © 2001 CDFA |
|
Spartina alterniflora Salt water cord grass, Smooth cordgrass
• invasive non-native
Perennial grass 
© 2014 Vertin Alvarez 
© 2014 Vertin Alvarez  © 2009 Zoya Akulova |
|
Spartina anglica Common cordgrass
• invasive non-native
Perennial grass  © 2018 Joe DiTomaso  © 2018 Joe DiTomaso |
|
Spartina densiflora Dense flowered cord grass, Denseflower cordgrass
• invasive non-native
Perennial grass  © 2001 Joe DiTomaso  © 2001 Joe DiTomaso  © 2001 Joe DiTomaso |
|
Spartina patens Salt meadow cord grass, Saltmeadow cordgrass
• invasive non-native
Perennial grass  © 2000 Joe DiTomaso  © 2011 Steve Matson |
|
Spartium junceum Gorse, Spanish broom
• invasive non-native
Shrub 
© 2020 Ron Vanderhoff 
© 2021 Mary Herr 
© 2020 Julie A. Kierstead |
|
Sphaerophysa salsula Alkali swainsonpea, Austrian peaweed
• invasive non-native
Perennial herb  © 2009 Barry Breckling  © 2009 Barry Breckling |
|
Stipa brachychaeta Puna needle grass
• invasive non-native
Perennial grass 
© 2020 Adrian Lustre 
© 2020 Adrian Lustre 
© 2020 Adrian Lustre |
|
Stipa capensis Cape ricegrass
• invasive non-native
Annual grass 
© 2023 Syd Magner 
© 2019 Stephanie Hines 
© 2019 Stephanie Hines |
|
Stipa manicata Andean tussockgrass
• invasive non-native
Perennial grass 
© 2015 Sarah Minnick 
© 2018 Eric Wrubel 
© 2023 Rachel Suding |
|
Stipa miliacea var. miliacea Smilo grass
• invasive non-native
Perennial grass 
© 2022 Donald Burk 
© 2022 Ron Vanderhoff 
© 2022 Donald Burk |
|
Tamarix aphylla Athel tamarisk, Athel tree
• invasive non-native
Tree 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2021 Randy Huey |
|
Tamarix chinensis Chinese tamarisk, Fivestamen tamarisk, Salt cedar
• invasive non-native
Shrub 
© 2024 Larry Hendrickson 
© 2020 Catherine Capone  © 2014 Ron Wolf |
|
Tamarix gallica French tamarisk
• invasive non-native
Tree, Shrub 
© 2020 Leslie Cobb  © 1995 Saint Mary's College of California  © 1995 Saint Mary's College of California |
|
Tamarix parviflora Fourstamen tamarisk, Smallflower tamarisk
• invasive non-native
Tree, Shrub 
© 2015 Steve Matson 
© 2020 Leslie Cobb 
© 2015 Steve Matson |
|
Tamarix ramosissima Saltcedar, Tamarisk
• invasive non-native
Tree, Shrub 
© 2025 richard mcneill 
© 2017 Barbara Boethling 
© 2022 Ron Vanderhoff |
|
Tanacetum vulgare Common tansy
• invasive non-native
Perennial herb 
© 2011 Ramona Robison  © 2005 George W. Hartwell  © 2007 Louis-M. Landry |
|
Tetragonia tetragonioides New zealand spinach
• invasive non-native
Annual herb 
© 2017 James Bailey 
© 2022 David Strauch  © 2009 Neal Kramer |
|
Thinopyrum junceiforme Russian wheatgrass
• invasive non-native
Perennial grass 
© 2019 Mark K. Skinner 
© 2019 Mark K. Skinner 
© 2019 Mark K. Skinner |
|
Torilis arvensis Field hedge parsley, Spreading hedgeparsley, Tall Sock-Destroyer
• invasive non-native
Annual herb 
© 2019 Ron Vanderhoff 
© 2017 Gary McDonald 
© 2018 Lindsey Hack |
|
Triadica sebifera Chinese tallowtree
• invasive non-native
Tree 
© 2013 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2013 Ron Vanderhoff |
|
Tribulus terrestris Puncture vine, Puncturevine
• invasive non-native
Annual herb 
© 2015 Steve Matson 
© 2015 Steve Matson 
© 2020 Ron Vanderhoff |
|
Trifolium hirtum Rose clover
• invasive non-native
Annual herb 
© 2011 Steve Matson 
© 2011 Steve Matson 
© 2011 Steve Matson |
|
Ulex europaeus Common gorse
• invasive non-native
Shrub 
© 2025 Cynthia Powell 
© 2025 Cynthia Powell 
© 2025 Cynthia Powell |
|
Ventenata dubia North africa grass, Ventenata grass
• invasive non-native
Annual grass 
© 2022 Donald Burk  © 2011 Steve Matson 
© 2024 Michael Chasse |
|
Verbascum thapsus Common mullein, Woolly mullein
• invasive non-native
Perennial herb 
© 2021 R.A. Chasey 
© 2020 Kim Cabrera 
© 2016 Cynthia Powell |
|
Verbena bonariensis Purple top vervain, Purpletop vervain
• invasive non-native
Annual, Biennial herb 
© 2014 Judy and Barry Breckling 
© 2003 Gerald Carr 
© 2003 Gerald Carr |
|
Vinca major Greater periwinkle, Bigleaf periwinkle
• invasive non-native
Perennial herb 
© 2020 Julia Markey 
© 2022 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Volutaria tubuliflora Egyptian knapweed
• invasive non-native
Annual herb 
© 2017 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Lynn Sweet |
|
Washingtonia robusta Mexican fan palm
• invasive non-native
Tree 
© 2018 James Bailey 
© 2021 Ron Vanderhoff  © 2015 Zoya Akulova |
|
Watsonia meriana Bulbil bugle lily
• invasive non-native
Perennial herb 
© 2017 Juan de Dios Villarino 
© 2019 Cynthia Powell 
© 2012 John Sayers |
|
Zantedeschia aethiopica Calla lily, Callalily, Common calla
• invasive non-native
Perennial herb 
© 2020 Jennifer Mo 
© 2020 Ron Vanderhoff 
© 2021 MCOSD EDRR |
|
Zostera japonica Dwarf eelgrass
• invasive non-native
Perennial herb 
© 2014 Gerald Carr 
© 2014 Gerald Carr 
© 2014 Gerald Carr |
|
Zygophyllum fabago Syrian beancaper
• invasive non-native
Perennial herb 
© 2013 Daniel Gluesenkamp  © 2001 CDFA  © 2001 CDFA |
