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Indian Knob
Indian Knob Area, Guidetti Ranch San Luis Obispo County, California San Luis Obispo County |
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| David Keil / CNPS-SLO (2019-06-09) | ||||||
| 328 PLANTS |
|
Acmispon americanus var. americanus American bird's foot trefoil, American trefoil, Spanish lotus
native
Annual herb 
© 2015 Steve Matson 
© 2015 Steve Matson 
© 2015 Steve Matson |
|
Acmispon glaber var. glaber Deerweed
native
Perennial herb 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Acmispon junceus var. biolettii Bioletti's rush lotus
native
Perennial herb 
© 2021 Toni Corelli 
© 2024 Robert Steers 
© 2021 Toni Corelli |
|
Acmispon parviflorus Hill lotus
native
Annual herb 
© 2008 Steve Matson 
© 2022 Dana York 
© 2008 Steve Matson |
|
Acmispon strigosus Strigose lotus
native
Annual herb 
© 2024 Mike Russler 
© 2023 Ron Vanderhoff 
© 2016 Steve Matson |
|
Acmispon wrangelianus Wrangel lotus
native
Annual herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Acourtia microcephala Sacapellote
native
Perennial herb 
© 2022 Diane Etchison 
© 2019 Ron Vanderhoff 
© 2021 Aaron Echols |
|
native
Tree, Shrub 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2019 Steve Matson |
|
Adiantum jordanii Adiantum, maiden hair fern
native
Fern 
© 2022 BOB CASE 
© 2019 Ron Vanderhoff 
© 2023 Mike Russler |
|
Agoseris grandiflora var. grandiflora Giant mountain dandelion
native
Perennial herb 
© 2007 Gerald Carr 
© 2007 Gerald Carr 
© 2012 Michael Mitchell |
|
Agrostis exarata Spike bentgrass, Spike redtop
native
Perennial grass 
© 2022 Teal Derrer 
© 2021 David popp 
© 2022 John Rawlings |
|
Agrostis hooveri Hoover's bent grass, Hoover's bentgrass
• rare native
Perennial grass  © 2008 Adonis (Don) Tate  © 2017 Adonis (Don) Tate |
|
Agrostis pallens Leafy bent grass, Diego bent grass, Seashore bentgrass
native
Perennial grass 
© 2021 John Rawlings 
© 2020 Susan McDougall 
© 2021 John Rawlings |
|
Aira caryophyllea Shiver grass, Silver hairgrass, Silvery hairgrass
• invasive non-native
Annual grass 
© 2005 Steve Matson 
© 2005 Steve Matson 
© 2005 Steve Matson |
|
Ambrosia psilostachya Ragweed, Western ragweed
native
Perennial herb 
© 2021 Mary Ann Machi 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
|
Amsinckia intermedia Common fiddleneck
native
Annual herb 
© 2020 Matt Berger 
© 2019 Ron Vanderhoff 
© 2021 David popp |
|
Anaphalis margaritacea Pearly everlasting
native
Perennial herb 
© 2020 Bob Sweatt 
© 2021 Ken Lunders 
© 2014 James Gonsman |
|
Antirrhinum kelloggii Climbing snapdragon, Kellogg's snapdragon, Lax snapdragon
native
Annual herb 
© 2023 Ron Vanderhoff 
© 2019 David Greenberger 
© 2019 Ron Vanderhoff |
|
Antirrhinum nuttallianum ssp. subsessile Nuttall's snapdragon
native
Annual, Perennial herb 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
|
native
Perennial herb 
© 2018 Michael Mitchell 
© Geoff Burleigh 
© 2024 Mary Conway |
|
Apiastrum angustifolium Mock parsley, Wild celery, Wild parsley
native
Annual herb 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Arctostaphylos pilosula La panza manzanita, Santa Margarita manzanita
• rare native
Shrub 
© 2020 David Greenberger 
© 2020 Mike Russler 
© 2020 Mike Russler |
|
Artemisia californica California sagebrush, Coast sagebrush, Coastal sage brush
native
Shrub 
© 2018 James Gonsman 
© 2019 Aaron Echols 
© 2018 Ron Vanderhoff |
|
Artemisia douglasiana California mugwort, Douglas' sagewort
native
Perennial herb 
© 2022 Ron Vanderhoff 
© 2016 Glen Schneider 
© 2021 Mike Russler |
|
Artemisia dracunculus Herbaceous sagewort, Pinon wormwood, Tarragon
native
Perennial herb 
© 2022 Steve Matson 
© 2022 Steve Matson 
© 2022 Steve Matson |
|
Asclepias eriocarpa Indian milkweed, Kotolo milkweed, Woolypod milkweed
native
Perennial herb 
© 2023 Ron Vanderhoff 
© 2014 Dan Cohn 
© 2019 Ron Vanderhoff |
|
Asclepias fascicularis Narrow leaf milkweed
native
Perennial herb 
© 2010 Steve Matson 
© 2010 Steve Matson 
© 2023 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 |
|
Baccharis pilularis Coyote brush, Dwarf chaparral broom
native
Shrub 
© 2022 Ryan O'Dell 
© 2021 Ron Vanderhoff: Staminate and pistillate plants in flower. 
© 2018 Cynthia Powell |
|
Briza maxima Big quaking grass, Big quakinggrass, Rattlesnake grass
• invasive non-native
Annual grass 
© 2017 Gary McDonald 
© 2018 Bill Schmidt 
© 2017 Gary McDonald |
|
Briza minor Little quaking grass, Little quakinggrass, Little rattlesnake grass
non-native
Annual grass 
© 2023 R.A. Chasey 
© 2019 Gary McDonald 
© 2019 Gary McDonald |
|
Bromus carinatus var. carinatus California brome, Mountain brome
native
Perennial grass 
© 2016 Richard Chasey  © 2013 Jean Pawek 
© 2021 Amelia Ryan |
|
Bromus diandrus Bromegrass, Ripgut brome, Ripgut grass
• invasive non-native
Annual grass 
© Alize 
© 2021 Richard Spjut 
© 2024 David popp |
|
Bromus hordeaceus Soft brome, Soft chess
• invasive non-native
Annual grass 
© 2023 Ron Vanderhoff 
© 2018 Gary McDonald 
© 2018 Gary McDonald |
|
Bromus rubens Red brome
• invasive non-native
Annual grass 
© 2015 Chris Jaster 
© 2015 jamie smith 
© 2018 Gary McDonald |
|
Calochortus albus White fairy lantern, White globe lily
native
Perennial herb 
© 2016 Steve Matson 
© 2019 Ron Vanderhoff 
© 2016 Steve Matson |
|
Calochortus obispoensis San luis mariposa lily
• rare native
Perennial herb (bulb) 
© 2023 Morgan Stickrod 
© 2023 Mike Russler 
© 2022 Dee Shea Himes |
|
Calystegia macrostegia ssp. cyclostegia Coast morning glory, Island false bindweed
native
Perennial herb, Vine 
© 2017 Michael Mitchell 
© 2020 James Gonsman 
© 2017 Michael Mitchell |
|
Camissoniopsis micrantha Spencer primrose
native
Annual herb 
© 2024 Mike Russler 
© 2021 Cara Wilcox 
© 2023 Ron Vanderhoff |
|
Capsella bursa-pastoris Shepherd's purse
non-native
Annual herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2008 Steve Matson |
|
Cardamine californica California toothwort, milkmaids
native
Perennial herb 
© 2020 Barbara Peck 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Carduus pycnocephalus Italian thistle
• invasive non-native
Annual herb 
© 2019 Gary McDonald 
© 2023 Diana Wahl 
© 2023 Ron Vanderhoff |
|
Carex barbarae Santa barbara sedge, Valley sedge
native
Perennial grasslike herb 
© 2024 R.A. Chasey 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Carex globosa Round fruit sedge
native
Perennial grasslike herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Carex praegracilis Clustered field sedge, Field sedge
native
Perennial grasslike herb 
© 2020 Steve Matson 
© 2020 Steve Matson 
© 2020 Steve Matson |
|
Carex subbracteata Small bract sedge
native
Perennial grasslike herb 
© 2023 Dana York 
© 2021 John Rawlings 
© 2023 Ellen Uhler |
|
Castilleja affinis ssp. affinis Coast indian paintbrush
native
Perennial herb 
© 2006 Steve Matson 
© 2006 Steve Matson 
© 2019 Ron Vanderhoff |
|
Castilleja attenuata Narrow leaved owl's clover, Valley tassels
native
Annual herb 
© 2024 Steve Conger 
© 2024 Mary Ann Machi 
© 2019 Timothy Boomer |
|
Castilleja densiflora ssp. densiflora Dense flower owl's clover, Denseflower indian paintbrush
native
Annual herb 
© 2018 Hayley Ross 
© 2019 Verna Jigour 
© 2015 James Gonsman |
|
Castilleja densiflora ssp. obispoensis Obispo indian paintbrush, San luis obispo owl's clover
native
Annual herb 
© 2024 Kyle Suchy 
© 2023 Kyle Suchy 
© 2024 Kyle Suchy |
|
Castilleja exserta ssp. exserta Exserted indian paintbrush, Pale purple owlclover, Purple owl's clover
native
Annual herb 
© 2020 David Greenberger 
© 2019 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Ceanothus cuneatus var. fascicularis Sand buck brush, Sedgeleaf buckbrush
• rare native
Shrub 
© 2024 Mike Russler 
© 2022 Cynthia Powell 
© 2019 Bryant Baker |
|
Ceanothus impressus var. nipomensis Nipomo mesa ceanothus, Santa barbara ceanothus
native
Shrub 
© 2025 Kyle Suchy 
© 2025 Kyle Suchy 
© 2025 Kyle Suchy |
|
Ceanothus spinosus Greenbark ceanothus, Redheart
native
Tree, Shrub 
© 2018 Ron Vanderhoff 
© 2012 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Centaurea melitensis Maltese star thistle, Napa star thistle, Tocalote
• invasive non-native
Annual herb 
© 2019 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Laura Anna Arellano |
|
Cerastium glomeratum Large mouse ears, Mouseear chickweed, Sticky chickweed
non-native
Annual herb 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2023 R.A. Chasey |
|
Cercocarpus betuloides var. betuloides Birch leaf mountain mahogany
native
Tree, Shrub 
© 2021 Steve Matson 
© 2021 Steve Matson 
© 2016 Ron Vanderhoff |
|
Chondrilla juncea Hogbite, Skeleton weed
• invasive non-native
Perennial herb 
© 2021 George Williams 
© 2024 Mike Russler 
© 2021 Bob Sweatt |
|
Chorizanthe diffusa Diffuse spineflower
native
Annual herb 
© 2022 Irene Rosen 
© 2020 David Greenberger 
© 2024 Mike Russler |
|
Chorizanthe obovata Spoon sepal spineflower, Spoonsepal spineflower
native
Annual herb 
© 2017 George Butterworth 
© 2023 Chloe and Trevor Van Loon 
© 2025 Mike Russler |
|
Cirsium occidentale var. occidentale Cobweb thistle, Cobwebby thistle
native
Perennial herb 
© 2022 Suzanne L. Weakley 
© 2020 Coty Sifuentes-Winter 
© 2019 Randy Huey |
|
Cirsium vulgare Bull thistle
• invasive non-native
Perennial herb 
© 2017 James Bailey 
© 2020 Bob Sweatt 
© 2020 Bob Sweatt |
|
Clarkia affinis Chaparral clarkia, Chaparral fairyfan
native
Annual herb 
© 2025 Ken-ichi Ueda 
© 2024 Sue Luft 
© 2020 Steve Laymon |
|
Clarkia purpurea ssp. quadrivulnera Four-spot, Purple clarkia, Purple godetia
native
Annual herb 
© 2014 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Clarkia speciosa ssp. immaculata Pismo clarkia
• rare native
Annual herb 
© 2020 Steve Laymon 
© 2020 Steve Laymon 
© 2020 Steve Laymon |
|
Clarkia unguiculata Elegant clarkia, Mountain garland, Woodland clarkia
native
Annual herb 
© 2024 Bob Stahmer 
© 2025 Mary Conway 
© 2021 Mike Russler |
|
Claytonia perfoliata ssp. perfoliata Claytonia, Miner's lettuce
native
Annual herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2008 Steve Matson |
|
Clematis ligusticifolia Creek clematis, Western white clematis, Yerba de chiva
native
Perennial herb, Vine 
© 2018 Diane Etchison 
© 2012 Steve Matson 
© 2012 Steve Matson |
|
Clinopodium douglasii Yerba buena
native
Perennial herb 
© 2019 Gary McDonald 
© 2012 Gary McDonald 
© 2012 Gary McDonald |
|
Collinsia heterophylla Purple chinese houses
native
Annual herb 
© 2022 Mary Ann Machi 
© 2019 David Greenberger 
© 2019 Ron Vanderhoff |
|
Conium maculatum Poison hemlock
• invasive non-native
Perennial herb 
© 2024 Cynthia Powell 
© 2013 Toni Corelli 
© 2016 Cynthia Powell |
|
Cordylanthus rigidus ssp. rigidus Rigid bird's beak, Stiffbranch bird's beak
native
Annual herb (hemiparasitic) 
© 2021 Mike Russler 
© 2021 Mike Russler 
© 2021 Mike Russler |
|
Corethrogyne filaginifolia Common sandaster
native
Perennial herb 
© 2022 Mike Russler 
© 2018 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Cornus sericea ssp. occidentalis Western dogwood
native
Shrub 
© 2019 David Greenberger 
© 2018 Lynn Overtree 
© 2020 Susan McDougall |
|
Cotula coronopifolia Brass buttons, Common brassbuttons
• invasive non-native
Perennial herb 
© 2022 Steve Matson 
© 2022 Steve Matson 
© 2018 Adam Chasey |
|
Crassula connata Pigmy weed, Sand pygmy weed, Sand pygmyweed
native
Annual herb 
© 2019 Ron Vanderhoff 
© 2022 Sameer Saroa 
© 2019 Adam Chasey |
|
Crassula tillaea Mediterranean pygmy weed, Moss pygmyweed
non-native
Annual herb 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Crocanthemum scoparium peak rush-rose, broom rush-rose
native
Shrub 
© 2020 Stacie Wolny 
© 2020 Stacie Wolny 
© 2020 Stacie Wolny |
|
Croton californicus California croton, Desert croton
native
Perennial herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2017 Steve Matson |
|
Croton setiger Turkey-mullein
native
Annual herb 
© 2011 Steve Matson 
© 2011 Steve Matson 
© 2014 Richard Chasey |
|
Cryptantha clevelandii var. florosa Coastal cryptantha
native
Annual herb 
© 2020 David Greenberger 
© 2024 Ron Vanderhoff 
© 2023 Ken-ichi Ueda |
|
Cryptantha microstachys Popcorn flower, Tejon cryptantha
native
Annual herb 
© 2019 Diane Etchison 
© 2018 Ron Vanderhoff 
© 2017 Diane Etchison |
|
Cuscuta californica var. californica California dodder, Chaparral dodder, Short flowered dodder
native
Annual herb, Vine (parasitic) 
© 2021 R.A. Chasey 
© 2021 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Cynodon dactylon Bermuda grass, Bermudagrass
• invasive non-native
Perennial grass 
© 2021 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Cyperus eragrostis Tall cyperus, Tall flatsedge
native
Perennial grasslike herb 
© 2016 Joan Hampton 
© 2024 Ron Vanderhoff 
© 2024 Ron Vanderhoff |
|
Cyperus niger Black cyperus, Black flatsedge, Brown cyperus
native
Perennial grasslike herb 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Dactylis glomerata Orchard grass, Orchardgrass
• invasive non-native
Perennial grass 
© 2003 Steve Matson 
© 2003 Steve Matson 
© 2003 Steve Matson |
|
Datura stramonium Jimson weed, Jimsonweed
non-native
Annual herb 
© 2011 Steve Matson 
© 2011 Steve Matson 
© 2020 Ron Vanderhoff |
|
Daucus pusillus American wild carrot, Rattlesnake weed
native
Annual herb 
© 2019 Diane Etchison 
© 2022 David Wolfson 
© 2019 John Rawlings |
|
Deinandra increscens ssp. increscens Grassland tarweed
native
Annual herb 
© 2024 Kyle Suchy  © 2011 George Williams  © 2003 Lynn Watson |
|
Delairea odorata Cape ivy
• invasive non-native
Perennial herb 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Delphinium parryi ssp. blochmaniae Blochman's larkspur, Dune larkspur
• rare native
Perennial herb 
© Geoff Burleigh 
© Geoff Burleigh 
© Geoff Burleigh |
|
Dendromecon rigida Bush poppy, Tree poppy
native
Shrub 
© 2024 Mike Russler 
© 2024 Mike Russler 
© 2020 Ron Vanderhoff |
|
Diplacus aurantiacus var. aurantiacus Orange Bush Monkeyflower
native
Shrub 
© 2024 Steve Conger 
© 2024 Steve Conger 
© 2019 Mary Gerbic |
|
Dipterostemon capitatus ssp. capitatus Blue dicks
native
Perennial herb 
© 2008 Steve Matson 
© 2023 Mike Russler 
© 2016 Steve Matson |
|
Distichlis spicata Inland saltgrass, Salt grass, Saltgrass
native
Perennial grass 
© 2020 Matt Berger 
© 2019 Ron Vanderhoff 
© 2018 Emily Allen |
|
Dryopteris arguta California wood fern, Coastal wood fern, Shield fern
native
Fern 
© 2023 Julia Markey 
© 2019 Rebecca Crowe 
© 2018 James Gonsman |
|
Dudleya caespitosa Coast dudleya, Sand lettuce
native
Perennial herb 
© 2022 Mary Conway 
© 2022 Mary Conway 
© 2022 Cynthia Powell |
|
Dudleya lanceolata Lanceleaf liveforever, Southern california dudleya
native
Perennial herb 
© 2019 Ron Vanderhoff 
© 2020 Steven M Norris 
© 2020 Steven M Norris |
|
Dudleya pulverulenta Chalk dudleya
native
Perennial herb 
© 2018 Ron Vanderhoff 
© 2020 Julia Markey 
© 2019 Diane Etchison |
|
Echinochloa crus-galli Barnyard grass, Japanese millet, Watergrass
non-native
Annual grass 
© 2024 R.A. Chasey 
© 2022 R.A. Chasey 
© 2024 R.A. Chasey |
|
Ehrharta calycina Perennial veldt grass, Perennial veldtgrass
• invasive non-native
Perennial grass 
© 2020 David Greenberger 
© 2019 Ron Vanderhoff 
© 2018 Ron Vanderhoff |
|
Elymus condensatus Giant wild rye
native
Perennial grass 
© 2020 Ron Vanderhoff 
© 2024 Mel Letterman 
© 2020 Diane Etchison |
|
Elymus glaucus ssp. glaucus Blue wild rye, Blue wildrye, Western rye grass
native
Perennial grass 
© 2023 R.A. Chasey 
© 2021 Arlee Montalvo 
© 2022 Ron Vanderhoff |
|
Elymus triticoides Beardless wild rye
native
Perennial grass 
© 2024 Erin Bergman 
© 2021 Ron Vanderhoff 
© 2018 Rachelle Gray |
|
Epilobium brachycarpum Annual fireweed, Autumn willowweed, Panicled willow herb
native
Annual herb 
© 2023 Mary Ann Machi 
© 2019 Ramona Robison 
© 2020 Ron Vanderhoff |
|
Epilobium canum ssp. canum California fuchsia, Hummingbird trumpet
native
Perennial herb 
© 2023 Ron Vanderhoff 
© 2024 R.A. Chasey 
© 2022 Ron Vanderhoff |
|
Equisetum laevigatum Horsetail, Smooth horsetail, Smooth scouring rush
native
Fern 
© 2020 Ron Vanderhoff 
© 2021 Richard Spjut 
© 2020 Ron Vanderhoff |
|
Equisetum telmateia ssp. braunii Giant horse tail, Giant horsetail
native
Fern 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2022 Suzanne L. Weakley |
|
Ericameria ericoides California goldenbush, Mock heather
native
Shrub 
© 2021 Mike Russler 
© 2021 Suzanne L. Weakley 
© 2021 Mike Russler |
|
Erigeron bonariensis Flax-leaved horseweed
non-native
Annual herb 
© 2021 Donald Burk 
© 2017 Gary McDonald 
© 2023 Ron Vanderhoff |
|
Erigeron canadensis Canada horseweed
native
Annual herb 
© 2017 Gary McDonald 
© 2017 Gary McDonald 
© 2022 Mike Russler |
|
Erigeron philadelphicus Philadelphia fleabane
native
Perennial herb  © andreenannemarie 
© 2022 Dana York  © Bryce Strobel |
|
Eriodictyon altissimum Indian knob mountainbalm
• rare native
Shrub 
© 2024 Mike Russler 
© 2024 Mike Russler 
© 2015 David Wolfson |
|
Eriogonum fasciculatum var. fasciculatum California buckwheat, Eastern mojave buckwheat
native
Shrub 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2024 Erin Bergman |
|
Eriogonum parvifolium Dune eriogonum, Sea cliff buckwheat, Seacliff buckwheat
native
Shrub 
© 2022 Mary Conway 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Eriophyllum confertiflorum var. confertiflorum Golden yarrow, Yellow yarrow
native
Shrub 
© 2023 Ryan O'Dell 
© 2013 James Gonsman 
© 2020 Ron Vanderhoff |
|
Eriophyllum multicaule Branched woolly sunflower, Many stemmed eriophyllum, Manystem woolly sunflower
native
Annual herb 
© 2020 David Wolfson 
© 2020 David Greenberger 
© 2023 Matt Berger |
|
Erodium botrys Big heron bill, Broad leaf filaree, Long beaked filaree
non-native
Annual herb 
© 2006 Steve Matson 
© 2006 Steve Matson 
© 2006 Steve Matson |
|
Erodium brachycarpum Foothill filaree, Short fruited filaree, Shortfruit stork's bill
• invasive non-native
Annual herb 
© 2016 Bob van Duinen 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
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 |
|
Erodium moschatum Musky stork's bill, White stemmed filaree, Whitestem filaree
• invasive non-native
Annual herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Erysimum capitatum var. capitatum Sanddune wallflower
native
Perennial herb 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
|
Erythranthe floribunda Many flowered monkeyflower
native
Annual herb 
© 2025 Mike Russler 
© 2024 Ron Vanderhoff 
© 2024 Ron Vanderhoff |
|
Eschscholzia californica California poppy
native
Annual, Perennial herb 
© 2019 Dee Shea Himes 
© 2021 Ron Vanderhoff 
© 2019 Amy Rapport |
|
Eucrypta chrysanthemifolia var. chrysanthemifolia Common eucrypta, Spotted hideseed
native
Annual herb 
© 2024 Mike Russler 
© 2023 Ron Vanderhoff 
© 2024 Mike Russler |
|
Euphorbia maculata Spotted spurge
non-native
Annual herb 
© 2019 B.J. Dion 
© 2019 B.J. Dion 
© 2022 Ron Vanderhoff |
|
Festuca arundinacea Alta fescue, Reed fescue, Tall fescue
• invasive non-native
Perennial grass 
© 2022 Cynthia Powell 
© 2020 Robert Steers 
© 2017 MCOSD EDRR |
|
Festuca bromoides Brome fescue
non-native
Annual grass 
© 2022 Diana Wahl 
© 2021 Toni Corelli 
© 2021 David popp |
|
Festuca myuros Rattail sixweeks grass
• invasive non-native
Annual grass 
© 2021 Aaron Echols 
© 2021 Ron Vanderhoff 
© 2022 John Rawlings |
|
Festuca octoflora Sixweeks grass
native
Annual grass 
© 2023 R.A. Chasey 
© 2020 Sara Timby 
© 2018 Ken Hickman |
|
Festuca perennis Italian rye grass
• invasive non-native
Annual, Perennial grass 
© 2019 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Foeniculum vulgare Biscuit root, Sweet fennel
• invasive non-native
Perennial herb 
© 2019 Ron Vanderhoff 
© 2023 Fred Roberts 
© 2022 Ryan O'Dell |
|
Frangula californica ssp. californica California coffeeberry
native
Shrub 
© 2015 Steve Matson 
© 2015 Steve Matson 
© 2019 Ron Vanderhoff |
|
Galium aparine Cleavers, Common bedstraw, Goose grass
native
Annual herb 
© 2020 Ron Vanderhoff 
© 2023 Julia Markey 
© 2020 Ron Vanderhoff |
|
Galium porrigens var. porrigens Climbing bedstraw, Graceful bedstraw, Oval leaved bedstraw
native
Vine, Shrub 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2022 Julia Larke |
|
Galium trifidum ssp. columbianum Threepetal bedstraw
native
Perennial herb 
© 2005 Steve Matson 
© 2005 Steve Matson 
© 2005 Steve Matson |
|
Gamochaeta ustulata Featherweed
native
Perennial herb 
© 2019 Gary McDonald 
© 2019 Gary McDonald 
© 2019 Gary McDonald |
|
Gastridium phleoides Nit grass
non-native
Annual grass 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2017 Gary McDonald |
|
Geranium dissectum Cranesbill, Cut leaved geranium, Cutleaf geranium
• invasive non-native
Annual herb 
© 2021 Al Keuter 
© 2024 Mike Russler 
© 2014 Bryan Derr |
|
Geranium molle Crane's bill geranium, Dove's foot geranium, Dovefoot geranium
• invasive non-native
Annual, Perennial herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2008 Steve Matson |
|
Hazardia squarrosa var. squarrosa Saw toothed goldenbush, Sawtooth goldenbush
native
Shrub 
© 2024 Mike Russler 
© 2024 Mike Russler 
© 2021 Mary Conway |
|
Helenium puberulum Rosilla, Sneezeweed
native
Perennial herb 
© 2021 Mike Russler 
© 2019 Patrick Furtado 
© 2019 Stacie Wolny |
|
Heliotropium curassavicum var. oculatum Alkali heliotrope, Seaside heliotrope
native
Perennial herb 
© 2019 Ron Vanderhoff 
© 2018 Ron Vanderhoff 
© 2021 Suzanne L. Weakley |
|
Helminthotheca echioides Bristly ox-tongue
• invasive non-native
Annual, Perennial herb 
© 2016 Hayley Ross 
© 2019 Rachelle Gray 
© 2012 Elizabeth Brusati |
|
Hemizonia congesta ssp. luzulifolia Hayfield tarweed, Woodrush tarweed
native
Annual herb 
© 2025 Alaine Arslan 
© 2023 Alaine Arslan 
© 2022 R.A. Chasey |
|
Hesperocnide tenella Western nettle, Western stinging nettle, Western stingingnettle
native
Annual herb 
© 2023 Ken-ichi Ueda 
© 2006 Steve Matson 
© 2020 Ken Hickman |
|
Hesperomecon linearis Narrowleaf queen poppy
native
Annual herb  © 2023 aparrot1 
© 2021 Mary Conway 
© 2023 Mike Russler |
|
Heteromeles arbutifolia Christmas berry, Toyon
native
Shrub 
© 2015 James Gonsman 
© 2017 Gary McDonald 
© 2022 John Doyen |
|
Heterotheca grandiflora Telegraph weed, Telegraphweed
native
Annual, Perennial herb 
© 2021 Mike Russler 
© 2021 Mike Russler 
© 2023 Cat Chang |
|
Hirschfeldia incana Mediterranean hoary mustard, Short podded mustard, Summer mustard
• invasive non-native
Perennial herb 
© 2017 Gary McDonald 
© 2017 Gary McDonald 
© 2022 Ron Vanderhoff |
|
Hordeum brachyantherum ssp. californicum California barley, California meadow barley
native
Perennial grass 
© 2021 Cynthia Powell 
© 2021 John Rawlings 
© 2021 John Rawlings |
|
Hordeum marinum subsp gussoneanum Small Tree-Mallow
|
|
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 cuneata var. cuneata Wedge leaved horkelia
native
Perennial herb 
© 2020 David Greenberger 
© 2019 David Greenberger 
© 2022 R.A. Chasey |
|
Horkelia cuneata var. puberula Mesa horkelia
• rare native
Perennial herb 
© 2023 Ron Vanderhoff 
© 2024 Mike Russler 
© 2023 Ron Vanderhoff |
|
Hydrocotyle verticillata Whorled marsh pennywort, Whorled marshpennywort
native
Perennial herb 
© 2013 Ron Vanderhoff 
© 2020 Robert Byrnes 
© 2019 David Greenberger |
|
Hypericum anagalloides Creeping st. john's wort, Tinker's penny
native
Annual, Perennial herb 
© 2017 David Greenberger 
© 2020 Joaquin Hale 
© 2019 Bob Sweatt |
|
Hypochaeris glabra Smooth cat's ear
• invasive non-native
Annual herb 
© 2020 Ron Vanderhoff 
© 2017 Gary McDonald 
© 2019 Ron Vanderhoff |
|
Isolepis cernua Low bulrush
native
Annual grasslike herb 
© 2021 R.A. Chasey 
© 2023 R.A. Chasey 
© 2018 Ron Vanderhoff |
|
Juncus bufonius var. bufonius Toad rush
native
Annual grasslike herb 
© 2021 John Rawlings 
© 2023 R.A. Chasey 
© 2019 Ron Vanderhoff |
|
Juncus occidentalis Rush, Slender juncus, Western rush
native
Perennial grasslike herb 
© 2021 Toni Corelli 
© 2021 Dick Rawson 
© 2021 Dick Rawson |
|
Juncus patens Common rush, Spreading rush
native
Perennial grasslike herb 
© 2022 R.A. Chasey 
© 2022 R.A. Chasey 
© 2018 Emily Allen |
|
Keckiella cordifolia Climbing penstemon, Heart leaved keckiella, Heartleaf keckiella
native
Shrub 
© 2020 Ron Vanderhoff 
© 2022 Bryant Baker 
© 2022 Bryant Baker |
|
Koeleria gerardii Annual june grass, bristly koeleria
non-native
Annual grass 
© 2023 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
|
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 
© 2022 Chris McDonald |
|
Lagophylla ramosissima Branched lagophylla, Common hareleaf
native
Annual herb 
© 2024 Mike Russler 
© 2021 Dee Shea Himes 
© 2022 Mike Russler |
|
Lamarckia aurea Goldentop grass
non-native
Annual grass 
© 2017 B.J. Dion 
© 2019 Ron Vanderhoff 
© 2015 James Gonsman |
|
Lamium amplexicaule Giraffe head, Henbit deadnettle
non-native
Annual herb 
© 2005 Steve Matson 
© 2005 Steve Matson 
© 2024 Alaine Arslan |
|
Lathyrus vestitus var. vestitus Common pacific pea, Hillside pea, Wild sweetpea
native
Perennial herb 
© 2019 Ron Vanderhoff 
© 2015 Chris Jaster 
© 2024 Ron Vanderhoff |
|
Lemna gibba Duckweed, Gibbous duckweed, Swollen duckweed
native
Perennial herb 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Lepidium nitidum Peppergrass, Shining pepper grass, Shining pepperweed
native
Annual herb 
© 2021 Steve Matson 
© 2016 Steve Matson  © 2025 Jason Flores |
|
Lepidium strictum Peppergrass, Prostrate pepper grass, Upright pepperweed
native
Annual herb 
© 2022 Ron Vanderhoff 
© 2022 Jim Xerogeanes 
© 2022 Ron Vanderhoff |
|
Leptosiphon parviflorus Variable linanthus
native
Annual herb 
© 2008 Keir Morse 
© 2008 Keir Morse 
© 2008 Keir Morse |
|
Lessingia pectinata var. pectinata Valley lessingia
native
Annual herb 
© 2024 Mike Russler 
© 2024 Mike Russler 
© 2022 R.A. Chasey |
|
native
Shrub 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Lithophragma affine Common woodland star, San Francisco woodland star
native
Perennial herb 
© 2018 Steve Matson 
© 2018 Steve Matson 
© 2018 Steve Matson |
|
Logfia filaginoides California cottonrose
native
Annual herb 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2019 Steve Matson |
|
Logfia gallica Narrowleaf cottonrose
non-native
Annual herb 
© 2023 R.A. Chasey 
© 2024 Mike Russler 
© 2017 Barbara Boethling |
|
Lonicera hispidula Pink honeysuckle
native
Vine, Shrub 
© 2022 Suzanne L. Weakley 
© 2021 Cara Wilcox 
© 2018 Diana Wahl |
|
Lotus corniculatus Bird's foot trefoil, Birdfoot deervetch, Broadleaf birdsfoot trefoil
• invasive non-native
Perennial herb 
© 2005 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Lupinus arboreus Coastal bush lupine, Yellow bush lupine
native
Shrub 
© 2020 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Lupinus bicolor Annual lupine, Bicolored lupine, Miniature lupine
native
Annual, Perennial herb 
© 2018 Stacie Wolny 
© 2022 Mike Russler 
© 2019 Gary McDonald |
|
Lupinus hirsutissimus Stinging annual lupine, Stinging lupine
native
Annual herb 
© 2024 Mike Russler 
© 2023 Neil Uelman 
© 2019 Ron Vanderhoff |
|
Lupinus latifolius var. latifolius Broad leaf lupine
native
Perennial herb 
© 2021 Steve Matson 
© 2024 Mike Russler 
© 2017 Steve Matson |
|
Lupinus ludovicianus San luis lupine, San luis obispo county lupine
• rare native
Perennial herb 
© 2023 Chloe and Trevor Van Loon 
© 2025 Mike Russler 
© 2023 Chloe and Trevor Van Loon |
|
Lupinus nanus Sky lupine
native
Annual herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Lupinus truncatus Blunt leaved lupine, Collared annual lupine, Truncate leaf lupine
native
Annual herb 
© 2023 Caitlin Kreutz 
© 2023 Connor O'Hara-Baker 
© 2010 Michael Mitchell |
|
Luzula subsessilis Pacific woodrush
native
Perennial grasslike herb 
© 2024 John Rawlings 
© 2021 David popp 
© 2021 David popp |
|
Lysimachia arvensis Scarlet pimpernel
non-native
Annual herb 
© 2017 B.J. Dion 
© 2018 Stacie Wolny 
© 2017 B.J. Dion |
|
Lythrum hyssopifolia Hyssop loosestrife
• invasive non-native
Annual, Perennial herb 
© 2019 Diane Etchison 
© 2024 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Madia gracilis Grassy tarweed, Gumweed madia, Slender tarweed
native
Annual herb 
© 2024 Mike Russler 
© 2021 Amber Bedgood 
© 2019 Ron Vanderhoff |
|
Madia sativa Chile tarweed, Coast tarweed, Coastal tarweed
native
Annual herb 
© 2013 Ron Vanderhoff 
© 2023 Margot Cunningham 
© 2021 Zoya Akulova-Barlow |
|
Malva nicaeensis Bull mallow
non-native
Annual herb 
© 2023 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Malva parviflora Cheeseweed mallow
non-native
Annual herb 
© 2022 Mike Russler 
© 2022 Donald Burk 
© 2022 Mike Russler |
|
Marah fabacea California man-root
native
Perennial herb, Vine 
© 2018 Gary McDonald 
© 2018 MCOSD EDRR 
© 2021 Cyril Guyot |
|
Marrubium vulgare White horehound
• invasive non-native
Perennial herb 
© ©2013 Gary McDonald 
© 2015 Diane Etchison 
© 2018 Nancy Hamlett |
|
Matricaria discoidea Pineapple weed
native
Annual herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2018 Stacie Wolny |
|
Medicago lupulina Black medick
non-native
Annual, Perennial herb 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Medicago polymorpha Bur clover, Bur medic, California burclover
• invasive non-native
Annual herb 
© 2019 Gary McDonald 
© 2019 Gary McDonald 
© 2019 Gary McDonald |
|
Medicago praecox Mediterranean medick
non-native
Annual herb  © 2012 Jean Pawek 
© 2022 David popp  © 2012 Jean Pawek |
|
Melica imperfecta California melic, Coast range melic, Small flowered melica
native
Perennial grass 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Melilotus albus White sweetclover
• invasive non-native
Annual, Biennial herb 
© 2021 Ron Vanderhoff 
© 2020 Bob Sweatt 
© 2022 Ron Vanderhoff |
|
Melilotus indicus Annual yellow sweetclover, Sourclover
non-native
Annual herb 
© 2019 Randy Huey 
© 2019 Randy Huey 
© 2017 Rosalie Benitez |
|
Micropus californicus var. californicus Q tips, Slender cottonweed
native
Annual herb 
© 2006 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
• rare native
Annual herb 
© 2016 John Moule 
© 2020 Melissa Mooney 
© 2017 Keir Morse |
|
Muhlenbergia microsperma Annual muhly, Littleseed muhly
native
Annual grass 
© 2017 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Muhlenbergia rigens Deergrass
native
Perennial grass 
© 2004 Steve Matson 
© 2018 Cynthia Powell 
© 2022 Ron Vanderhoff |
|
Muilla maritima Common muilla, Sea muilla
native
Perennial herb 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
|
Nasturtium officinale Watercress
native
Perennial herb (aquatic) 
© 2012 Steve Matson 
© 2012 Steve Matson 
© 2012 Steve Matson |
|
Navarretia atractyloides Holly leaf navarretia, Hollyleaf pincushionplant
native
Annual herb 
© 2025 Mike Russler 
© 2023 Donald Burk 
© 2025 Mike Russler |
|
Navarretia hamata ssp. parviloba Hooked navarretia, Small lobe navarretia
native
Annual herb 
© 2023 R.A. Chasey 
© 2022 R.A. Chasey 
© 2021 Cara Wilcox |
|
Nemophila menziesii Baby blue eyes
native
Annual herb 
© 2019 Matt Berger 
© 2019 Diane Etchison 
© 2019 Ron Vanderhoff |
|
Nuttallanthus texanus Blue toadflax
native
Annual, Perennial herb 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
|
Opuntia ficus-indica Mission cactus, Tuna cactus
non-native
Shrub (stem succulent) 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Oxalis pilosa Hairy wood sorrel
native
Annual herb 
© 2022 R.A. Chasey 
© 2022 Cynthia Powell 
© 2022 Ken-ichi Ueda |
|
Paeonia californica California peony
native
Perennial herb 
© 2024 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2019 Susan McDougall |
|
Pedicularis densiflora Warrior's plume, Indian warrior
native
Perennial herb 
© 2015 Dee Warenycia 
© 2019 Jason Mills 
© 2024 Mary Ann Machi |
|
Pellaea andromedifolia Coffee cliffbrake, Coffee fern
native
Fern 
© 2023 Steve Conger 
© 2021 Steve Matson 
© 2021 Mike Russler |
|
Pentagramma triangularis ssp. triangularis Gold back fern
native
Fern 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2019 Gary McDonald |
|
Persicaria punctata Dotted smartweed
native
Perennial herb 
© 2018 Ron Vanderhoff 
© 2018 Ron Vanderhoff 
© 2022 Helen Hancock |
|
Phacelia distans Common phacelia, Distant phacelia, Wild heliotrope
native
Annual herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2022 Ron Vanderhoff |
|
Phacelia imbricata ssp. imbricata Imbricate Phacelia
native
Annual herb 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2019 Steve Matson |
|
Phacelia tanacetifolia Lacy phacelia, Tansy leafed phacelia
native
Annual herb 
© 2022 Mike Russler 
© 2024 Bob Steele 
© 2022 Charles Russell |
|
Phacelia viscida var. viscida Sticky phacelia
native
Annual herb 
© 2024 Mike Russler 
© 2024 Mike Russler 
© 2024 Mike Russler |
|
Phalaris aquatica Bulbous canarygrass, Harding grass
• invasive non-native
Perennial grass 
© 2024 Michael Chasse 
© 2021 Lenihan Mazur 
© 2024 John Rawlings |
|
Pholistoma auritum var. auritum Blue fiesta flower, Blue fiestaflower, Fiesta flower
native
Annual herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Phoradendron villosum ssp. villosum Mistletoe
native
Shrub (parasitic) 
© 2022 David popp 
© 2020 R.A. Chasey 
© 2021 R.A. Chasey |
|
Pickeringia montana var. montana Montana chaparral pea
native
Shrub 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
|
Pinus muricata Bishop pine, Bull pine, Prickle cone pine
native
Tree 
© 2012 Michael Mitchell 
© 2012 Michael Mitchell 
© 2023 Karen Swift |
|
Plagiobothrys canescens Grey popcorn flower, Valley popcorn flower, Valley popcornflower
native
Annual herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Plantago erecta California plantain, Dotseed plantain, Foothill plantain
native
Annual herb 
© 2008 Steve Matson 
© 2022 Steve Matson 
© 2022 Steve Matson |
|
Plantago lanceolata English plantain, Narrow leaved plantain, Ribgrass
• invasive non-native
Perennial herb 
© 2008 Steve Matson 
© 2019 Joe Engelbrecht 
© 2021 Ken Lunders |
|
Plantago major Common plantain
non-native
Perennial herb 
© 2019 Bob Sweatt 
© 2022 Diana Wahl 
© 2020 Ryan Carle |
|
Plantago subnuda Mexican plantain, Naked plantain, Tall coastal plantain
native
Perennial herb 
© 2019 Patrick Furtado 
© 2022 Dianne Lake 
© 2009 Toni Corelli |
|
Platanus racemosa California sycamore, Western sycamore
native
Tree 
© 2022 Ron Vanderhoff 
© 2018 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Platystemon californicus Cream cups, Creamcups
native
Annual herb 
© 2017 Nathanial Wigington 
© 2022 John L. Thompson 
© 2022 John L. Thompson |
|
Polycarpon depressum California allseed, California manyseed, California polycarpon
native
Annual herb 
© 2023 James Bailey 
© 2023 James Bailey 
© 2022 Ken Hickman |
|
Polygonum aviculare Prostrate knotweed
non-native
Annual, Perennial herb 
© 2023 Ron Vanderhoff 
© 2023 Cynthia Powell 
© 2021 Ron Vanderhoff |
|
Polypodium californicum California polypody
native
Fern 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2023 Keir Morse |
|
Polypodium calirhiza Acrid fern, Licorice fern, Nested polypody
native
Fern 
© 2022 BOB CASE 
© 2015 James Gonsman 
© 2020 Susan McDougall |
|
Polypogon monspeliensis Annual beard grass, Rabbitsfoot grass
• invasive non-native
Annual grass 
© 2008 Steve Matson 
© 2014 Steve Matson 
© 2008 Steve Matson |
|
Populus trichocarpa Black cottonwood
native
Tree 
© 2019 Ron Vanderhoff 
© 2012 Steve Matson 
© 2021 Ron Vanderhoff |
|
Primula clevelandi Small Tree-Mallow
|
|
Prunus ilicifolia var. ilicifolia Holly leaf cherry, Hollyleaf cherry
native
Tree, Shrub 
© 2023 Helen Hancock 
© 2024 Mike Russler 
© 2022 Ron Vanderhoff |
|
Pseudognaphalium biolettii Two-color rabbit-tobacco
native
Perennial herb 
© 2019 David Greenberger 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Pseudognaphalium californicum Ladies' tobacco
native
Annual, Perennial herb 
© 2019 Gary McDonald 
© 2020 Steven M Norris 
© 2021 Ron Vanderhoff |
|
Pseudognaphalium luteoalbum Jersey cudweed
non-native
Annual herb 
© 2021 Ron Vanderhoff 
© 2019 Diane Etchison 
© 2015 Chris Jaster |
|
Pteridium aquilinum var. pubescens Hairy brackenfern, Western bracken fern
native
Fern 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2022 Bob Sweatt |
|
Quercus agrifolia var. agrifolia California live oak, Coast live oak
native
Tree 
© 2023 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2021 Al Keuter |
|
Ranunculus californicus California buttercup
native
Perennial herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Rhamnus crocea Redberry buckthorn
native
Shrub 
© 2011 Michael Mitchell 
© 2022 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Ribes speciosum Fuchsia flowered gooseberry, Fuchsiaflower gooseberry
native
Shrub 
© 2022 David Chipping 
© 2024 Shelly Marshall 
© 2021 Ron Vanderhoff |
|
Rosa spithamea Ground rose, Sonoma rose
native
Shrub 
© 2021 David Gowen  © Silverado Jim 
© 2020 David Krause |
|
Rubus ursinus California blackberry, Pacific blackberry
native
Vine, Shrub 
© 2018 Ken Lunders 
© 2019 Ron Vanderhoff 
© 2015 Kelli Kallenborn |
|
Rumex acetosella Common sheep sorrel
• invasive non-native
Perennial herb 
© 2017 Gary McDonald 
© 2008 Steve Matson 
© 2019 Patrick Furtado |
|
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 |
|
Rumex salicifolius var. salicifolius Willow dock, Willow leaved dock
native
Perennial herb 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2023 Helen Hancock |
|
Sagina decumbens ssp. occidentalis Western pearlwort
native
Annual herb 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Salix laevigata Polished willow, Red willow
native
Tree 
© 2024 Ron Vanderhoff 
© 2024 Ron Vanderhoff 
© 2017 Steve Matson |
|
Salix lasiolepis Arroyo willow
native
Tree, Shrub 
© 2019 Steve Matson 
© 2022 Ron Vanderhoff 
© 2020 Steve Matson |
|
Salvia mellifera Black sage
native
Shrub 
© 2017 Steve Matson 
© 2022 Suzanne L. Weakley 
© 2019 Diane Etchison |
|
Salvia spathacea Hummingbird sage
native
Perennial herb 
© 2020 David Wolfson 
© 2020 Abby Nichols 
© 2015 Garth Wadsworth |
|
Sambucus nigra ssp. caerulea Blue elderberry
native
Tree, Shrub 
© 2021 Mike Russler 
© 2020 Diane Etchison 
© 2022 El Byrne |
|
Samolus parviflorus Water pimpernel
native
Perennial herb 
© 2023 Ron Vanderhoff 
© 2022 Catherine Chang 
© 2022 Catherine Chang |
|
Sanicula arguta Sharp toothed sanicle, Sharp toothed snakeroot, Sharptooth blacksnakeroot
native
Perennial herb 
© 2006 Steve Matson 
© 2006 Steve Matson 
© 2006 Steve Matson |
|
Sanicula crassicaulis Gamble weed, Pacific blacksnakeroot, Pacific sanicle
native
Perennial herb 
© 2023 Steve Conger 
© 2023 Steve Conger 
© 2021 Steve Laymon |
|
Schinus molle Peruvian pepper tree, Peruvian peppertree
• invasive non-native
Tree 
© 2021 stephen rosenthal 
© 2017 William McCarey 
© 2023 Ron Vanderhoff |
|
Scrophularia atrata Black flowered figwort, Darkflowered figwort
• rare native
Perennial herb 
© 2020 David Wolfson 
© 2018 David Wolfson 
© 2017 Gloria Hollahan |
|
Scrophularia californica ssp. californica California bee plant, California figwort
native
Perennial herb 
© 2020 Bob Sweatt 
© 2006 Steve Matson 
© 2019 Cynthia Powell |
|
Senecio vulgaris Common groundsel, Old man in the spring, Old man of spring
non-native
Annual herb 
© 2017 Barbara Boethling 
© 2023 Ron Vanderhoff 
© 2021 Toni Corelli |
|
Sidalcea malviflora ssp. laciniata Dwarf checkerbloom, Laciniate checker mallow
native
Perennial herb (rhizomatous) 
© 2024 Mike Russler 
© 2021 Maria Stokes 
© 2024 Mike Russler |
|
Silene gallica Common catchfly, Windmill pink
non-native
Annual herb 
© 2019 Mary Wloch 
© 2017 Gary McDonald 
© 2019 Gary McDonald |
|
Silene laciniata ssp. laciniata Cardinal catchfly
native
Perennial herb 
© 2020 David Greenberger 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Silene verecunda Dolores campion, San Francisco campion
native
Perennial herb 
© 2022 Cynthia Powell 
© 2022 Cynthia Powell 
© 2019 Matt Berger |
|
Silybum marianum Blessed milkthistle, Milk thistle
• invasive non-native
Annual, Perennial herb 
© 2020 Nancy Hamlett 
© 2019 Marisa Persaud 
© 2018 Angelique Herman |
|
Sisymbrium officinale Hedge mustard, Hedgemustard
non-native
Annual herb 
© 2021 Ann Garside 
© 2022 Julian Geoghegan 
© 2021 Ron Vanderhoff |
|
Solanum douglasii Douglas' nightshade, Greenspot nightshade
native
Perennial herb 
© 2006 Steve Matson 
© 2024 Mike Russler 
© 2006 Steve Matson |
|
Solidago elongata West coast canada goldenrod
native
Perennial herb 
© 2003 Steve Matson 
© 2021 Mike Russler 
© 2022 Steve Matson |
|
Solidago velutina ssp. californica California goldenrod, Oreja de liebre
native
Perennial herb 
© 2013 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 |
|
Sonchus oleraceus Common sow thistle, Common sowthistle, Sow thistle
non-native
Annual herb 
© 2019 Diane Etchison 
© 2015 Jesse Rorabaugh 
© 2024 Ron Vanderhoff |
|
Spergula arvensis Corn spurry
non-native
Annual herb 
© 2019 Diane Etchison 
© 2022 David Strauch 
© 2022 Cynthia Powell |
|
Spergularia rubra Purple sand spurry, Red sandspurry, Ruby sandspurry
non-native
Annual, Perennial herb 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Stachys bullata California hedge nettle, California hedgenettle, Southern hedge nettle
native
Perennial herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Stellaria media Chickweed
non-native
Annual herb 
© 2018 Gary McDonald 
© 2018 Gary McDonald 
© 2015 Diane Etchison |
|
Stellaria pallida Pale starwort
non-native
Annual herb 
© 2022 Donald Burk 
© 2004 Keir Morse 
© 2004 Keir Morse |
|
Stephanomeria elata Annual mitra, Santa barbara stephanomeria, Santa barbara wirelettuce
native
Annual herb 
© 2022 Sara Timby 
© 2018 Julian Geoghegan 
© 2021 Helen Hancock |
|
Stipa miliacea var. miliacea Smilo grass
• invasive non-native
Perennial grass 
© 2022 Donald Burk 
© 2022 Ron Vanderhoff 
© 2022 Donald Burk |
|
Stipa pulchra Purple needle grass
native
Perennial grass 
© 2019 Michelle Karle 
© 2008 Zoya Akulova 
© 2019 Ron Vanderhoff |
|
Symphoricarpos mollis Creeping snowberry, Trailing snowberry
native
Shrub 
© 2022 Dana York 
© 2020 Cara Wilcox 
© 2019 Ron Vanderhoff |
|
Symphyotrichum chilense California aster, Pacific aster
native
Perennial herb 
© 2020 Suzanne L. Weakley 
© 2013 Arcangelo Wessells 
© 2018 Stacie Wolny |
|
Taraxacum officinale Common dandelion
• invasive non-native
Perennial herb 
© 2021 Ron Vanderhoff 
© 2019 Diane Etchison 
© 2021 Ron Vanderhoff |
|
Thalictrum fendleri var. fendleri Fendler's meadow rue
native
Perennial herb 
© 2006 Steve Matson 
© 2006 Steve Matson 
© 2006 Steve Matson |
|
Torilis arvensis Field hedge parsley, Spreading hedgeparsley, Tall Sock-Destroyer
• invasive non-native
Annual herb 
© 2019 Ron Vanderhoff 
© 2017 Gary McDonald 
© 2018 Lindsey Hack |
|
Torilis nodosa Hedge parsley, Knotted hedge parsley, Knotted hedgeparsley
non-native
Annual herb 
© 2011 Steve Matson 
© 2011 Steve Matson 
© 2011 Steve Matson |
|
Trichostema lanatum Woolly bluecurls
native
Shrub 
© 2022 Mike Russler 
© 2017 Steve Matson 
© 2022 Mike Russler |
|
Trifolium ciliolatum Foothill clover, Tree clover
native
Annual herb 
© 2005 Steve Matson 
© 2005 Steve Matson 
© 2019 Rachelle Gray |
|
Trifolium depauperatum var. truncatum Dwarf sack clover
native
Annual herb 
© 2021 Ron Vanderhoff 
© 2024 Ryan O'Dell 
© 2021 Ron Vanderhoff |
|
Trifolium grayi Gray's clover
native
Annual herb 
© 2023 Matt Berger 
© 2007 Toni Corelli 
© 2023 Matt Berger |
|
Trifolium hirtum Rose clover
• invasive non-native
Annual herb 
© 2011 Steve Matson 
© 2011 Steve Matson 
© 2011 Steve Matson |
|
Trifolium incarnatum Crimson clover
non-native
Annual herb 
© 2021 Larry Dizmang 
© 2008 Steve Matson 
© 2023 R.A. Chasey |
|
Trifolium microcephalum Hairy clover, Small headed clover
native
Annual herb 
© 2005 Steve Matson 
© 2016 Michael Mitchell 
© 2019 Ron Vanderhoff |
|
Trifolium subterraneum Sub clover, Subterranean clover
non-native
Annual herb 
© 2017 Steve Matson 
© 2008 Steve Matson 
© 2024 Alaine Arslan |
|
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 |
|
Trifolium wormskioldii Coast clover, Cow clover, Cows clover
native
Perennial herb 
© 2021 Bob Sweatt 
© 2023 Mike Russler 
© 2021 Alison Gardner |
|
Triodanis biflora Venus looking glass, Venus' looking glass
native
Annual herb 
© 2020 Ken Hickman 
© 2015 Hayley Ross 
© 2018 Ken Hickman |
|
Triphysaria eriantha ssp. eriantha Butter 'n' eggs, Johnny tuck
native
Annual herb 
© 2005 Steve Matson 
© 2021 Steve Matson 
© 2008 Steve Matson |
|
Tropidocarpum gracile Dobie pod, Slender keel fruit, Slender tropidocarpum
native
Annual herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Uropappus lindleyi Silver puffs, Uropappus
native
Annual herb 
© 2019 Zack Abbey 
© 2019 Ron Vanderhoff 
© 2016 Ron Vanderhoff |
|
Urtica dioica ssp. holosericea Giant creek nettle, Hoary nettle, Mountain nettle
native
Perennial herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Urtica urens Annual stinging nettle, Dwarf nettle
non-native
Annual herb 
© 2019 Gary McDonald 
© 2022 Ron Vanderhoff 
© 2024 Lizbeth Velasco |
|
Vaccinium ovatum California huckleberry, Evergreen huckleberry
native
Shrub 
© 2017 James Gonsman 
© 2015 Chris Jaster 
© 2021 Mike Russler |
|
Verbena lasiostachys var. lasiostachys Vervain, Western vervain
native
Perennial herb 
© 2010 Steve Matson 
© 2010 Steve Matson 
© 2019 Mary Conway |
|
Vicia sativa ssp. nigra Common vetch, Garden vetch, Smaller common vetch
non-native
Annual herb, Vine 
© 2020 Ken Lunders 
© 2023 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Vicia villosa ssp. varia Smooth vetch, Thick fruited vetch, Winter vetch
non-native
Annual herb, Vine 
© 2019 Gary McDonald 
© 2017 Gary McDonald  © 2006 Steve Matson |
|
Viola pedunculata California golden violet, Johnny jump up
native
Perennial herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Xanthium spinosum Spiny clotbur, Spiny cockleburr
non-native
Annual herb 
© 2017 B.J. Dion 
© 2021 Lynn Overtree 
© 2017 B.J. Dion |
|
Xanthium strumarium Rough cockleburr
native
Annual herb 
© 2011 Steve Matson 
© 2011 Steve Matson 
© 2011 Steve Matson |
|
Zeltnera davyi Davy's centaury
native
Annual herb 
© 2018 Mary Conway 
© 2022 Irene Rosen 
© 2023 R.A. Chasey |
