logo Calflora  Illustrated Plant List 
Cottonwood Pass
Cottonwood Pass: Southern Diablo Range along Highway 41 corridor, northeastern corner of San Luis Obispo County

San Luis Obispo County

David Keil  / CNPS-SLO  (2019-06-09)

Record Detail Nearby Surveys What Grows Here?
204 PLANTS
Achillea millefolium    Common yarrow
native
Perennial herb

ASTERACEAE

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

Achyrachaena mollis    Blow-Wives
native
Annual herb

ASTERACEAE

Achyrachaena mollis
© 2015 Diane Etchison
Achyrachaena mollis
© 2022 Mike Russler
Achyrachaena mollis
© 2022 Mike Russler

Acmispon brachycarpus    hill lotus
native
Annual herb

FABACEAE

Acmispon brachycarpus
© 2005 Steve Matson
Acmispon brachycarpus
© 2005 Steve Matson
Acmispon brachycarpus
© 2018 Steve Matson

Acmispon wrangelianus    Wrangel lotus
native
Annual herb

FABACEAE

Acmispon wrangelianus
© 2016 Steve Matson
Acmispon wrangelianus
© 2016 Steve Matson
Acmispon wrangelianus
© 2016 Steve Matson

Allium crispum    Crinkled onion
native
Perennial herb (bulb)

ALLIACEAE

Allium crispum
© 2024 Steve Matson
Allium crispum
© 2024 Steve Matson
Allium crispum
© 2024 Steve Matson

Allium howellii var. howellii    Howell's onion
rare native
Perennial herb (bulb)

ALLIACEAE

Allium howellii var. howellii
© 2023 R.A. Chasey
Allium howellii var. howellii
© 2023 Mike Russler
Allium howellii var. howellii
© 2019 Matt Berger

Allophyllum gilioides ssp. gilioides    Dense false gilia,  Dense false gilyflower
native
Annual herb

POLEMONIACEAE

Allophyllum gilioides ssp. gilioides
© 2019 Matt Berger
Allophyllum gilioides ssp. gilioides
© 2021 Helen Hancock
Allophyllum gilioides ssp. gilioides
© 2019 Matt Berger

Amsinckia intermedia    Common fiddleneck
native
Annual herb

BORAGINACEAE

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

Amsinckia lycopsoides    Bugloss fiddleneck,  Tarweed fiddleneck
native
Annual herb

BORAGINACEAE

Amsinckia lycopsoides
© 2021 David popp
Amsinckia lycopsoides
© 2023 Catherine Chang
Amsinckia lycopsoides
© 2022 Catherine Chang

Amsinckia tessellata var. gloriosa    Bristly fiddleneck,  Large flowered devil's fiddleneck
native
Annual herb

BORAGINACEAE

Amsinckia tessellata var. gloriosa
© 2024 Ryan O'Dell
Amsinckia tessellata var. gloriosa
© 2019 Susan McDougall
Amsinckia tessellata var. gloriosa
© 2018 Richard Spjut

Amsinckia tessellata var. tessellata    Bristly fiddleneck,  Devil's lettuce
native
Annual herb

BORAGINACEAE

Amsinckia tessellata var. tessellata
© 2014 Steve Matson
Amsinckia tessellata var. tessellata
© 2014 Steve Matson
Amsinckia tessellata var. tessellata
© 2014 Steve Matson

Ancistrocarphus filagineus    False neststraw,  Woolly fishhooks
native
Annual herb

ASTERACEAE

Ancistrocarphus filagineus
© 2020 Matt Berger
Ancistrocarphus filagineus
© 2019 Gerald Carr
Ancistrocarphus filagineus
© 2021 Jacob Smith

Androsace elongata ssp. acuta    California androsace,  California rockjasmine
rare native
Annual herb

PRIMULACEAE

Androsace elongata ssp. acuta
© 2023 Catherine Chang
Androsace elongata ssp. acuta
© 2022 Catherine Chang
Androsace elongata ssp. acuta
© 2023 Helen Hancock

Antirrhinum ovatum    Oval leaved snapdragon
rare native
Annual herb

PLANTAGINACEAE

Antirrhinum ovatum
© 2013 Chris Winchell
Antirrhinum ovatum
© 2013 Chris Winchell
Antirrhinum ovatum
© 2022 Mike Russler

Aphyllon californicum ssp. condensum    California broomrape
native
Perennial herb (parasitic)

OROBANCHACEAE

Aphyllon californicum ssp. condensum
© 2023 Paul Excoffier
Aphyllon californicum ssp. condensum
© 2024 Mike Russler
Aphyllon californicum ssp. condensum
© 2024 Mike Russler

Artemisia californica    California sagebrush,  Coast sagebrush,  Coastal sage brush
native
Shrub

ASTERACEAE

Artemisia californica
© 2018 James Gonsman
Artemisia californica
© 2019 Aaron Echols
Artemisia californica
© 2018 Ron Vanderhoff

Astragalus asymmetricus    San joaquin milk vetch,  San joaquin milkvetch
native
Perennial herb

FABACEAE

Astragalus asymmetricus
© 2020 Susan McDougall
Astragalus asymmetricus
© 2020 Susan McDougall
Astragalus asymmetricus
© 2023 Catherine Chang

Astragalus didymocarpus var. didymocarpus    Common dwarf milkvetch,  Dwarf white milkvetch,  Two seeded milk vetch
native
Annual herb

FABACEAE

Astragalus didymocarpus var. didymocarpus
© 2016 Steve Matson
Astragalus didymocarpus var. didymocarpus
© 2016 Steve Matson
Astragalus didymocarpus var. didymocarpus
© 2016 Steve Matson

Astragalus douglasii var. douglasii    Douglas's milkvetch
native
Perennial herb

FABACEAE

Astragalus douglasii var. douglasii
© 2016 Steve Matson
Astragalus douglasii var. douglasii
© 2016 Steve Matson
Astragalus douglasii var. douglasii
© 2016 Steve Matson

Astragalus gambelianus    Dwarf loco weed,  Gambel's dwarf milk vetch,  Gambel's locoweed
native
Annual herb

FABACEAE

Astragalus gambelianus
© 2019 Ron Vanderhoff
Astragalus gambelianus
© 2019 Ron Vanderhoff
Astragalus gambelianus
© 2022 Mike Russler

Astragalus oxyphysus    Stanislaus milkvetch
native
Perennial herb

FABACEAE

Astragalus oxyphysus
© 2020 David Greenberger
Astragalus oxyphysus
© 2016 Steve Matson
Astragalus oxyphysus
© 2016 Steve Matson

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

BRASSICACEAE

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

rare native
Annual herb

CHENOPODIACEAE

Atriplex coronata var. coronata
© 2023 R.A. Chasey
Atriplex coronata var. coronata
© 2023 Cynthia Powell
Atriplex coronata var. coronata
© 2021 Cynthia Powell

Atriplex fruticulosa    Ball saltbush,  Valley saltbush
native
Perennial herb

CHENOPODIACEAE

Atriplex fruticulosa
© 2023 R.A. Chasey
Atriplex fruticulosa
© 2017 Adam Chasey
Atriplex fruticulosa
© 2021 Cynthia Powell

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

POACEAE

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

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

POACEAE

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

Bowlesia incana    Hoary bowlesia
native
Annual herb

APIACEAE

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

Bromus arizonicus    Arizona brome
native
Annual grass

POACEAE

Bromus arizonicus
© 2024 Matt C. Berger
Bromus arizonicus
© 2024 Matt C. Berger
Bromus arizonicus
© 2024 Matt C. Berger

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

POACEAE

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

Bromus madritensis    Foxtail chess, foxtail brome,  Madrid brome,  Spanish brome
non-native
Annual grass

POACEAE

Bromus madritensis
© 2022 Steve Matson
Bromus madritensis
© 2023 Stephen H Siemsen
Bromus madritensis
© 2015 Chris Jaster

Bromus rubens    Red brome
invasive non-native
Annual grass

POACEAE

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

Calandrinia menziesii    red maids,  Calandrinia
native
Annual herb

MONTIACEAE

Calandrinia menziesii
© 2021 Mary Ann Machi
Calandrinia menziesii
© 2019 Ron Vanderhoff
Calandrinia menziesii
© 2019 Ron Vanderhoff

Carduus pycnocephalus    Italian thistle
invasive non-native
Annual herb

ASTERACEAE

Carduus pycnocephalus
© 2019 Gary McDonald
Carduus pycnocephalus
© 2023 Diana Wahl
Carduus pycnocephalus
© 2017 Gary McDonald

Castilleja exserta ssp. exserta    Exserted indian paintbrush,  Pale purple owlclover,  Purple owl's clover
native
Annual herb

OROBANCHACEAE

Castilleja exserta ssp. exserta
© 2020 David Greenberger
Castilleja exserta ssp. exserta
© 2019 Ron Vanderhoff
Castilleja exserta ssp. exserta
© 2023 Ron Vanderhoff

Castilleja subinclusa var. jepsonii    Franciscan paint brush,  Longleaf indian paintbrush
native
Perennial herb

OROBANCHACEAE

Castilleja subinclusa var. jepsonii
© 2022 Dianne Lake
Castilleja subinclusa var. jepsonii
© 2022 Zoya Akulova-Barlow
Castilleja subinclusa var. jepsonii
© 2019 David popp

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

ASTERACEAE

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

Centaurea solstitialis    Barnaby's thistle,  Yellow star thistle
invasive non-native
Annual herb

ASTERACEAE

Centaurea solstitialis
© 2022 Cynthia Powell
Centaurea solstitialis
© 2019 Arlee Montalvo
Centaurea solstitialis
© 2022 Mary Herr

Centromadia pungens ssp. pungens    Common tarweed
native
Annual herb

ASTERACEAE

Centromadia pungens ssp. pungens
© 2022 Cynthia Powell
Centromadia pungens ssp. pungens
© 2021 Mike Russler
Centromadia pungens ssp. pungens
© 2024 Mike Russler

Chaenactis glabriuscula var. glabriuscula    Common yellow chaenactis,  Yellow pincushion
native
Annual herb

ASTERACEAE

Chaenactis glabriuscula var. glabriuscula
© 2020 David Greenberger
Chaenactis glabriuscula var. glabriuscula
© 2020 R.A. Chasey
Chaenactis glabriuscula var. glabriuscula
© 2020 R.A. Chasey

Chaenactis glabriuscula var. megacephala    Big headed yellow chaenactis,  Yellow pincushion
native
Annual herb

ASTERACEAE

Chaenactis glabriuscula var. megacephala
© 2017 Ryan Kelly
Chaenactis glabriuscula var. megacephala
© 2017 Ryan Kelly
Chaenactis glabriuscula var. megacephala
© 2009 Barry Breckling

Chaenactis stevioides    Desert pincushion,  Esteve pincushion
native
Annual herb

ASTERACEAE

Chaenactis stevioides
© 2020 Mitchell Coleman
Chaenactis stevioides
© 2019 Matt Berger
Chaenactis stevioides
© 2022 Steve Matson

Chorizanthe biloba var. biloba    Two lobed spineflower,  Twolobe spineflower
native
Annual herb

POLYGONACEAE

Chorizanthe biloba var. biloba
© 2006 Laura Ann Eliassen
Chorizanthe biloba var. biloba
© 2013 Chris Winchell
Chorizanthe biloba var. biloba
© 2013 Chris Winchell

Chorizanthe ventricosa    Priest valley spineflower
rare native
Annual herb

POLYGONACEAE

Chorizanthe ventricosa
© 2014 Neal Kramer
Chorizanthe ventricosa
© 2023 Ryan O'Dell
Chorizanthe ventricosa
© 2014 Neal Kramer

Chorizanthe xanti var. xanti    Riverside spineflower,  Xantus' spineflower
native
Annual herb

POLYGONACEAE

Chorizanthe xanti var. xanti
© 2021 Mike Russler
Chorizanthe xanti var. xanti
© 2020 Mike Russler
Chorizanthe xanti var. xanti
© 2021 Mike Russler

Cirsium occidentale var. venustum    Cobwebby thistle,  Red thistle,  Venus thistle
native
Perennial herb

ASTERACEAE

Cirsium occidentale var. venustum
© 2011 Steve Matson
Cirsium occidentale var. venustum
© 2011 Steve Matson
Cirsium occidentale var. venustum
© 2011 Steve Matson

Clarkia cylindrica ssp. cylindrica    Speckled clarkia
native
Annual herb

ONAGRACEAE

Clarkia cylindrica ssp. cylindrica
© 2019 David Greenberger
Clarkia cylindrica ssp. cylindrica
© 2019 Bryant Baker
Clarkia cylindrica ssp. cylindrica
© 2020 Steve Laymon

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

ONAGRACEAE

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

Clarkia unguiculata    Elegant clarkia,  Mountain garland,  Woodland clarkia
native
Annual herb

ONAGRACEAE

Clarkia unguiculata
© 2019 David Greenberger
Clarkia unguiculata
© 2019 Bryant Baker
Clarkia unguiculata
© 2021 Mike Russler

Claytonia exigua ssp. exigua    Little spring beauty,  Serpentine springbeauty,  Viridis
native
Annual herb

MONTIACEAE

Claytonia exigua ssp. exigua
© 2019 Steve Matson
Claytonia exigua ssp. exigua
© 2019 Steve Matson
Claytonia exigua ssp. exigua
© 2019 Steve Matson

Claytonia perfoliata ssp. perfoliata    Claytonia,  Miner's lettuce
native
Annual herb

MONTIACEAE

Claytonia perfoliata ssp. perfoliata
© 2008 Steve Matson
Claytonia perfoliata ssp. perfoliata
© 2008 Steve Matson
Claytonia perfoliata ssp. perfoliata
© 2008 Steve Matson

Collinsia heterophylla    Purple chinese houses
native
Annual herb

PLANTAGINACEAE

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

Collinsia sparsiflora var. collina    Hillside collinsia
native
Annual herb

PLANTAGINACEAE

Collinsia sparsiflora var. collina
© 2021 Steve Matson
Collinsia sparsiflora var. collina
© 2021 Steve Matson
Collinsia sparsiflora var. collina
© 2015 Steve Matson

Conium maculatum    Poison hemlock
invasive non-native
Perennial herb

APIACEAE

Conium maculatum
© 2019 James Bailey
Conium maculatum
© 2013 Toni Corelli
Conium maculatum
© 2016 Cynthia Powell

Convolvulus simulans    Small flowered morning glory
rare native
Annual herb

CONVOLVULACEAE

Convolvulus simulans
© 2016 Ron Vanderhoff
Convolvulus simulans
© 2017 James Bailey
Convolvulus simulans
© 2023 David Gowen

Corethrogyne filaginifolia    Common sandaster
native
Perennial herb

ASTERACEAE

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

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

CRASSULACEAE

Crassula connata
© 2020 Ron Vanderhoff
Crassula connata
© 2019 Ron Vanderhoff
Crassula connata
© 2019 Ron Vanderhoff

Cryptantha barbigera var. barbigera    Bearded cryptantha
native
Annual herb

BORAGINACEAE

Cryptantha barbigera var. barbigera
© 2014 Steve Matson
Cryptantha barbigera var. barbigera
© 2012 Terrence Gosliner
Cryptantha barbigera var. barbigera
© 2014 Steve Matson

Cryptantha clevelandii var. florosa    Coastal cryptantha
native
Annual herb

BORAGINACEAE

Cryptantha clevelandii var. florosa
© 2020 David Greenberger
Cryptantha clevelandii var. florosa
© 2020 Ryan Carle
Cryptantha clevelandii var. florosa
© 2023 Ken-ichi Ueda

Cryptantha intermedia var. intermedia    Common cryptantha
native
Annual herb

BORAGINACEAE

Cryptantha intermedia var. intermedia
© 2019 Ron Vanderhoff
Cryptantha intermedia var. intermedia
© 2021 Ron Vanderhoff
Cryptantha intermedia var. intermedia
© 2023 Ron Vanderhoff

Cryptantha nemaclada    Colusa cryptantha
native
Annual herb

BORAGINACEAE

Cryptantha nemaclada
© 2011 Steve Matson
Cryptantha nemaclada
© 2011 Steve Matson
Cryptantha nemaclada
© Donald Myrick1999 California Academy of Sciences

Cryptantha nevadensis var. rigida    Rigid cryptantha
native
Annual herb

BORAGINACEAE

Cryptantha nevadensis var. rigida
© 2016 Bill Thiessen
Cryptantha nevadensis var. rigida
© 2019 Mary Merriman
Cryptantha nevadensis var. rigida
© 2016 Bill Thiessen

Cryptantha oxygona    Sharp nut cryptantha,  Sharpnut cryptantha
native
Annual herb

BORAGINACEAE

Cryptantha oxygona
© 2022 Steve Matson
Cryptantha oxygona
© 2022 Steve Matson
Cryptantha oxygona
© 2020 Matt Berger

Cryptantha sparsiflora    Slender cryptantha
native
Annual herb

BORAGINACEAE

Cryptantha sparsiflora
© 2011 Steve Matson
Cryptantha sparsiflora
© 2011 Steve Matson

Deinandra halliana    Hall's tarplant
rare native
Annual herb

ASTERACEAE

Deinandra halliana
© 2023 R.A. Chasey
Deinandra halliana
© 2023 R.A. Chasey
Deinandra halliana
© 2023 R.A. Chasey

Deinandra kelloggii    Kellogg's tarweed
native
Annual herb

ASTERACEAE

Deinandra kelloggii
© 2023 R.A. Chasey
Deinandra kelloggii
© 2024 Mike Russler
Deinandra kelloggii
© 2024 Mike Russler

Deinandra pallida    Kern tarweed
native
Annual herb

ASTERACEAE

Deinandra pallida
© 2021 Mike Russler
Deinandra pallida
© 2021 Mike Russler
Deinandra pallida
© 2024 Bob Steele

Deinandra pentactis    Salinas river tarweed
native
Annual herb

ASTERACEAE

Deinandra pentactis
© 2015 Richard Spellenberg
Deinandra pentactis
© 2015 Richard Spellenberg
Deinandra pentactis
© 2023 Ryan O'Dell

Delphinium gypsophilum    Gypsum loving larkspur,  Pinoche creek larkspur
native
Perennial herb

RANUNCULACEAE

Delphinium gypsophilum
© 2016 Steve Matson
Delphinium gypsophilum
© 2016 Steve Matson
Delphinium gypsophilum
© 2016 Steve Matson

native
Perennial herb

THEMIDACEAE

Dipterostemon capitatus ssp. capitatus
© 2008 Steve Matson
Dipterostemon capitatus ssp. capitatus
© 2016 Steve Matson
Dipterostemon capitatus ssp. capitatus
© 2016 Steve Matson

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

POACEAE

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

Elymus multisetus    Big squirreltail grass
native
Perennial grass

POACEAE

Elymus multisetus
© 2019 Ron Vanderhoff
Elymus multisetus
© 2023 Helen Hancock
Elymus multisetus
© 2021 Denise Defreese

Ephedra viridis    Green ephedra,  Mormon tea,  Mountain ephedra
native
Shrub

EPHEDRACEAE

Ephedra viridis
© 2021 Bryant Baker
Ephedra viridis
© 2021 Bryant Baker
Ephedra viridis
© 2021 Bryant Baker

rare native
Annual herb

MALVACEAE

Eremalche parryi ssp. kernensis
© 2020 David Greenberger
Eremalche parryi ssp. kernensis
© 2018 Sarah Termondt
Eremalche parryi ssp. kernensis
© 2023 Mike Russler

Eremothera boothii ssp. decorticans    Shredding evening-primrose
native
Annual herb

ONAGRACEAE

Eremothera boothii ssp. decorticans
© 2019 Matt Berger
Eremothera boothii ssp. decorticans
© 2020 David Greenberger
Eremothera boothii ssp. decorticans
© 2020 Bryant Baker

Ericameria linearifolia    Interior goldenbush,  Linear leaved goldenbush,  Narrowleaf goldenbush
native
Shrub

ASTERACEAE

Ericameria linearifolia
© 2014 Steve Matson
Ericameria linearifolia
© 2014 Steve Matson
Ericameria linearifolia
© 2014 Steve Matson

Erigeron canadensis    Canada horseweed
native
Annual herb

ASTERACEAE

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

Eriogonum angulosum    Angled stem buckwheat,  Anglestem buckwheat
native
Annual herb

POLYGONACEAE

Eriogonum angulosum
© 2014 Steve Matson
Eriogonum angulosum
© 2016 Steve Matson
Eriogonum angulosum
© 2014 Steve Matson

Eriogonum covilleanum    Coville's buckwheat
native
Annual herb

POLYGONACEAE

Eriogonum covilleanum
© 2022 Mike Russler
Eriogonum covilleanum
© 2022 Mike Russler
Eriogonum covilleanum
© 2022 Mike Russler

Eriogonum elongatum var. elongatum    Long stemmed buckwheat
native
Perennial herb

POLYGONACEAE

Eriogonum elongatum var. elongatum
© 2017 Ron Vanderhoff
Eriogonum elongatum var. elongatum
© 2019 Aaron Echols
Eriogonum elongatum var. elongatum
© 2021 Mike Russler

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

POLYGONACEAE

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

Eriogonum fasciculatum var. polifolium    California buckwheat,  Eastern mojave buckwheat
native
Shrub

POLYGONACEAE

Eriogonum fasciculatum var. polifolium
© 2022 Steve Matson
Eriogonum fasciculatum var. polifolium
© 2022 Steve Matson
Eriogonum fasciculatum var. polifolium
© 2022 Steve Matson

Eriogonum nudum var. indictum    Naked buckwheat,  Protruding buckwheat
rare native
Perennial herb

POLYGONACEAE

Eriogonum nudum var. indictum
© 2021 Mike Russler
Eriogonum nudum var. indictum
© 2021 Mike Russler
Eriogonum nudum var. indictum
© 2021 Mike Russler

Eriogonum roseum    Wand buckwheat
native
Annual herb

POLYGONACEAE

Eriogonum roseum
© 2019 Matt Berger
Eriogonum roseum
© 2014 Steve Matson
Eriogonum roseum
© 2014 Steve Matson

Eriogonum temblorense    Temblor buckwheat
rare native
Annual herb

POLYGONACEAE

Eriogonum temblorense
© 2023 Matt Berger
Eriogonum temblorense
© 2023 Matt Berger
Eriogonum temblorense
© 2023 Matt Berger

Eriogonum viridescens    Bright green buckwheat,  Twotooth buckwheat
native
Annual herb

POLYGONACEAE

Eriogonum viridescens
© 2022 Ryan O'Dell
Eriogonum viridescens
© 2019 Matt Berger
Eriogonum viridescens
© 2021 Mike Russler

Eriophyllum confertiflorum var. confertiflorum    Golden yarrow,  Yellow yarrow
native
Shrub

ASTERACEAE

Eriophyllum confertiflorum var. confertiflorum
© 2013 James Gonsman
Eriophyllum confertiflorum var. confertiflorum
© 2020 Mary Conway
Eriophyllum confertiflorum var. confertiflorum
© 2020 Ron Vanderhoff

Erodium botrys    Big heron bill,  Broad leaf filaree,  Long beaked filaree
non-native
Annual herb

GERANIACEAE

Erodium botrys
© 2006 Steve Matson
Erodium botrys
© 2006 Steve Matson
Erodium botrys
© 2006 Steve Matson

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

GERANIACEAE

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

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

GERANIACEAE

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

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

GERANIACEAE

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

Erythranthe cardinalis    Cardinal monkey flower
native
Perennial herb

PHRYMACEAE

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

Eschscholzia californica    California poppy
native
Annual, Perennial herb

PAPAVERACEAE

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

Eschscholzia hypecoides    Leafy stemmed poppy,  San benito poppy
rare native
Annual herb

PAPAVERACEAE

Eschscholzia hypecoides
© 2022 Mike Russler
Eschscholzia hypecoides
© 2022 Mike Russler
Eschscholzia hypecoides
© 2022 Mike Russler

native
Annual herb

PAPAVERACEAE

Eschscholzia lemmonii ssp. lemmonii
© 2023 Ryan O'Dell
Eschscholzia lemmonii ssp. lemmonii
© 2023 Martin Schenker
Eschscholzia lemmonii ssp. lemmonii
© 2023 Ryan O'Dell

Eschscholzia minutiflora    Coville s poppy,  Pygmy poppy
native
Annual herb

PAPAVERACEAE

Eschscholzia minutiflora
© 2020 Diane Etchison
Eschscholzia minutiflora
© 2022 Steve Matson
Eschscholzia minutiflora
© 2017 Diane Etchison

Euphorbia spathulata    Reticulate seeded spurge,  Warty spurge
native
Annual herb

EUPHORBIACEAE

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

Festuca microstachys    Small fescue
native
Annual grass

POACEAE

Festuca microstachys
© 2011 Steve Matson
Festuca microstachys
© 2024 Emily R. Allen
Festuca microstachys
© 2011 Steve Matson

Festuca myuros    Rattail sixweeks grass
invasive non-native
Annual grass

POACEAE

Festuca myuros
© 2021 Aaron Echols
Festuca myuros
© 2021 Ron Vanderhoff
Festuca myuros
© 2022 John Rawlings

Festuca perennis    Italian rye grass
invasive non-native
Annual, Perennial grass

POACEAE

Festuca perennis
© 2019 Ron Vanderhoff
Festuca perennis
© 2017 Gary McDonald
Festuca perennis
© 2021 Ron Vanderhoff

Fritillaria agrestis    Stinkbells
rare native
Perennial herb (bulb)

LILIACEAE

Fritillaria agrestis
© 2023 Catherine Chang
Fritillaria agrestis
© 2022 Dee Shea Himes
Fritillaria agrestis
© 2021 Damon Tighe

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

RUBIACEAE

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

Gilia brecciarum    Nevada gilia,  Small gilia
native
Annual herb

POLEMONIACEAE

Gilia brecciarum
© 2016 Steve Matson
Gilia brecciarum
© 2016 Steve Matson
Gilia brecciarum
© 2016 Bob Sweatt

Gilia malior    Scrub gilia
native
Annual herb

POLEMONIACEAE

Gilia malior
© 2014 Steve Matson
Gilia malior
© 2014 Steve Matson
Gilia malior
© 2006 James M. Andre

Gilia tenuiflora ssp. amplifaucalis    Greater yellowthroat gilia,  Spreading slender flowered gilia
rare native
Annual herb

POLEMONIACEAE


Gilia tricolor ssp. diffusa    Bird's eye gilia,  Bird's eyes
native
Annual herb

POLEMONIACEAE

Gilia tricolor ssp. diffusa
© 2022 Steve Matson
Gilia tricolor ssp. diffusa
© 2022 Steve Matson
Gilia tricolor ssp. diffusa
© 2022 Steve Matson

Gilia tricolor ssp. tricolor    Bird's eye gilia,  Bird's eyes
native
Annual herb

POLEMONIACEAE

Gilia tricolor ssp. tricolor
© 2021 Steve Matson
Gilia tricolor ssp. tricolor
© 2021 Steve Matson
Gilia tricolor ssp. tricolor
© 2021 Steve Matson

Grindelia hirsutula    Gumweed,  Hairy gumweed
native
Perennial herb

ASTERACEAE

Grindelia hirsutula
© 2021 R.A. Chasey
Grindelia hirsutula
© 2020 R.A. Chasey
Grindelia hirsutula
© 2015 Ken Lunders

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

ASTERACEAE

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

Hazardia stenolepis    Narrow scaled goldenbush,  Serpentine bristleweed
native
Shrub (stem succulent)

ASTERACEAE

Hazardia stenolepis
© 2012 George Butterworth
Hazardia stenolepis
© 2012 George Butterworth
Hazardia stenolepis
© 2011 George Butterworth

Helianthus annuus    Common sunflower,  Hairy leaved sunflower,  Sunflower
native
Annual herb

ASTERACEAE

Helianthus annuus
© 2019 Bob Case
Helianthus annuus
© 2019 Bob Case
Helianthus annuus
© 2021 Mike Russler

Hirschfeldia incana    Mediterranean hoary mustard,  Short podded mustard,  Summer mustard
invasive non-native
Perennial herb

BRASSICACEAE

Hirschfeldia incana
© 2017 Gary McDonald
Hirschfeldia incana
© 2017 Gary McDonald
Hirschfeldia incana
© 2022 Ron Vanderhoff

Hollisteria lanata    False spikeflower,  False spineflower
native
Annual herb

POLYGONACEAE

Hollisteria lanata
© 2021 Mike Russler
Hollisteria lanata
© 2021 Mike Russler
Hollisteria lanata
© 2016 Steve Matson

Holocarpha heermannii    Heermann's tarweed
native
Annual herb

ASTERACEAE

Holocarpha heermannii
© 2018 Richard Spjut
Holocarpha heermannii
© 2022 Cynthia Powell
Holocarpha heermannii
© 2022 Cynthia Powell

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

POACEAE

Hordeum murinum ssp. leporinum
© 2022 Ron Vanderhoff
Hordeum murinum ssp. leporinum
© 2021 Al Keuter
Hordeum murinum ssp. leporinum
© 2021 Ron Vanderhoff

Hordeum vulgare    Common barley
non-native
Annual grass

POACEAE

Hordeum vulgare
© 2019 Ron Vanderhoff
Hordeum vulgare
© 2019 Ron Vanderhoff
Hordeum vulgare
© 2022 Ron Vanderhoff

Isocoma acradenia var. bracteosa    Bracted alkali goldenbush
native
Shrub

ASTERACEAE

Isocoma acradenia var. bracteosa
© 2021 Mike Russler
Isocoma acradenia var. bracteosa
© 2021 Mike Russler
Isocoma acradenia var. bracteosa
© 2021 Mike Russler

Juniperus californica    California juniper
native
Shrub

CUPRESSACEAE

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

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

ASTERACEAE

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

Lagophylla ramosissima    Branched lagophylla,  Common hareleaf
native
Annual herb

ASTERACEAE

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

Lamarckia aurea    Goldentop grass
non-native
Annual grass

POACEAE

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

Lasthenia gracilis    Needle goldfields
native
Annual herb

ASTERACEAE

Lasthenia gracilis
© 2014 Steve Matson
Lasthenia gracilis
© 2014 Steve Matson
Lasthenia gracilis
© 2014 Steve Matson

Lasthenia minor    Coastal goldfields,  Smooth lasthenia,  Woolly goldfields
native
Annual herb

ASTERACEAE

Lasthenia minor
© 2007 Toni Corelli
Lasthenia minor
© 2019 James Gonsman
Lasthenia minor
© 2015 Toni Corelli

Layia glandulosa    White layia,  White tidy tips,  Whitedaisy tidytips
native
Annual herb

ASTERACEAE

Layia glandulosa
© 2016 James Gonsman
Layia glandulosa
© 2021 Mike Russler
Layia glandulosa
© 2021 Mike Russler

Layia heterotricha    Pale yellow layia,  Paleyellow tidytips
rare native
Annual herb

ASTERACEAE

Layia heterotricha
© 2021 Mike Russler
Layia heterotricha
© 2021 Mike Russler
Layia heterotricha
© 2018 Sarah Termondt

Layia munzii    Munz's tidy tips,  Munz's tidytips
rare native
Annual herb

ASTERACEAE

Layia munzii
© 2006 Steve Matson
Layia munzii
© 2015 Craig Fiehler
Layia munzii
© 2006 Steve Matson

Layia pentachaeta ssp. albida    Sierra tidytips,  White sierra tidy tips
native
Annual herb

ASTERACEAE

Layia pentachaeta ssp. albida
© 2024 Mike Russler
Layia pentachaeta ssp. albida
© 2023 Ryan O'Dell
Layia pentachaeta ssp. albida
© 2020 David Greenberger

Lemna sp.    Small Tree-Mallow


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

BRASSICACEAE

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

Leptosiphon parviflorus    Variable linanthus
native
Annual herb

POLEMONIACEAE

Leptosiphon parviflorus
© 2008 Keir Morse
Leptosiphon parviflorus
© 2008 Keir Morse
Leptosiphon parviflorus
© 2008 Keir Morse

Leptosyne bigelovii    Bigelow coreopsis
native
Annual herb

ASTERACEAE

Leptosyne bigelovii
© 2022 Mike Russler
Leptosyne bigelovii
© 2020 John L. Thompson
Leptosyne bigelovii
© 2020 Matt Berger

Leptosyne calliopsidea    Leafy stemmed coreopsis
native
Annual herb

ASTERACEAE

Leptosyne calliopsidea
© 2016 Steve Matson
Leptosyne calliopsidea
© 2016 Steve Matson
Leptosyne calliopsidea
© 2016 Steve Matson

native
Annual herb

POLEMONIACEAE

Linanthus dichotomus ssp. dichotomus
© 2019 Jacob Smith
Linanthus dichotomus ssp. dichotomus
© 2008 Steve Matson
Linanthus dichotomus ssp. dichotomus
© 2021 Mike Russler

Lithophragma parviflorum var. parviflorum    Pink woodland star,  Smallflower woodland star
native
Perennial herb

SAXIFRAGACEAE

Lithophragma parviflorum var. parviflorum
© 2013 Jean Pawek
Lithophragma parviflorum var. parviflorum
© 2019 Gary McDonald
Lithophragma parviflorum var. parviflorum
© 2013 Jean Pawek

Logfia filaginoides    California cottonrose
native
Annual herb

ASTERACEAE

Logfia filaginoides
© 2019 Steve Matson
Logfia filaginoides
© 2019 Steve Matson
Logfia filaginoides
© 2019 Steve Matson

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

APIACEAE

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

Lupinus albifrons var. albifrons    Silver bush lupine,  Silver lupine
native
Shrub

FABACEAE

Lupinus albifrons var. albifrons
© 2012 Michael Mitchell
Lupinus albifrons var. albifrons
© 2020 Richard Spjut
Lupinus albifrons var. albifrons
© 2020 Susan McDougall

Lupinus bicolor    Annual lupine,  Bicolored lupine,  Miniature lupine
native
Annual, Perennial herb

FABACEAE

Lupinus bicolor
© 2024 Mary Ann Machi
Lupinus bicolor
© 2022 Mike Russler
Lupinus bicolor
© 2024 Mary Ann Machi

Lupinus microcarpus var. microcarpus    Chick lupine,  Valley lupine
native
Annual herb

FABACEAE

Lupinus microcarpus var. microcarpus
© 2006 Steve Matson
Lupinus microcarpus var. microcarpus
© 2006 Steve Matson
Lupinus microcarpus var. microcarpus
© 2006 Steve Matson

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

FABACEAE

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

Madia radiata    Golden madia,  Showy madia
rare native
Annual herb

ASTERACEAE

Madia radiata
© 2023 Jacob Smith
Madia radiata
© 2016 George Butterworth
Madia radiata
© 2016 George Butterworth

Malacothrix coulteri    Snake's head
native
Annual herb

ASTERACEAE

Malacothrix coulteri
© 2020 David Greenberger
Malacothrix coulteri
© 2020 Matt Berger
Malacothrix coulteri
© 2020 David Greenberger

Malacothrix floccifera    Woolly dandelion,  Woolly desertdandelion,  Woolly malacothrix
native
Annual herb

ASTERACEAE

Malacothrix floccifera
© 2020 Stacie Wolny
Malacothrix floccifera
© 2020 David Greenberger
Malacothrix floccifera
© 2018 Stacie Wolny

Malva parviflora    Cheeseweed mallow
non-native
Annual herb

MALVACEAE

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

Marah fabacea    California man-root
native
Perennial herb, Vine

CUCURBITACEAE

Marah fabacea
© 2018 Gary McDonald
Marah fabacea
© 2018 MCOSD EDRR
Marah fabacea
© 2021 Cyril Guyot

Matricaria discoidea    Pineapple weed
native
Annual herb

ASTERACEAE

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

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

FABACEAE

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

Melica californica    California melicgrass
native
Perennial grass

POACEAE

Melica californica
© 2023 John Rawlings
Melica californica
© 2021 John Rawlings
Melica californica
© 2022 John Rawlings

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

FABACEAE

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

Mentzelia pectinata    San joaquin blazing star,  San joaquin blazingstar
native
Annual herb

LOASACEAE

Mentzelia pectinata
© 2021 Mike Russler
Mentzelia pectinata
© 2021 Mike Russler
Mentzelia pectinata
© 2021 Mike Russler

Micranthes californica    Greene's saxifrage
native
Perennial herb

SAXIFRAGACEAE

Micranthes californica
© 2016 Steve Matson
Micranthes californica
© 2016 Steve Matson
Micranthes californica
© 2016 Steve Matson

Micropus californicus var. californicus    Q tips,  Slender cottonweed
native
Annual herb

ASTERACEAE

Micropus californicus var. californicus
© 2006 Steve Matson
Micropus californicus var. californicus
© 2021 Ron Vanderhoff
Micropus californicus var. californicus
© 2016 Steve Matson

Microseris campestris    San joaquin microseris,  San joaquin silverpuffs
native
Annual herb

ASTERACEAE

Microseris campestris
© 2023 Ryan O'Dell
Microseris campestris
© 2023 Ryan O'Dell
Microseris campestris
© 2022 Dianne Lake

Microseris douglasii ssp. douglasii    Douglas' microseris,  Douglas' silverpuffs
native
Annual herb

ASTERACEAE

Microseris douglasii ssp. douglasii
© 2017 Steve Matson
Microseris douglasii ssp. douglasii
© 2017 Steve Matson
Microseris douglasii ssp. douglasii
© 2017 Steve Matson

Microsteris gracilis    Slender phlox
native
Annual herb

POLEMONIACEAE

Microsteris gracilis
© 2003 Steve Matson
Microsteris gracilis
© 2016 Steve Matson
Microsteris gracilis
© 2003 Steve Matson

Mirabilis laevis var. crassifolia    California four o'clock
native
Perennial herb

NYCTAGINACEAE

Mirabilis laevis var. crassifolia
© 2014 Steve Matson
Mirabilis laevis var. crassifolia
© 2014 Steve Matson
Mirabilis laevis var. crassifolia
© 2014 Steve Matson

Monolopia lanceolata    Common monolopia
native
Annual herb

ASTERACEAE

Monolopia lanceolata
© 2016 Steve Matson
Monolopia lanceolata
© 2016 Steve Matson
Monolopia lanceolata
© 2016 Steve Matson

Navarretia mitracarpa    Paso robles navarretia
native
Annual herb

POLEMONIACEAE

Navarretia mitracarpa
© 2022 Mike Russler
Navarretia mitracarpa
© 2019 David Greenberger
Navarretia mitracarpa
© 2022 Mike Russler

Nemophila menziesii    Baby blue eyes
native
Annual herb

HYDROPHYLLACEAE

Nemophila menziesii
© 2019 Matt Berger
Nemophila menziesii
© 2019 Diane Etchison
Nemophila menziesii
© 2019 Ron Vanderhoff

Nemophila pedunculata    Littlefoot nemophila,  Meadow nemophila
native
Annual herb

HYDROPHYLLACEAE

Nemophila pedunculata
© 2003 Steve Matson
Nemophila pedunculata
© 2020 Bob Sweatt
Nemophila pedunculata
© 2024 Alaine Arslan

Pectocarya anisocarpa    Small Tree-Mallow


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

BORAGINACEAE

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

Pectocarya setosa    Moth combseed,  Stiff stemmed comb bur
native
Annual herb

BORAGINACEAE

Pectocarya setosa
© 2014 Steve Matson
Pectocarya setosa
© 2009 Steve Matson
Pectocarya setosa
© 2014 Steve Matson

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

HYDROPHYLLACEAE

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

Phacelia douglasii var. petrophila    Douglas' phacelia,  Rockloving phacelia
native
Annual herb

HYDROPHYLLACEAE

Phacelia douglasii var. petrophila
© 2020 David Greenberger
Phacelia douglasii var. petrophila
© 2021 R.A. Chasey
Phacelia douglasii var. petrophila
© 2021 R.A. Chasey

Phacelia fremontii    Fremont's phacelia
native
Annual herb

HYDROPHYLLACEAE

Phacelia fremontii
© 2022 Steve Matson
Phacelia fremontii
© 2022 Mike Russler
Phacelia fremontii
© 2014 Steve Conger

Phacelia tanacetifolia    Lacy phacelia,  Tansy leafed phacelia
native
Annual herb

HYDROPHYLLACEAE

Phacelia tanacetifolia
© 2022 Mike Russler
Phacelia tanacetifolia
© 2024 Bob Steele
Phacelia tanacetifolia
© 2022 Charles Russell

Pholistoma membranaceum    White fiesta flower,  White fiestaflower
native
Annual herb

HYDROPHYLLACEAE

Pholistoma membranaceum
© 2005 Steve Matson
Pholistoma membranaceum
© 2016 Steve Matson
Pholistoma membranaceum
© 2016 Steve Matson

Plagiobothrys arizonicus    Arizona popcorn flower,  Arizona popcornflower
native
Annual herb

BORAGINACEAE

Plagiobothrys arizonicus
© 2020 Steve Matson
Plagiobothrys arizonicus
© 2020 Steve Matson
Plagiobothrys arizonicus
© 2020 Steve Matson

Plagiobothrys canescens    Grey popcorn flower,  Valley popcorn flower,  Valley popcornflower
native
Annual herb

BORAGINACEAE

Plagiobothrys canescens
© 2022 Catherine Chang
Plagiobothrys canescens
© 2016 Steve Matson
Plagiobothrys canescens
© 2016 Steve Matson

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

PLANTAGINACEAE

Plantago erecta
© 2008 Steve Matson
Plantago erecta
© 2022 Steve Matson
Plantago erecta
© 2022 Steve Matson

Platystemon californicus    Cream cups,  Creamcups
native
Annual herb

PAPAVERACEAE

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

Poa secunda ssp. secunda    One sided blue grass,  Pine bluegrass,  Sandberg's bluegrass
native
Perennial grass

POACEAE

Poa secunda ssp. secunda
© 2018 Ron Vanderhoff
Poa secunda ssp. secunda
© 2018 Ron Vanderhoff
Poa secunda ssp. secunda
© 2018 Ron Vanderhoff

Polypogon interruptus    Ditch beard grass,  Ditch rabbitsfoot grass
non-native
Perennial grass

POACEAE

Polypogon interruptus
© 2022 John Rawlings
Polypogon interruptus
© 2022 John Rawlings
Polypogon interruptus
© 2020 Ron Vanderhoff

Populus fremontii ssp. fremontii    Fremont cottonwood
native
Tree

SALICACEAE

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

Quercus douglasii    Blue oak
native
Tree

FAGACEAE

Quercus douglasii
© 2018 Gary McDonald
Quercus douglasii
© 2020 Charles Russell
Quercus douglasii
© 2019 Susan McDougall

Quercus john-tuckeri    Tucker oak,  Tucker's oak
native
Tree

FAGACEAE

Quercus john-tuckeri
© 2019 Richard Spjut
Quercus john-tuckeri
© 2015 Keir Morse
Quercus john-tuckeri
© 2019 Richard Spjut

Quercus lobata    California white oak,  Valley oak
native
Tree

FAGACEAE

Quercus lobata
© 2023 Helen Hancock
Quercus lobata
© 2021 Cynthia Powell
Quercus lobata
© 2023 Suzanne L. Weakley

Salix laevigata    Polished willow,  Red willow
native
Tree

SALICACEAE

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

Salvia columbariae    Chia sage
native
Annual herb

LAMIACEAE

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

Salvia mellifera    Black sage
native
Shrub

LAMIACEAE

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

Sambucus nigra ssp. caerulea    Blue elderberry
native
Tree, Shrub

VIBURNACEAE

Sambucus nigra ssp. caerulea
© 2021 Mike Russler
Sambucus nigra ssp. caerulea
© 2020 Diane Etchison
Sambucus nigra ssp. caerulea
© 2022 El Byrne

Sanicula bipinnata    Poison sanicle
native
Perennial herb

APIACEAE

Sanicula bipinnata
© 2008 Steve Matson
Sanicula bipinnata
© 2008 Steve Matson
Sanicula bipinnata
© 2022 R.A. Chasey

Senecio californicus    California butterweed,  California groundsel,  California ragwort
native
Annual herb

ASTERACEAE

Senecio californicus
© 2019 Diane Etchison
Senecio californicus
© 2023 Ron Vanderhoff
Senecio californicus
© 2022 Ron Vanderhoff

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

ASTERACEAE

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

Sinapis arvensis    Charlock mustard
invasive non-native
Annual herb

BRASSICACEAE

Sinapis arvensis
© 2020 Randy Huey
Sinapis arvensis
© 2022 Mike Russler
Sinapis arvensis
© 2023 Andy Ford

Sisymbrium orientale    Indian hedge mustard,  Oriental hedge mustard
non-native
Annual, Perennial herb

BRASSICACEAE

Sisymbrium orientale
© 2019 Diane Etchison
Sisymbrium orientale
© 2021 Paul Aigner
Sisymbrium orientale
© 2021 Ron Vanderhoff

Solanum umbelliferum var. umbelliferum    Blue witch nightshade,  Bluewitch nightshade
native
Shrub

SOLANACEAE

Solanum umbelliferum var. umbelliferum
© 2014 Steve Matson
Solanum umbelliferum var. umbelliferum
© 2014 Steve Matson
Solanum umbelliferum var. umbelliferum
© 2014 Steve Matson

Stachys pycnantha    Short spike hedge nettle,  Shortspike hedgenettle
native
Perennial herb

LAMIACEAE

Stachys pycnantha
© 2023 David Wolfson
Stachys pycnantha
© 2019 David Wolfson
Stachys pycnantha
© 2021 Dan Quinn

Stebbinsoseris heterocarpa    Grassland stebbinsoseris
native
Annual herb

ASTERACEAE

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

Stellaria nitens    Shining chickweed,  Shiny chickweed,  Smooth chickweed
native
Annual herb

CARYOPHYLLACEAE

Stellaria nitens
© 2022 Catherine Chang
Stellaria nitens
© 2022 Catherine Chang
Stellaria nitens
© 2020 Ken Hickman

Stephanomeria pauciflora    Brownplume wirelettuce,  Desert straw,  Wire lettuce
native
Perennial herb

ASTERACEAE

Stephanomeria pauciflora
© 2015 Steve Matson
Stephanomeria pauciflora
© 2015 Steve Matson
Stephanomeria pauciflora
© 2015 Steve Matson

Stipa speciosa    Desert needle grass
native
Perennial grass

POACEAE

Stipa speciosa
© 2011 Steve Matson
Stipa speciosa
© 2022 Steve Matson
Stipa speciosa
© 2022 Steve Matson

Streptanthus anceps    Lemmon's mustard
native
Annual herb

BRASSICACEAE

Streptanthus anceps
© 2006 Steve Matson
Streptanthus anceps
© 2006 Steve Matson
Streptanthus anceps
© 2006 Steve Matson

Streptanthus lasiophyllus    Small Tree-Mallow


Streptanthus lemmonii    Lemmon's jewelflower,  Lemmon's wild cabbage
rare native
Annual herb

BRASSICACEAE

Streptanthus lemmonii
© 2016 Craig Fiehler
Streptanthus lemmonii
© 2023 Ellen Uhler
Streptanthus lemmonii
© 2011 Dylan Neubauer

Tetrapteron graciliflorum    Hill sun cup
native
Annual herb

ONAGRACEAE

Tetrapteron graciliflorum
© 2021 Charles Russell
Tetrapteron graciliflorum
© 2010 Richard Spjut
Tetrapteron graciliflorum
© 2016 Richard Spjut

native
Annual herb

BRASSICACEAE

Thysanocarpus curvipes ssp. curvipes
© 2016 Steve Matson
Thysanocarpus curvipes ssp. curvipes
© 2016 Steve Matson
Thysanocarpus curvipes ssp. curvipes
© 2016 Steve Matson

Thysanocarpus laciniatus    Common lace pod,  Mountain fringepod,  Narrow leaved fringe pod
native
Annual herb

BRASSICACEAE

Thysanocarpus laciniatus
© 2021 Helen Hancock
Thysanocarpus laciniatus
© 2021 R.A. Chasey
Thysanocarpus laciniatus
© 2021 Helen Hancock

Trifolium albopurpureum    Indian clover,  Rancheria clover
native
Annual herb

FABACEAE

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

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

FABACEAE

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

Trifolium willdenovii    Tomcat clover
native
Annual herb

FABACEAE

Trifolium willdenovii
© 2024 Steve Conger
Trifolium willdenovii
© 2024 Steve Conger
Trifolium willdenovii
© 2018 Stacie Wolny

Uropappus lindleyi    Silver puffs,  Uropappus
native
Annual herb

ASTERACEAE

Uropappus lindleyi
© 2019 Zack Abbey
Uropappus lindleyi
© 2019 Ron Vanderhoff
Uropappus lindleyi
© 2016 Ron Vanderhoff

Verbascum virgatum    Wand mullein
non-native
Perennial herb

SCROPHULARIACEAE

Verbascum virgatum
© 2019 Jerry Thornton
Verbascum virgatum
© 2022 Amber Bedgood
Verbascum virgatum
© 2021 Ron Vanderhoff

Zannichellia palustris    Horned pondweed
native
Perennial herb

ZANNICHELLIACEAE

Zannichellia palustris
© 2021 Ron Vanderhoff
Zannichellia palustris
© 2021 Ron Vanderhoff
Zannichellia palustris
© 2021 Ron Vanderhoff