logo Calflora  Illustrated Plant List 
Red Hill Mesa
Red Hill Mesa, La Panza Mountains, San Luis Obispo County, California

San Luis Obispo County

David Keil  / CNPS-SLO  (2019-06-07)

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

ASTERACEAE

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

Acmispon americanus var. americanus    American bird's foot trefoil,  American trefoil,  Spanish lotus
native
Annual herb

FABACEAE

Acmispon americanus var. americanus
© 2015 Steve Matson
Acmispon americanus var. americanus
© 2015 Steve Matson
Acmispon americanus var. americanus
© 2015 Steve Matson

Acmispon brachycarpus    hill lotus
native
Annual herb

FABACEAE

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

native
Perennial herb

FABACEAE

Acmispon glaber var. glaber
© 2020 Ron Vanderhoff
Acmispon glaber var. glaber
© 2020 Ron Vanderhoff
Acmispon glaber var. glaber
© 2020 Ron Vanderhoff

Acmispon micranthus    Small flowered lotus
native
Annual herb

FABACEAE

Acmispon micranthus
© 2016 Aaron Echols
Acmispon micranthus
© 2016 James Bailey
Acmispon micranthus
© 2019 Ron Vanderhoff

Acmispon strigosus    Strigose lotus
native
Annual herb

FABACEAE

Acmispon strigosus
© 2016 Steve Matson
Acmispon strigosus
© 2009 Steve Matson
Acmispon strigosus
© 2016 Steve Matson

Acourtia microcephala    Sacapellote
native
Perennial herb

ASTERACEAE

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

native
Annual herb

ASTERACEAE

Agoseris heterophylla var. heterophylla
© 2003 Steve Matson
Agoseris heterophylla var. heterophylla
© 2003 Steve Matson
Agoseris heterophylla var. heterophylla
© 2003 Steve Matson

Allium lacunosum var. davisiae    Davis' pitted onion
native
Perennial herb (bulb)

ALLIACEAE

Allium lacunosum var. davisiae
© 2023 Bob Steele
Allium lacunosum var. davisiae
© 2016 Brian Bielfelt
Allium lacunosum var. davisiae
© 2023 Bob Steele

Allium peninsulare var. peninsulare    Mexicali onion,  Penisula onion
native
Perennial herb (bulb)

ALLIACEAE

Allium peninsulare var. peninsulare
© 2019 Ron Vanderhoff
Allium peninsulare var. peninsulare
© 2019 Ron Vanderhoff
Allium peninsulare var. peninsulare
© 2021 Mike Russler

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

BORAGINACEAE

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

native
Perennial herb

PLANTAGINACEAE

Antirrhinum thompsonii
© 2018 Michael Mitchell
Antirrhinum thompsonii
© Geoff Burleigh
Antirrhinum thompsonii
© 2016 Kristin Sabo

Aphanes occidentalis    Western lady's mantle
native
Annual, Perennial herb

ROSACEAE

Aphanes occidentalis
© 2019 Ron Vanderhoff
Aphanes occidentalis
© 2017 Ron Vanderhoff
Aphanes occidentalis
© 2023 R.A. Chasey

Aphyllon purpureum    Purple broomrape
native
Annual herb

OROBANCHACEAE

Aphyllon purpureum
© 2022 Helen Hancock
Aphyllon purpureum
© 2023 Katie O'Hara-Kelly
Aphyllon purpureum
© 2022 Dana York

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

APIACEAE

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

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

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

BRASSICACEAE

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

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

POACEAE

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

Baccharis salicifolia    Mule fat., seep willow,  Mule's fat,  Mulefat
native
Shrub

ASTERACEAE

Baccharis salicifolia
© 2023 Julia Markey
Baccharis salicifolia
© 2020 Aaron Echols
Baccharis salicifolia
© 2023 Julia Markey

Blepharizonia laxa    Glandular big tarweed
native
Annual herb

ASTERACEAE

Blepharizonia laxa
© 2019 Jacob Smith
Blepharizonia laxa
© 2021 Mike Russler
Blepharizonia laxa
© 2021 Mike Russler

Bloomeria crocea var. aurea    Common goldenstar
native
Perennial herb

THEMIDACEAE

Bloomeria crocea var. aurea
© 2019 David Greenberger
Bloomeria crocea var. aurea
© 2020 Kimberly Coates
Bloomeria crocea var. aurea
© 2018 Gary McDonald

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

THEMIDACEAE

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

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

POACEAE

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

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

POACEAE

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

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

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

PLANTAGINACEAE

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

Calochortus simulans    San luis obispo mariposa lily
rare native
Perennial herb (bulb)

LILIACEAE

Calochortus simulans
© 2019 David Greenberger
Calochortus simulans
© 2019 David Greenberger
Calochortus simulans
© 2020 John L. Thompson

Calycadenia villosa    Dwarf calycadenia
rare native
Annual herb

ASTERACEAE

Calycadenia villosa
© 2016 David Wolfson
Calycadenia villosa
© 2015 David Wolfson
Calycadenia villosa
© 2004 Laura Ann Eliassen

Calystegia malacophylla ssp. pedicellata    Jepson's morning glory,  Sierra false bindweed
native
Perennial herb

CONVOLVULACEAE

Calystegia malacophylla ssp. pedicellata
© 2021 R.A. Chasey
Calystegia malacophylla ssp. pedicellata
© 2020 David Greenberger
Calystegia malacophylla ssp. pedicellata
© 2021 Dick Rawson

Camissonia strigulosa    Contorted primrose,  Sandysoil suncup,  Strigose sun cup
native
Annual herb

ONAGRACEAE

Camissonia strigulosa
© 2015 Diane Etchison
Camissonia strigulosa
© 2011 Michael Mitchell
Camissonia strigulosa
© 2015 Diane Etchison

Camissoniopsis intermedia    Intermediate sun cups
native
Annual herb

ONAGRACEAE

Camissoniopsis intermedia
© 2017 David Greenberger
Camissoniopsis intermedia
© 2016 Erik Larsen
Camissoniopsis intermedia
© 2018 Alice Cummings

Camissoniopsis micrantha    Spencer primrose
native
Annual herb

ONAGRACEAE

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

Castilleja attenuata    Narrow leaved owl's clover,  Valley tassels
native
Annual herb

OROBANCHACEAE

Castilleja attenuata
© 2024 Steve Conger
Castilleja attenuata
© 2024 Mary Ann Machi
Castilleja attenuata
© 2019 Timothy Boomer

Castilleja densiflora ssp. densiflora    Dense flower owl's clover,  Denseflower indian paintbrush
native
Annual herb

OROBANCHACEAE

Castilleja densiflora ssp. densiflora
© 2018 Hayley Ross
Castilleja densiflora ssp. densiflora
© 2019 Verna Jigour
Castilleja densiflora ssp. densiflora
© 2022 Alice Cummings

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

Ceanothus cuneatus var. cuneatus    Buck brush,  Buckbrush
native
Shrub

RHAMNACEAE

Ceanothus cuneatus var. cuneatus
© 2022 Ryan O'Dell
Ceanothus cuneatus var. cuneatus
© 2021 Steve Matson
Ceanothus cuneatus var. cuneatus
© 2019 Cara Wilcox

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

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

CARYOPHYLLACEAE

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

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

ROSACEAE

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

Chlorogalum pomeridianum var. pomeridianum    Common soaproot,  Wavyleaf soap plant
native
Perennial herb

AGAVACEAE

Chlorogalum pomeridianum var. pomeridianum
© 2021 Sue Graue
Chlorogalum pomeridianum var. pomeridianum
© 2015 Sharon King & Randy Aeschliman
Chlorogalum pomeridianum var. pomeridianum
© 2018 Karen Scheuermann

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 douglasii    Douglas's spineflower,  San benito spineflower
rare native
Annual herb

POLYGONACEAE

Chorizanthe douglasii
© 2022 Irene Rosen
Chorizanthe douglasii
© 2019 David Greenberger
Chorizanthe douglasii
© 2022 Irene Rosen

Chorizanthe polygonoides var. polygonoides    Knotweed spineflower
native
Annual herb

POLYGONACEAE

Chorizanthe polygonoides var. polygonoides
© 2024 Jordan Collins
Chorizanthe polygonoides var. polygonoides
© 2024 Jordan Collins
Chorizanthe polygonoides var. polygonoides
© 2023 R.A. Chasey

Chorizanthe staticoides    Turkish rugging
native
Annual herb

POLYGONACEAE

Chorizanthe staticoides
© 2019 Ron Vanderhoff
Chorizanthe staticoides
© 2019 Bryant Baker
Chorizanthe staticoides
© 2019 Ron Vanderhoff

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 vulgare    Bull thistle
invasive non-native
Perennial herb

ASTERACEAE

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

Clarkia affinis    Chaparral clarkia,  Chaparral fairyfan
native
Annual herb

ONAGRACEAE

Clarkia affinis
© 2019 David Greenberger
Clarkia affinis
© 2019 Ken Hickman
Clarkia affinis
© 2020 Steve Laymon

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 epilobioides    Canyon clarkia,  Willow herb clarkia
native
Annual herb

ONAGRACEAE

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

Clarkia modesta    Waltham Creek clarkia
native
Annual herb

ONAGRACEAE

Clarkia modesta
© 2020 David Greenberger
Clarkia modesta
© 2020 Steve Laymon
Clarkia modesta
© 2019 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 speciosa ssp. speciosa    Red spot clarkia,  Redspot clarkia
native
Annual herb

ONAGRACEAE

Clarkia speciosa ssp. speciosa
© 2019 Steve Laymon
Clarkia speciosa ssp. speciosa
© 2003 Keir Morse
Clarkia speciosa ssp. speciosa
© 2020 Steve Laymon

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 parviflora ssp. parviflora    Narrow leaved miner's lettuce,  Streambank springbeauty,  Utah miner s lettuce
native
Annual herb

MONTIACEAE

Claytonia parviflora ssp. parviflora
© 2022 Ron Vanderhoff
Claytonia parviflora ssp. parviflora
© 2017 Gary McDonald
Claytonia parviflora ssp. parviflora
© 2017 Gary McDonald

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 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

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

CRASSULACEAE

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

Crassula 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

Crassula tillaea    Mediterranean pygmy weed,  Moss pygmyweed
non-native
Annual herb

CRASSULACEAE

Crassula tillaea
© 2019 Ron Vanderhoff
Crassula tillaea
© 2019 Ron Vanderhoff
Crassula tillaea
© 2019 Ron Vanderhoff

Croton setiger    Turkey-mullein
native
Annual herb

EUPHORBIACEAE

Croton setiger
© 2011 Steve Matson
Croton setiger
© 2011 Steve Matson
Croton setiger
© 2014 Richard Chasey

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 microstachys    Popcorn flower,  Tejon cryptantha
native
Annual herb

BORAGINACEAE

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

Cryptantha muricata var. jonesii    Jones' cryptantha
native
Annual herb

BORAGINACEAE

Cryptantha muricata var. jonesii
© 2019 Ron Vanderhoff
Cryptantha muricata var. jonesii
© 2019 Ron Vanderhoff
Cryptantha muricata var. jonesii
© 2019 Ron Vanderhoff

Cuscuta californica var. californica    California dodder,  Chaparral dodder,  Short flowered dodder
native
Annual herb, Vine (parasitic)

CONVOLVULACEAE

Cuscuta californica var. californica
© 2021 R.A. Chasey
Cuscuta californica var. californica
© 2021 Ron Vanderhoff
Cuscuta californica var. californica
© 2021 Ron Vanderhoff

Daucus pusillus    American wild carrot,  Rattlesnake weed
native
Annual herb

APIACEAE

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

Delphinium 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

Delphinium parryi ssp. parryi    Parry's larkspur,  San bernardino larkspur
native
Perennial herb

RANUNCULACEAE

Delphinium parryi ssp. parryi
© 2022 Mike Russler
Delphinium parryi ssp. parryi
© 2021 R.A. Chasey
Delphinium parryi ssp. parryi
© 2013 James Gonsman

Deschampsia danthonioides    Annual hairgrass
native
Annual grass

POACEAE

Deschampsia danthonioides
© 2003 Steve Matson
Deschampsia danthonioides
© 2003 Steve Matson
Deschampsia danthonioides
© 2018 Emily Allen

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

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

CYPERACEAE

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

Emmenanthe penduliflora var. penduliflora    Whispering bells,  Whisperingbells
native
Annual herb

HYDROPHYLLACEAE

Emmenanthe penduliflora var. penduliflora
© 2014 Steve Matson
Emmenanthe penduliflora var. penduliflora
© 2014 Steve Matson
Emmenanthe penduliflora var. penduliflora
© 2010 Steve Matson

Epilobium densiflorum    Dense boisduvalia,  Dense flowered boisduvalia,  Dense flowered spike primrose
native
Annual herb

ONAGRACEAE

Epilobium densiflorum
© 2009 BOB CASE
Epilobium densiflorum
© 2021 Mike Russler
Epilobium densiflorum
© 2020 Bob Sweatt

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

ASTERACEAE

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

Eriodictyon tomentosum    Woolly yerba santa
native
Shrub

NAMACEAE

Eriodictyon tomentosum
© 2021 Mike Russler
Eriodictyon tomentosum
© 2021 Mike Russler
Eriodictyon tomentosum
© 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 nudum var. pubiflorum    Hairy flowered buckwheat,  Naked buckwheat,  Fremont's Wild Buckwheat
native
Annual herb

POLYGONACEAE

Eriogonum nudum var. pubiflorum
© 2006 Steve Matson
Eriogonum nudum var. pubiflorum
© 2011 Steve Matson
Eriogonum nudum var. pubiflorum
© 2011 Steve Matson

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

ASTERACEAE

Eriophyllum confertiflorum var. confertiflorum
© 2024 Richard Spjut
Eriophyllum confertiflorum var. confertiflorum
© 2013 James Gonsman
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 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 guttata    Seep monkey flower,  Yellow monkey flower
native
Annual, Perennial herb (rhizomatous)

PHRYMACEAE

Erythranthe guttata
© 2019 Stacie Wolny
Erythranthe guttata
© 2015 James Gonsman
Erythranthe guttata
© 2019 Stacie Wolny

Erythranthe latidens    Broad toothed monkeyflower
native
Annual herb

PHRYMACEAE

Erythranthe latidens
© 2019 David Greenberger
Erythranthe latidens
© 2017 Amelia Ryan
Erythranthe latidens
© 2023 Ryan O'Dell

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 octoflora    Sixweeks grass
native
Annual grass

POACEAE

Festuca octoflora
© 2023 R.A. Chasey
Festuca octoflora
© 2020 Sara Timby
Festuca octoflora
© 2018 Ken Hickman

Galium andrewsii    Needlemat galium,  Phlox leaved bedstraw,  Phloxleaf bedstraw
native
Perennial herb

RUBIACEAE

Galium andrewsii
© 2022 Mike Russler
Galium andrewsii
© 2019 Marisa Persaud
Galium andrewsii
© 2022 Mike Russler

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

Gastridium phleoides    Nit grass
non-native
Annual grass

POACEAE

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

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

POLEMONIACEAE

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

Gilia clivorum    Many stemmed gilia,  Purple spot gilia,  Purplespot gilia
native
Annual herb

POLEMONIACEAE

Gilia clivorum
© 2013 Gary McDonald
Gilia clivorum
© 2013 Gary McDonald
Gilia clivorum
© 2021 Helen Hancock

Githopsis specularioides    Common bluecup,  Venus' looking glass
native
Annual herb

CAMPANULACEAE

Githopsis specularioides
© 2016 Steve Matson
Githopsis specularioides
© 2016 Steve Matson
Githopsis specularioides
© 2021 Mike Russler

Hesperomecon linearis    Narrowleaf queen poppy
native
Annual herb

PAPAVERACEAE

Hesperomecon linearis
© 2021 Mary Conway
Hesperomecon linearis
© 2021 Mary Conway
Hesperomecon linearis
© 2021 Karen Swift

Hooveria purpurea var. reducta    Camatta Canyon amole
native

AGAVACEAE

Hooveria purpurea var. reducta
© 2011 Jeffrey Hapeman

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

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

ASTERACEAE

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

Isoetes nuttallii    Nuttall's quillwort
native

ISOETACEAE

Isoetes nuttallii
© 2019 David Greenberger
Isoetes nuttallii
© 2019 Matt Berger
Isoetes nuttallii
© 2019 Matt Berger

Juncus luciensis    Santa lucia dwarf rush,  Santa lucia rush
rare native
Annual grasslike herb

JUNCACEAE

Juncus luciensis
© 2023 Matt Berger
Juncus luciensis
© 2023 Matt Berger
Juncus luciensis
© 2023 Matt Berger

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

Lasthenia gracilis    Needle goldfields
native
Annual herb

ASTERACEAE

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

Layia platyglossa    Coastal tidytips
native
Annual herb

ASTERACEAE

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

Lepechinia calycina    White pitcher sage,  Woodbalm, pitcher sage
native
Shrub

LAMIACEAE

Lepechinia calycina
© 2020 Janice Kuch
Lepechinia calycina
© 2024 Ben Spencer-Cooke
Lepechinia calycina
© 2023 Mike Russler

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

Lepidium strictum    Peppergrass,  Prostrate pepper grass,  Upright pepperweed
native
Annual herb

BRASSICACEAE

Lepidium strictum
© 2022 Ron Vanderhoff
Lepidium strictum
© 2022 Jim Xerogeanes
Lepidium strictum
© 2022 Ron Vanderhoff

Leptosiphon liniflorus    Narrowflower flaxflower
native
Annual herb

POLEMONIACEAE

Leptosiphon liniflorus
© 2017 Aaron Echols
Leptosiphon liniflorus
© 2022 Ron Vanderhoff
Leptosiphon liniflorus
© 2023 Diana Wahl

Leptosiphon parviflorus    Variable linanthus
native
Annual herb

POLEMONIACEAE

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

native
Annual herb

POLEMONIACEAE

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

native
Shrub

POLEMONIACEAE

Linanthus bigelovii ssp. johnsonii
© 2019 Steve Matson
Linanthus bigelovii ssp. johnsonii
© 2019 Steve Matson
Linanthus bigelovii ssp. johnsonii
© 2024 Ryan O'Dell

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

Logfia filaginoides    California cottonrose
native
Annual herb

ASTERACEAE

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

Logfia gallica    Narrowleaf cottonrose
non-native
Annual herb

ASTERACEAE

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

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

APIACEAE

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

Lomatium 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 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 nanus    Sky lupine
native
Annual herb

FABACEAE

Lupinus nanus
© 2016 Steve Matson
Lupinus nanus
© 2016 Steve Matson
Lupinus nanus
© 2016 Steve Matson

Madia exigua    Little tarweed,  Meager tarweed,  Small tarweed
native
Annual herb

ASTERACEAE

Madia exigua
© 2023 Dianne Lake
Madia exigua
© 2023 Ron Vanderhoff
Madia exigua
© 2021 Helen Hancock

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

ASTERACEAE

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

Malacothamnus jonesii    Jones's bushmallow
rare native
Shrub

MALVACEAE

Malacothamnus jonesii
© 2012 Terrence Gosliner
Malacothamnus jonesii
© 2017 Keir Morse
Malacothamnus jonesii
© 2017 Keir Morse

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

ASTERACEAE

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

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

Melica californica    California melicgrass
native
Perennial grass

POACEAE

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

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 acuminata    Needle microseris,  Sierra foothill silverpuffs,  Sierra foothills microseris
native
Annual herb

ASTERACEAE

Microseris acuminata
© 2018 Julie Kierstead Nelson
Microseris acuminata
© 2024 David popp
Microseris acuminata
© 2024 David popp

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

Microseris elegans    Elegant silverpuffs
native
Annual herb

ASTERACEAE

Microseris elegans
© 2011 Zoya Akulova
Microseris elegans
© 2024 Dianne Lake
Microseris elegans
© 2024 Dianne Lake

Mimetanthe pilosa    Snouted monkey flower
native
Annual herb

PHRYMACEAE

Mimetanthe pilosa
© 2017 Steve Matson
Mimetanthe pilosa
© 2017 Steve Matson
Mimetanthe pilosa
© 2017 Steve Matson

Muilla maritima    Common muilla,  Sea muilla
native
Perennial herb

THEMIDACEAE

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

Navarretia atractyloides    Holly leaf navarretia,  Hollyleaf pincushionplant
native
Annual herb

POLEMONIACEAE

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

Nemacladus secundiflorus var. secundiflorus    Large-flowered nemacladus
rare native
Annual herb

CAMPANULACEAE

Nemacladus secundiflorus var. secundiflorus
© 2008 Aaron Schusteff
Nemacladus secundiflorus var. secundiflorus
© 2008 Aaron Schusteff

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 penicillata    Sleeping combseed,  Winged comb seed,  Winged pectocarya
native
Annual herb

BORAGINACEAE

Pectocarya penicillata
© 2017 Ron Vanderhoff
Pectocarya penicillata
© 2017 Ron Vanderhoff
Pectocarya penicillata
© 2022 Steve Matson

Pellaea andromedifolia    Coffee cliffbrake,  Coffee fern
native
Fern

PTERIDACEAE

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

Pellaea mucronata var. mucronata    Bird's foot fern
native
Fern

PTERIDACEAE

Pellaea mucronata var. mucronata
© 2018 Rachelle Gray
Pellaea mucronata var. mucronata
© 2023 Helen Hancock
Pellaea mucronata var. mucronata
© 2023 Helen Hancock

Pentachaeta alsinoides    Tiny pygmy daisy,  Tiny pygmydaisy
native
Annual herb

ASTERACEAE

Pentachaeta alsinoides
© 2021 Ken Hickman
Pentachaeta alsinoides
© 2022 Ken Hickman
Pentachaeta alsinoides
© 2023 David Gowen

native
Fern

PTERIDACEAE

Pentagramma triangularis ssp. triangularis
© 2008 Steve Matson
Pentagramma triangularis ssp. triangularis
© 2008 Steve Matson
Pentagramma triangularis ssp. triangularis
© 2019 Gary McDonald

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

native
Shrub (parasitic)

VISCACEAE

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

Pinus sabiniana    Bull pine,  California foothill pine,  Gray pine
native
Tree

PINACEAE

Pinus sabiniana
© 2022 Cynthia Powell
Pinus sabiniana
© 2019 Cynthia Powell
Pinus sabiniana
© 2021 R.A. Chasey

Plagiobothrys acanthocarpus    Adobe allocarya,  Adobe popcornflower
native
Annual herb

BORAGINACEAE

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

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

BORAGINACEAE

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

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

BORAGINACEAE

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

Plagiobothrys shastensis    Shasta popcorn flower,  Shasta popcornflower
native
Annual herb

BORAGINACEAE

Plagiobothrys shastensis
© 2008 Steve Matson
Plagiobothrys shastensis
© 2008 Steve Matson
Plagiobothrys shastensis
© 2009 Julie A. Kierstead

Plagiobothrys tenellus    Pacific popcornflower,  Popcorn flower,  Slender popcorn flower
native
Annual herb

BORAGINACEAE

Plagiobothrys tenellus
© 2023 Larry Dizmang
Plagiobothrys tenellus
© 2023 Larry Dizmang
Plagiobothrys tenellus
© 2022 Mike Russler

Plagiobothrys trachycarpus    Rough fruited allocarya,  Roughfruit popcornflower
native
Annual herb

BORAGINACEAE

Plagiobothrys trachycarpus
© 2022 Catherine Chang
Plagiobothrys trachycarpus
© 2022 Catherine Chang
Plagiobothrys trachycarpus
© 2022 Catherine Chang

Plantago elongata    Annual coast plantago,  Coastal plantain,  Long leaf plantain
native
Annual herb

PLANTAGINACEAE

Plantago elongata
© 2017 Barbara Boethling
Plantago elongata
© 2019 Ron Vanderhoff
Plantago elongata
© 2020 Ron Vanderhoff

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

Plectritis ciliosa    Long spurred plectritis,  Longspur seablush
native
Annual herb

VALERIANACEAE

Plectritis ciliosa
© 2022 Steve Matson
Plectritis ciliosa
© 2005 Steve Matson
Plectritis ciliosa
© 2022 Steve Matson

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

POACEAE

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

Poa bulbosa ssp. vivipara    Bulbous blue grass
non-native
Perennial grass

POACEAE

Poa bulbosa ssp. vivipara
© 2024 R.A. Chasey
Poa bulbosa ssp. vivipara
© 2024 Bruce Homer-Smith
Poa bulbosa ssp. vivipara
© 2022 John Rawlings

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

Primula clevelandi    Small Tree-Mallow


native
Perennial herb

ASTERACEAE

Pseudognaphalium beneolens
© 2021 BLM Redding Field Office
Pseudognaphalium beneolens
© 2021 Mike Russler
Pseudognaphalium beneolens
© 2021 R.A. Chasey

Pseudognaphalium californicum    Ladies' tobacco
native
Annual, Perennial herb

ASTERACEAE

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

Pseudognaphalium luteoalbum    Jersey cudweed
non-native
Annual herb

ASTERACEAE

Pseudognaphalium luteoalbum
© 2021 Ron Vanderhoff
Pseudognaphalium luteoalbum
© 2019 Diane Etchison
Pseudognaphalium luteoalbum
© 2021 Ron Vanderhoff

Psilocarphus chilensis    Round woolly marbles
native
Annual herb

ASTERACEAE

Psilocarphus chilensis
© 2020 Dick Rawson
Psilocarphus chilensis
© 2020 Dick Rawson
Psilocarphus chilensis
© 2023 Toni Corelli

Psilocarphus tenellus    Slender woolly marbles,  Slender woollyheads
native
Annual herb

ASTERACEAE

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

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 xalvordiana    Alvord oak,  Alvord's oak
native
Tree

FAGACEAE

Quercus xalvordiana
© 2022 Ryan O'Dell
Quercus xalvordiana
© 2019 Richard Spjut
Quercus xalvordiana
© 2010 Neal Kramer

Rafinesquia californica    California chicory,  California plumseed
native
Annual herb

ASTERACEAE

Rafinesquia californica
© 2023 Robert Steers
Rafinesquia californica
© 2021 Ron Vanderhoff
Rafinesquia californica
© 2017 Steve Matson

Rhamnus ilicifolia    Evergreen buckthorn,  Hollyleaf redberry
native
Shrub

RHAMNACEAE

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

Rhus aromatica    Fragrant sumac,  Skunk Bush
native
Shrub

ANACARDIACEAE

Rhus aromatica
© 2018 Steve Matson
Rhus aromatica
© 2018 Steve Matson
Rhus aromatica
© 2018 Steve Matson

Rigiopappus leptocladus    Rigiopappus,  Wire weed,  Wireweed
native
Annual herb

ASTERACEAE

Rigiopappus leptocladus
© 2021 Steve Laymon
Rigiopappus leptocladus
© 2021 Steve Laymon
Rigiopappus leptocladus
© 2022 John Rawlings

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

POLYGONACEAE

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

Sabulina californica    California Sandwort
native
Annual herb

CARYOPHYLLACEAE

Sabulina californica
© 2021 Steve Matson
Sabulina californica
© 2021 Steve Matson
Sabulina californica
© 2021 David popp

Salix gooddingii    Goodding's black willow,  Goodding's willow,  Gooding's willow
native
Tree

SALICACEAE

Salix gooddingii
© 2020 Ron Vanderhoff
Salix gooddingii
© 2021 Richard Spjut
Salix gooddingii
© 2020 Ron Vanderhoff

Salix laevigata    Polished willow,  Red willow
native
Tree

SALICACEAE

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

Salix lasiolepis    Arroyo willow
native
Tree, Shrub

SALICACEAE

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

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

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

APIACEAE

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

Sanicula crassicaulis    Gamble weed,  Pacific blacksnakeroot,  Pacific sanicle
native
Perennial herb

APIACEAE

Sanicula crassicaulis
© 2023 Steve Conger
Sanicula crassicaulis
© 2023 Steve Conger
Sanicula crassicaulis
© 2021 Steve Laymon

Scribneria bolanderi    Scribner's grass,  Scribneria
native
Annual grass

POACEAE

Scribneria bolanderi
© 2022 John Rawlings
Scribneria bolanderi
© 2020 Ken Hickman
Scribneria bolanderi
© 2023 R.A. Chasey

Scutellaria tuberosa    Danny's skullcap,  Scullcap
native
Perennial herb

LAMIACEAE

Scutellaria tuberosa
© 2006 Steve Matson
Scutellaria tuberosa
© 2006 Steve Matson
Scutellaria tuberosa
© 2006 Steve Matson

Senecio aphanactis    California groundsel,  Chaparral ragwort,  Rayless ragwort
rare native
Annual herb

ASTERACEAE

Senecio aphanactis
© 2023 Matt Berger
Senecio aphanactis
© 2019 Matt Berger
Senecio aphanactis
© 2023 Matt Berger

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

ASTERACEAE

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

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

ASTERACEAE

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

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

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

ASTERACEAE

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

Stebbinsoseris heterocarpa    Grassland stebbinsoseris
native
Annual herb

ASTERACEAE

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

Stellaria pallida    Pale starwort
non-native
Annual herb

CARYOPHYLLACEAE

Stellaria pallida
© 2022 Donald Burk
Stellaria pallida
© 2004 Keir Morse
Stellaria pallida
© 2004 Keir Morse

Stipa cernua    Nodding needle grass
native
Perennial grass

POACEAE

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

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

ASTERACEAE

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

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

Toxicodendron diversilobum    Poison oak,  Poisonoak,  Western Poison Oak
native
Vine, Shrub

ANACARDIACEAE

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

Toxicoscordion brevibracteatum    Desert death camas
native
Perennial herb

MELANTHIACEAE

Toxicoscordion brevibracteatum
© 2024 Steve Matson
Toxicoscordion brevibracteatum
© 2024 Steve Matson
Toxicoscordion brevibracteatum
© 2024 Steve Matson

Toxicoscordion fremontii    Fremont's star lily,  Fremont's death camas
native
Perennial herb

MELANTHIACEAE

Toxicoscordion fremontii
© 2024 Carissa Brands
Toxicoscordion fremontii
© 2024 Mary Conway
Toxicoscordion fremontii
© 2024 Lynn Overtree

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 macraei    Chilean clover,  Macrae's clover
native
Annual herb

FABACEAE

Trifolium macraei
© 2009 Toni Corelli
Trifolium macraei
© 2022 R.A. Chasey
Trifolium macraei
© 2021 R.A. Chasey

Trifolium microcephalum    Hairy clover,  Small headed clover
native
Annual herb

FABACEAE

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

Triphysaria micrantha    Little butter 'n' eggs,  Purplebeak owl's clover
native
Annual herb

OROBANCHACEAE

Triphysaria micrantha
© 2006 Steve Matson
Triphysaria micrantha
© 2006 Steve Matson

Turricula parryi    Poodle-dog bush
native
Perennial herb

NAMACEAE

Turricula parryi
© 2019 Wendy Walker
Turricula parryi
© 2019 Bryant Baker
Turricula parryi
© 2019 Matt Berger

Typha domingensis    Narrowleaf cattail,  Southern cattail
native
Perennial herb

TYPHACEAE

Typha domingensis
© 2020 Ron Vanderhoff
Typha domingensis
© 2020 Ron Vanderhoff
Typha domingensis
© 2023 Ron Vanderhoff

Uropappus lindleyi    Silver puffs,  Uropappus
native
Annual herb

ASTERACEAE

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

Viola douglasii    Douglas' golden violet,  Douglas' violet
native
Perennial herb

VIOLACEAE

Viola douglasii
© 2006 Steve Matson
Viola douglasii
© 2006 Steve Matson
Viola douglasii
© 2006 Steve Matson

Viola purpurea ssp. quercetorum    Goosefoot violet,  Goosefoot yellow violet
native
Perennial herb

VIOLACEAE

Viola purpurea ssp. quercetorum
© 2016 Steve Matson
Viola purpurea ssp. quercetorum
© 2016 Steve Matson
Viola purpurea ssp. quercetorum
© 2016 Steve Matson

Yabea microcarpa    California hedge parsley,  False carrot
native
Annual herb

APIACEAE

Yabea microcarpa
© 2021 Helen Hancock
Yabea microcarpa
© 2022 R.A. Chasey
Yabea microcarpa
© 2012 Toni Corelli

Zeltnera davyi    Davy's centaury
native
Annual herb

GENTIANACEAE

Zeltnera davyi
© 2018 Mary Conway
Zeltnera davyi
© 2022 Irene Rosen
Zeltnera davyi
© 2023 R.A. Chasey