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|
Pennington Creek Biological Reserve
Pennington Creek Biological Reserve California Polytechnic State University San Luis Obispo County, California San Luis Obispo County |
|
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| David Keil / CNPS-SLO (2019-06-10) | ||||||
| 189 PLANTS |
|
Achillea millefolium Common yarrow
native
Perennial herb 
© 2022 Andy Ford 
© 2020 Bob Sweatt 
© 2018 Gary McDonald |
|
Acmispon brachycarpus hill lotus
native
Annual herb 
© 2023 R.A. Chasey 
© 2018 Steve Matson 
© 2018 Steve Matson |
|
Acmispon junceus var. biolettii Bioletti's rush lotus
native
Perennial herb 
© 2021 Toni Corelli 
© 2024 Robert Steers 
© 2021 Toni Corelli |
|
Acmispon junceus var. junceus Rush lotus
native
Perennial herb 
© 2016 John Doyen 
© 2016 John Doyen 
© 2016 John Doyen |
|
Acmispon strigosus Strigose lotus
native
Annual herb 
© 2024 Mike Russler 
© 2023 Ron Vanderhoff 
© 2016 Steve Matson |
|
native
Tree, Shrub 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2019 Steve Matson |
|
Adiantum jordanii Adiantum, maiden hair fern
native
Fern 
© 2022 BOB CASE 
© 2019 Ron Vanderhoff 
© 2023 Mike Russler |
|
Agoseris grandiflora var. grandiflora Giant mountain dandelion
native
Perennial herb 
© 2007 Gerald Carr 
© 2007 Gerald Carr 
© 2012 Michael Mitchell |
|
Allium haematochiton Red skinned onion, Redskin onion
native
Perennial herb (bulb) 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
|
Arctostaphylos obispoensis Bishop manzanita, Serpentine manzanita
• rare native
Shrub 
© 2019 Susan McDougall 
© 2021 Mike Russler 
© 2021 Mike Russler |
|
Artemisia californica California sagebrush, Coast sagebrush, Coastal sage brush
native
Shrub 
© 2018 James Gonsman 
© 2019 Aaron Echols 
© 2018 Ron Vanderhoff |
|
Artemisia douglasiana California mugwort, Douglas' sagewort
native
Perennial herb 
© 2022 Ron Vanderhoff 
© 2016 Glen Schneider 
© 2021 Mike Russler |
|
Astragalus curtipes Morro milkvetch, San luis obispo milkvetch, South coast milk vetch
native
Perennial herb 
© 2021 Joel A. Germond, Psy.D. 
© 2020 David Greenberger 
© 2020 David Greenberger |
|
Avena barbata Slender oat, Slim oat
• invasive non-native
Annual grass 
© 2018 Julian Geoghegan 
© 2023 David popp 
© 2019 Ron Vanderhoff |
|
Avena fatua Wild oat, Wildoat
• invasive non-native
Annual grass 
© 2018 Gary McDonald 
© 2023 Ron Vanderhoff 
© 2023 Matt Berger |
|
Baccharis pilularis Coyote brush, Dwarf chaparral broom
native
Shrub 
© 2022 Ryan O'Dell 
© 2021 Ron Vanderhoff: Staminate and pistillate plants in flower. 
© 2018 Cynthia Powell |
|
Blitum californicum Small Tree-Mallow
|
|
Bloomeria crocea var. crocea Common goldenstar
native
Perennial herb 
© 2019 Michael Mitchell 
© 2019 Ron Vanderhoff 
© 2017 Aaron Echols |
|
Brachypodium hybridum Small Tree-Mallow
|
|
Brassica nigra Black mustard
• invasive non-native
Annual herb 
© 2021 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Bromus carinatus var. marginatus Mountain brome
native
Perennial grass 
© 2021 Arlee Montalvo 
© 2019 John Rawlings 
© 2021 Arlee Montalvo |
|
Bromus diandrus Bromegrass, Ripgut brome, Ripgut grass
• invasive non-native
Annual grass 
© Alize 
© 2021 Richard Spjut 
© 2024 David popp |
|
Bromus hordeaceus Soft brome, Soft chess
• invasive non-native
Annual grass 
© 2023 Ron Vanderhoff 
© 2018 Gary McDonald 
© 2018 Gary McDonald |
|
Bromus rubens Red brome
• invasive non-native
Annual grass 
© 2015 Chris Jaster 
© 2015 jamie smith 
© 2018 Gary McDonald |
|
Calandrinia menziesii red maids, Calandrinia
native
Annual herb 
© 2021 Mary Ann Machi 
© 2024 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Calochortus clavatus var. clavatus Club haired mariposa lily, Clubhair mariposa lily
• rare native
Perennial herb (bulb) 
© 2020 David Wolfson 
© 2020 David Krause 
© 2023 Mike Russler |
|
Calochortus obispoensis San luis mariposa lily
• rare native
Perennial herb (bulb) 
© 2023 Morgan Stickrod 
© 2023 Mike Russler 
© 2022 Dee Shea Himes |
|
Calystegia macrostegia ssp. cyclostegia Coast morning glory, Island false bindweed
native
Perennial herb, Vine 
© 2017 Michael Mitchell 
© 2020 James Gonsman 
© 2017 Michael Mitchell |
|
Calystegia subacaulis ssp. episcopalis Cambria morning glory, San luis obispo county morning glory
• rare native
Perennial herb (rhizomatous) 
© 2019 David Greenberger 
© 2021 Kristen Nelson  © 2011 Aaron E. Sims |
|
Cardamine californica California toothwort, milkmaids
native
Perennial herb 
© 2020 Barbara Peck 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Carduus pycnocephalus Italian thistle
• invasive non-native
Annual herb 
© 2019 Gary McDonald 
© 2023 Diana Wahl 
© 2023 Ron Vanderhoff |
|
Carex serratodens Bifid sedge, Two tooth sedge
native
Perennial grasslike herb 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2021 Cynthia Powell |
|
Carex spissa San diego sedge
native
Perennial grasslike herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Castilleja affinis ssp. affinis Coast indian paintbrush
native
Perennial herb 
© 2006 Steve Matson 
© 2006 Steve Matson 
© 2019 Ron Vanderhoff |
|
Castilleja minor ssp. spiralis Lesser indian paintbrush, Lesser paintbrush
native
Annual herb 
© 2023 Rhonda Allen 
© 2019 Ron Vanderhoff 
© 2019 Matt Berger |
|
Ceanothus cuneatus var. fascicularis Sand buck brush, Sedgeleaf buckbrush
• rare native
Shrub 
© 2024 Mike Russler 
© 2022 Cynthia Powell 
© 2019 Bryant Baker |
|
Ceanothus spinosus Greenbark ceanothus, Redheart
native
Tree, Shrub 
© 2018 Ron Vanderhoff 
© 2012 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Centaurea melitensis Maltese star thistle, Napa star thistle, Tocalote
• invasive non-native
Annual herb 
© 2019 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Laura Anna Arellano |
|
Chlorogalum pomeridianum var. pomeridianum Common soaproot, Wavyleaf soap plant
native
Perennial herb 
© 2021 Sue Graue 
© 2015 Sharon King & Randy Aeschliman 
© 2023 Ron Vanderhoff |
|
Chorizanthe breweri Brewer's spineflower, San luis obispo spineflower
• rare native
Annual herb 
© 2020 David Greenberger 
© 2020 David Greenberger 
© 2023 Mike Russler |
|
Cirsium fontinale var. obispoense Chorro creek bog thistle
• rare native
Perennial herb 
© 2017 Cindy Roessler 
© 2015 David Wolfson 
© 2020 David Greenberger |
|
Clarkia bottae Botta's clarkia, Punch bowl godetia
native
Annual herb 
© 2023 Ron Vanderhoff 
© 2020 Steve Laymon 
© 2020 Steve Laymon |
|
Claytonia perfoliata ssp. perfoliata Claytonia, Miner's lettuce
native
Annual herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2008 Steve Matson |
|
Conium maculatum Poison hemlock
• invasive non-native
Perennial herb 
© 2024 Cynthia Powell 
© 2013 Toni Corelli 
© 2016 Cynthia Powell |
|
Cornus sericea ssp. occidentalis Western dogwood
native
Shrub 
© 2019 David Greenberger 
© 2018 Lynn Overtree 
© 2020 Susan McDougall |
|
Crassula connata Pigmy weed, Sand pygmy weed, Sand pygmyweed
native
Annual herb 
© 2019 Ron Vanderhoff 
© 2022 Sameer Saroa 
© 2019 Adam Chasey |
|
Croton setiger Turkey-mullein
native
Annual herb 
© 2011 Steve Matson 
© 2011 Steve Matson 
© 2014 Richard Chasey |
|
Cryptantha clevelandii var. florosa Coastal cryptantha
native
Annual herb 
© 2020 David Greenberger 
© 2024 Ron Vanderhoff 
© 2023 Ken-ichi Ueda |
|
Delphinium parryi ssp. blochmaniae Blochman's larkspur, Dune larkspur
• rare native
Perennial herb 
© Geoff Burleigh 
© Geoff Burleigh 
© Geoff Burleigh |
|
Dendromecon rigida Bush poppy, Tree poppy
native
Shrub 
© 2024 Mike Russler 
© 2024 Mike Russler 
© 2020 Ron Vanderhoff |
|
Diplacus aurantiacus var. aurantiacus Orange Bush Monkeyflower
native
Shrub 
© 2024 Steve Conger 
© 2024 Steve Conger 
© 2019 Mary Gerbic |
|
Dipterostemon capitatus ssp. capitatus Blue dicks
native
Perennial herb 
© 2008 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Dudleya abramsii ssp. murina San Luis Obispo dudleya
• rare native
Perennial herb 
© 2023 Mike Russler 
© 2023 Mike Russler 
© 2023 Mike Russler |
|
Dudleya lanceolata Lanceleaf liveforever, Southern california dudleya
native
Perennial herb 
© 2019 Ron Vanderhoff 
© 2020 Steven M Norris 
© 2020 Steven M Norris |
|
Elymus condensatus Giant wild rye
native
Perennial grass 
© 2020 Ron Vanderhoff 
© 2024 Mel Letterman 
© 2020 Diane Etchison |
|
Elymus glaucus ssp. glaucus Blue wild rye, Blue wildrye, Western rye grass
native
Perennial grass 
© 2023 R.A. Chasey 
© 2021 Arlee Montalvo 
© 2022 Ron Vanderhoff |
|
Epilobium canum ssp. canum California fuchsia, Hummingbird trumpet
native
Perennial herb 
© 2023 Ron Vanderhoff 
© 2024 R.A. Chasey 
© 2022 Ron Vanderhoff |
|
Epilobium ciliatum ssp. ciliatum Fringed willowherb, Northern willow herb, Willow herb
native
Perennial herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Erigeron foliosus var. foliosus Leafy fleabane, Thread stemmed fleabane
native
Perennial herb, Shrub 
© 2023 Ron Vanderhoff 
© 2024 Mike Russler 
© 2022 Ron Vanderhoff |
|
Eriogonum elongatum var. elongatum Long stemmed buckwheat
native
Perennial herb 
© 2017 Ron Vanderhoff 
© 2019 Aaron Echols 
© 2021 Mike Russler |
|
Eriogonum parvifolium Dune eriogonum, Sea cliff buckwheat, Seacliff buckwheat
native
Shrub 
© 2022 Mary Conway 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Eriophyllum confertiflorum var. confertiflorum Golden yarrow, Yellow yarrow
native
Shrub 
© 2023 Ryan O'Dell 
© 2013 James Gonsman 
© 2020 Ron Vanderhoff |
|
Erodium botrys Big heron bill, Broad leaf filaree, Long beaked filaree
non-native
Annual herb 
© 2006 Steve Matson 
© 2006 Steve Matson 
© 2006 Steve Matson |
|
Erodium cicutarium Coastal heron's bill, Red stemmed filaree, Redstem stork's bill
• invasive non-native
Annual herb 
© 2022 Steve Matson 
© 2008 Steve Matson 
© 2022 Steve Matson |
|
Erodium moschatum Musky stork's bill, White stemmed filaree, Whitestem filaree
• invasive non-native
Annual herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Erythranthe guttata Seep monkey flower, Yellow monkey flower
native
Annual, Perennial herb (rhizomatous) 
© 2019 Stacie Wolny 
© 2015 James Gonsman 
© 2019 Stacie Wolny |
|
Eschscholzia californica California poppy
native
Annual, Perennial herb 
© 2019 Dee Shea Himes 
© 2021 Ron Vanderhoff 
© 2019 Amy Rapport |
|
Eucrypta chrysanthemifolia var. chrysanthemifolia Common eucrypta, Spotted hideseed
native
Annual herb 
© 2024 Mike Russler 
© 2023 Ron Vanderhoff 
© 2024 Mike Russler |
|
Euphorbia spathulata Reticulate seeded spurge, Warty spurge
native
Annual herb 
© 2008 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Festuca bromoides Brome fescue
non-native
Annual grass 
© 2022 Diana Wahl 
© 2021 Toni Corelli 
© 2021 David popp |
|
Festuca microstachys Small fescue
native
Annual grass 
© 2011 Steve Matson 
© 2024 Emily R. Allen 
© 2011 Steve Matson |
|
Festuca perennis Italian rye grass
• invasive non-native
Annual, Perennial grass 
© 2019 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Frangula californica ssp. californica California coffeeberry
native
Shrub 
© 2015 Steve Matson 
© 2015 Steve Matson 
© 2019 Ron Vanderhoff |
|
Fremontodendron californicum California flannelbush, California fremontia, Flannel bush
native
Shrub 
© 2020 Suzanne L. Weakley 
© 2019 Diane Etchison 
© 2021 Mike Russler |
|
Fritillaria biflora var. biflora Chocolate lily
native
Perennial herb (bulb) 
© 2006 Steve Matson 
© 2006 Steve Matson 
© 2006 Steve Matson |
|
Galium angustifolium ssp. angustifolium Narrow leaved bedstraw, Narrowleaf bedstraw
native
Perennial herb 
© 2017 Steve Matson 
© 2020 Ron Vanderhoff 
© 2017 Steve Matson |
|
Galium aparine Cleavers, Common bedstraw, Goose grass
native
Annual herb 
© 2020 Ron Vanderhoff 
© 2023 Julia Markey 
© 2020 Ron Vanderhoff |
|
Galium californicum ssp. flaccidum California bedstraw
native
Perennial herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Galium porrigens var. porrigens Climbing bedstraw, Graceful bedstraw, Oval leaved bedstraw
native
Vine, Shrub 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2022 Julia Larke |
|
Geranium dissectum Cranesbill, Cut leaved geranium, Cutleaf geranium
• invasive non-native
Annual herb 
© 2021 Al Keuter 
© 2024 Mike Russler 
© 2014 Bryan Derr |
|
Gilia achilleifolia ssp. achilleifolia California gilia
native
Annual herb 
© 2021 Helen Hancock 
© 2022 R.A. Chasey 
© 2021 Mary Conway |
|
Hazardia squarrosa var. squarrosa Saw toothed goldenbush, Sawtooth goldenbush
native
Shrub 
© 2024 Mike Russler 
© 2024 Mike Russler 
© 2021 Mary Conway |
|
Helenium bigelovii Bigelow's sneezeweed, Sneezeweed
native
Perennial herb 
© 2022 R.A. Chasey 
© 2019 Bryant Baker 
© 2020 Rebecca Schoenenberger |
|
Hemizonia congesta ssp. luzulifolia Hayfield tarweed, Woodrush tarweed
native
Annual herb 
© 2013 Arcangelo Wessells 
© 2022 R.A. Chasey 
© 2022 R.A. Chasey |
|
Hesperevax sparsiflora var. sparsiflora Erect dwarf cudweed, Few flowered evax
native
Annual herb 
© 2020 Stacie Wolny 
© 2020 R.A. Chasey 
© 2022 R.A. Chasey |
|
Hesperocyparis sargentii Sargent cypress
native
Tree, Shrub 
© 2021 Bryant Baker 
© 2021 R.A. Chasey 
© 2021 Bryant Baker |
|
Hesperolinon micranthum Common dwarf flax, Small flower western flax, Small flowered dwarf flax
native
Annual herb 
© 2024 Mike Russler 
© 2024 Mike Russler 
© 2021 R.A. Chasey |
|
Hesperoyucca whipplei Chaparral yucca
native
Shrub 
© Geoff Burleigh 
© 2020 Julia Markey 
© 2020 Matt Berger |
|
Heteromeles arbutifolia Christmas berry, Toyon
native
Shrub 
© 2015 James Gonsman 
© 2017 Gary McDonald 
© 2022 John Doyen |
|
Holodiscus discolor Cream bush, Ocean spray, Oceanspray
native
Shrub 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2022 Steve Matson |
|
Hordeum marinum Seaside barley
• invasive non-native
Annual grass 
© 2023 Ron Vanderhoff 
© 2017 Julia Dorosh 
© 2023 R.A. Chasey |
|
Hordeum murinum ssp. leporinum Farmer's foxtail, Foxtail barley, Hare barley
non-native
Annual grass 
© 2022 Ron Vanderhoff 
© 2021 Al Keuter 
© 2021 Ron Vanderhoff |
|
Hypochaeris glabra Smooth cat's ear
• invasive non-native
Annual herb 
© 2020 Ron Vanderhoff 
© 2017 Gary McDonald 
© 2019 Ron Vanderhoff |
|
Juncus balticus ssp. ater Baltic rush
native
Perennial grasslike herb 
© 2015 Steve Matson 
© 2015 Steve Matson 
© 2023 Ron Vanderhoff |
|
Juncus xiphioides Iris leaved rush, Irisleaf rush
native
Perennial grasslike herb 
© 2016 Erik Larsen 
© 2017 Ron Vanderhoff 
© 2023 R.A. Chasey |
|
Koeleria macrantha June grass, Prairie junegrass
native
Perennial grass 
© 2015 Steve Matson 
© 2015 Steve Matson 
© 2015 Steve Matson |
|
Lactuca saligna Narrow leaved wild lettuce, Willow lettuce, Willowleaf lettuce
non-native
Annual herb 
© 2021 Don Hollander 
© 2019 Stacie Wolny 
© 2021 Don Hollander |
|
Lactuca serriola Prickly lettuce, Prickly wild lettuce
• invasive non-native
Annual herb 
© 2017 Gary McDonald 
© 2017 Gary McDonald 
© 2017 Gary McDonald |
|
Lasthenia californica ssp. macrantha Perennial goldfields
• rare native
Perennial herb 
© 2023 Mary Ann Machi 
© 2022 R.A. Chasey 
© 2017 David Greenberger |
|
Lathyrus vestitus var. vestitus Common pacific pea, Hillside pea, Wild sweetpea
native
Perennial herb 
© 2023 Steve Conger 
© 2022 Charles Russell 
© 2024 Ron Vanderhoff |
|
Lepidium nitidum Peppergrass, Shining pepper grass, Shining pepperweed
native
Annual herb 
© 2021 Steve Matson 
© 2016 Steve Matson  © 2025 Jason Flores |
|
Lithophragma heterophyllum Hill star, Hillside woodland star
native
Perennial herb 
© 2019 David Greenberger 
© 2024 Suzanne L. Weakley 
© 2019 Mary Conway |
|
Logfia filaginoides California cottonrose
native
Annual herb 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2019 Steve Matson |
|
Lomatium dasycarpum ssp. dasycarpum Woolly fruited lomatium, Woollyfruit desertparsley
native
Perennial herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Lomatium parvifolium Coastal biscuitroot, Small leaved lomatium
• rare native
Perennial herb 
© 2020 David Greenberger 
© 2023 Mike Russler 
© 2021 Patrick Furtado |
|
Lomatium utriculatum Bladder parsnip, Common lomatium, Hog fennel
native
Perennial herb 
© 2006 Steve Matson 
© 2006 Steve Matson 
© 2015 James Gonsman |
|
Lonicera hispidula Pink honeysuckle
native
Vine, Shrub 
© 2022 Suzanne L. Weakley 
© 2021 Cara Wilcox 
© 2018 Diana Wahl |
|
Lupinus albifrons var. collinus Silver bush lupine, Silver lupine, low growing silver lupine
native
Shrub 
© 2020 Hunter Breck 
© 2021 Mike Russler 
© 2016 Steve Matson |
|
Lupinus succulentus Arroyo lupine, Hollowleaf annual lupine, Succulent lupine
native
Annual herb 
© 2023 Andy Ford 
© 2018 Stacie Wolny 
© 2018 Stacie Wolny |
|
Lysimachia arvensis Scarlet pimpernel
non-native
Annual herb 
© 2017 B.J. Dion 
© 2018 Stacie Wolny 
© 2017 B.J. Dion |
|
Marah fabacea California man-root
native
Perennial herb, Vine 
© 2018 Gary McDonald 
© 2018 MCOSD EDRR 
© 2021 Cyril Guyot |
|
Medicago polymorpha Bur clover, Bur medic, California burclover
• invasive non-native
Annual herb 
© 2019 Gary McDonald 
© 2019 Gary McDonald 
© 2019 Gary McDonald |
|
Melica californica California melicgrass
native
Perennial grass 
© 2023 John Rawlings 
© 2021 John Rawlings 
© 2022 John Rawlings |
|
Melica imperfecta California melic, Coast range melic, Small flowered melica
native
Perennial grass 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Melilotus albus White sweetclover
• invasive non-native
Annual, Biennial herb 
© 2021 Ron Vanderhoff 
© 2020 Bob Sweatt 
© 2022 Ron Vanderhoff |
|
Microseris douglasii ssp. tenella Douglas' silverpuffs, Short scaled microseris
native
Annual herb 
© 2025 Mike Russler 
© 2025 Mike Russler 
© 2022 Helen Hancock |
|
Olea europaea Olive
• invasive non-native
Tree, Shrub 
© 2022 Donald Burk 
© 2021 Thomas Reyes 
© 2022 Ron Vanderhoff |
|
Opuntia ficus-indica Mission cactus, Tuna cactus
non-native
Shrub (stem succulent) 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Paeonia californica California peony
native
Perennial herb 
© 2024 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2019 Susan McDougall |
|
Pellaea andromedifolia Coffee cliffbrake, Coffee fern
native
Fern 
© 2023 Steve Conger 
© 2021 Steve Matson 
© 2021 Mike Russler |
|
Pentagramma triangularis ssp. triangularis Gold back fern
native
Fern 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2019 Gary McDonald |
|
Phacelia imbricata ssp. imbricata Imbricate Phacelia
native
Annual herb 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2019 Steve Matson |
|
Phacelia viscida var. viscida Sticky phacelia
native
Annual herb 
© 2024 Mike Russler 
© 2024 Mike Russler 
© 2024 Mike Russler |
|
Pinus sabiniana Bull pine, California foothill pine, Gray pine
native
Tree 
© 2022 Cynthia Powell 
© 2019 Cynthia Powell 
© 2021 R.A. Chasey |
|
Plantago erecta California plantain, Dotseed plantain, Foothill plantain
native
Annual herb 
© 2008 Steve Matson 
© 2022 Steve Matson 
© 2022 Steve Matson |
|
Plantago lanceolata English plantain, Narrow leaved plantain, Ribgrass
• invasive non-native
Perennial herb 
© 2008 Steve Matson 
© 2019 Joe Engelbrecht 
© 2021 Ken Lunders |
|
Platanus racemosa California sycamore, Western sycamore
native
Tree 
© 2021 Ron Vanderhoff 
© 2018 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Platystemon californicus Cream cups, Creamcups
native
Annual herb 
© 2017 Nathanial Wigington 
© 2022 John L. Thompson 
© 2022 John L. Thompson |
|
Poa secunda ssp. secunda One sided blue grass, Pine bluegrass, Sandberg's bluegrass
native
Perennial grass 
© 2018 Ron Vanderhoff 
© 2018 Ron Vanderhoff 
© 2018 Ron Vanderhoff |
|
Polypodium californicum California polypody
native
Fern 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2023 Keir Morse |
|
Polypogon monspeliensis Annual beard grass, Rabbitsfoot grass
• invasive non-native
Annual grass 
© 2008 Steve Matson 
© 2014 Steve Matson 
© 2008 Steve Matson |
|
Primula clevelandi Small Tree-Mallow
|
|
Pseudognaphalium californicum Ladies' tobacco
native
Annual, Perennial herb 
© 2019 Gary McDonald 
© 2020 Steven M Norris 
© 2021 Ron Vanderhoff |
|
Pterostegia drymarioides Fairy mist, Woodland threadstem
native
Annual herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2005 Steve Matson |
|
Quercus agrifolia var. agrifolia California live oak, Coast live oak
native
Tree 
© 2023 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2021 Al Keuter |
|
Quercus durata var. durata Leather oak
native
Shrub 
© 2022 Ryan O'Dell 
© 2020 Charles Russell  © 2023 Emma Shelton |
|
Rafinesquia californica California chicory, California plumseed
native
Annual herb 
© 2023 Robert Steers 
© 2021 Ron Vanderhoff 
© 2017 Steve Matson |
|
Ranunculus californicus California buttercup
native
Perennial herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Rhamnus crocea Redberry buckthorn
native
Shrub 
© 2011 Michael Mitchell 
© 2022 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Ribes speciosum Fuchsia flowered gooseberry, Fuchsiaflower gooseberry
native
Shrub 
© 2022 David Chipping 
© 2024 Shelly Marshall 
© 2021 Ron Vanderhoff |
|
Rosa spithamea Ground rose, Sonoma rose
native
Shrub 
© 2021 David Gowen  © Silverado Jim 
© 2020 David Krause |
|
Rubus ursinus California blackberry, Pacific blackberry
native
Vine, Shrub 
© 2018 Ken Lunders 
© 2019 Ron Vanderhoff 
© 2015 Kelli Kallenborn |
|
Rumex pulcher Fiddle dock
non-native
Perennial herb 
© 2020 Ryan Carle 
© 2022 Chris McDonald 
© 2021 David popp |
|
Sabulina douglasii Douglas' Stitchwort
native
Annual herb 
© 2022 Steve Matson 
© 2019 Stacie Wolny 
© 2021 R.A. Chasey |
|
Salix breweri Brewer's willow, Serpentine willow
native
Shrub 
© 2022 Ryan O'Dell 
© 2024 Ryan O'Dell 
© 2021 R.A. Chasey |
|
Salix lasiolepis Arroyo willow
native
Tree, Shrub 
© 2019 Steve Matson 
© 2022 Ron Vanderhoff 
© 2020 Steve Matson |
|
Salvia columbariae Chia sage
native
Annual herb 
© 2020 Ron Vanderhoff 
© 2022 Mike Russler 
© 2022 Mike Russler |
|
Salvia mellifera Black sage
native
Shrub 
© 2017 Steve Matson 
© 2022 Suzanne L. Weakley 
© 2019 Diane Etchison |
|
Salvia spathacea Hummingbird sage
native
Perennial herb 
© 2020 David Wolfson 
© 2020 Abby Nichols 
© 2020 Bryant Baker |
|
Sambucus nigra ssp. caerulea Blue elderberry
native
Tree, Shrub 
© 2021 Mike Russler 
© 2020 Diane Etchison 
© 2022 El Byrne |
|
Sanicula arguta Sharp toothed sanicle, Sharp toothed snakeroot, Sharptooth blacksnakeroot
native
Perennial herb 
© 2006 Steve Matson 
© 2006 Steve Matson 
© 2006 Steve Matson |
|
Sanicula bipinnatifida Purple sanicle, Snakeroot, Purple Sanicle, Shoe Buttons
native
Perennial herb 
© 2019 Diane Etchison 
© 2018 Gary McDonald 
© 2021 Robin Carter |
|
Sanicula hoffmannii Hoffmann's blacksnakeroot, Hoffmann's sanicle, Hoffmann's snakeroot
• rare native
Perennial herb 
© 2019 Ken Hickman 
© 2015 David Wolfson 
© 2024 Kyle Suchy |
|
Senecio vulgaris Common groundsel, Old man in the spring, Old man of spring
non-native
Annual herb 
© 2017 Barbara Boethling 
© 2023 Ron Vanderhoff 
© 2021 Toni Corelli |
|
Sidalcea malviflora ssp. laciniata Dwarf checkerbloom, Laciniate checker mallow
native
Perennial herb (rhizomatous) 
© 2024 Mike Russler 
© 2021 Maria Stokes 
© 2024 Mike Russler |
|
Silene antirrhina Sleepy catch fly, Sleepy catchfly, Sleepy silene
native
Annual herb 
© 2019 Ken Hickman 
© 2019 Ken Hickman 
© 2023 Matt Berger |
|
Silene gallica Common catchfly, Windmill pink
non-native
Annual herb 
© 2019 Mary Wloch 
© 2017 Gary McDonald 
© 2019 Gary McDonald |
|
Silybum marianum Blessed milkthistle, Milk thistle
• invasive non-native
Annual, Perennial herb 
© 2020 Nancy Hamlett 
© 2019 Marisa Persaud 
© 2018 Angelique Herman |
|
Sisyrinchium bellum Western blue eyed grass
native
Perennial herb 
© 2024 Steve Conger 
© 2024 Ron Vanderhoff 
© 2019 Stacie Wolny |
|
Solanum douglasii Douglas' nightshade, Greenspot nightshade
native
Perennial herb 
© 2006 Steve Matson 
© 2024 Mike Russler 
© 2006 Steve Matson |
|
Solanum umbelliferum var. xanti Blue witch nightshade, Bluewitch nightshade
native
Shrub 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Solidago velutina ssp. californica California goldenrod, Oreja de liebre
native
Perennial herb 
© 2013 Steve Matson 
© 2008 Steve Matson 
© 2008 Steve Matson |
|
Sonchus asper ssp. asper Prickly sow thistle, Sow thistle
• invasive non-native
Annual herb 
© 2014 Gary McDonald 
© 2022 Ron Vanderhoff 
© 2014 Gary McDonald |
|
Sonchus oleraceus Common sow thistle, Common sowthistle, Sow thistle
non-native
Annual herb 
© 2019 Diane Etchison 
© 2015 Jesse Rorabaugh 
© 2024 Ron Vanderhoff |
|
Stachys bullata California hedge nettle, California hedgenettle, Southern hedge nettle
native
Perennial herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Stachys pycnantha Short spike hedge nettle, Shortspike hedgenettle
native
Perennial herb 
© 2023 David Wolfson 
© 2019 David Wolfson 
© 2021 Dan Quinn |
|
Stebbinsoseris heterocarpa Grassland stebbinsoseris
native
Annual herb 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2017 Diane Etchison |
|
Stellaria media Chickweed
non-native
Annual herb 
© 2018 Gary McDonald 
© 2018 Gary McDonald 
© 2015 Diane Etchison |
|
Stellaria pallida Pale starwort
non-native
Annual herb 
© 2022 Donald Burk 
© 2004 Keir Morse 
© 2004 Keir Morse |
|
Stephanomeria cichoriacea Chicory leaved stephanomeria, Chicoryleaf wirelettuce, Fort tejon milk aster
native
Perennial herb 
© 2019 David Greenberger 
© 2012 Ron Vanderhoff 
© 2018 John Game |
|
Stephanomeria exigua ssp. carotifera White plume stephanomeria, Whiteplume wirelettuce
native
Perennial herb 
© 2018 Mary Conway 
© 2018 Mary Conway 
© 2018 Mary Conway |
|
Stipa lepida Foothill needle grass
native
Perennial grass 
© 2017 Gary McDonald 
© 2023 Ron Vanderhoff 
© 2024 Mel Letterman |
|
Stipa pulchra Purple needle grass
native
Perennial grass 
© 2019 Michelle Karle 
© 2008 Zoya Akulova 
© 2019 Ron Vanderhoff |
|
Streptanthus lasiophyllus Small Tree-Mallow
|
|
Symphoricarpos mollis Creeping snowberry, Trailing snowberry
native
Shrub 
© 2022 Dana York 
© 2020 Cara Wilcox 
© 2019 Ron Vanderhoff |
|
Symphyotrichum chilense California aster, Pacific aster
native
Perennial herb 
© 2020 Suzanne L. Weakley 
© 2013 Arcangelo Wessells 
© 2018 Stacie Wolny |
|
Thermopsis californica var. californica California goldenbanner
native
Perennial herb (rhizomatous) 
© 2021 Mike Russler 
© 2015 James Gonsman 
© 2021 Mike Russler |
|
Thysanocarpus laciniatus Common lace pod, Mountain fringepod, Narrow leaved fringe pod
native
Annual herb 
© 2021 Helen Hancock 
© 2023 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
|
Torilis nodosa Hedge parsley, Knotted hedge parsley, Knotted hedgeparsley
non-native
Annual herb 
© 2011 Steve Matson 
© 2011 Steve Matson 
© 2011 Steve Matson |
|
Toxicodendron diversilobum Poison oak, Poisonoak, Western Poison Oak
native
Vine, Shrub 
© 2020 Ron Vanderhoff 
© 2019 Randy Huey 
© 2025 Mike Russler |
|
Toxicoscordion fremontii Fremont's star lily, Fremont's death camas
native
Perennial herb 
© 2024 Carissa Brands 
© 2024 Mary Conway 
© 2021 Kristen Nelson |
|
Trifolium bifidum var. decipiens Notch leaf clover
native
Annual herb 
© 2022 R.A. Chasey 
© 2024 R.A. Chasey 
© 2021 Cameron Chabre |
|
Trifolium fucatum Bull clover, Sour clover
native
Annual herb 
© 2014 Steve Matson 
© 2024 Mike Russler 
© 2025 Mike Russler |
|
Trifolium gracilentum Graceful clover, Pin point clover, Pinpoint clover
native
Annual herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Triphysaria pusilla Dwarf owl's clover, Little owl's clover
native
Annual herb 
© 2018 Steve Matson 
© 2018 Steve Matson 
© 2018 Steve Matson |
|
Umbellularia californica Bay laurel, California bay, California laurel, bay tree
native
Tree 
© 2023 Mary Ann Machi 
© 2016 Steve Matson 
© 2023 Mary Ann Machi |
|
Uropappus lindleyi Silver puffs, Uropappus
native
Annual herb 
© 2019 Zack Abbey 
© 2019 Ron Vanderhoff 
© 2016 Ron Vanderhoff |
|
Vicia sativa ssp. sativa Garden vetch, Pubescent common vetch, Spring vetch
non-native
Annual herb, Vine 
© 2024 Mike Russler 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Viola pedunculata California golden violet, Johnny jump up
native
Perennial herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |