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Islay Hill Open Space
Islay Hill Open Space. San Luis Obispo, California San Luis Obispo County |
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| David Keil / CNPS-SLO (2019-06-07) | ||||||
| 175 PLANTS |
|
Achillea millefolium Common yarrow
native
Perennial herb 
© 2022 Andy Ford 
© 2020 Bob Sweatt 
© 2018 Gary McDonald |
|
Achyrachaena mollis Blow-Wives
native
Annual herb 
© 2015 Diane Etchison 
© 2022 Mike Russler 
© 2022 Mike Russler |
|
Acmispon brachycarpus hill lotus
native
Annual herb 
© 2005 Steve Matson 
© 2005 Steve Matson 
© 2018 Steve Matson |
|
Acmispon glaber var. glaber Deerweed
native
Perennial herb 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Acmispon strigosus Strigose lotus
native
Annual herb 
© 2016 Steve Matson 
© 2009 Steve Matson 
© 2016 Steve Matson |
|
Acourtia microcephala Sacapellote
native
Perennial herb 
© 2022 Diane Etchison 
© 2019 Ron Vanderhoff 
© 2021 Aaron Echols |
|
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 |
|
Amaranthus blitoides Mat amaranth, Prostrate amaranth, Prostrate pigweed
native
Annual herb 
© 2020 Ron Vanderhoff 
© 2023 Helen Hancock 
© 2024 Dianne Lake |
|
Amsinckia menziesii Menzies' fiddleneck, Small flowered fiddleneck
native
Annual herb 
© 2020 Ron Vanderhoff 
© 2018 Gary McDonald 
© 2018 Gary McDonald |
|
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 |
|
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 |
|
Brassica rapa Common mustard, Field mustard, Rape mustard
• invasive non-native
Annual herb 
© 2024 David Wolfson 
© 2021 Diane Etchison 
© 2018 Angelique Herman |
|
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 madritensis Foxtail chess, foxtail brome, Madrid brome, Spanish brome
non-native
Annual grass 
© 2022 Steve Matson 
© 2023 Stephen H Siemsen 
© 2015 Chris Jaster |
|
Bromus maritimus Maritime brome
native
Perennial grass 
© 2020 Ken Hickman 
© 2016 Richard Chasey 
© 2017 Toni Corelli |
|
Calandrinia menziesii red maids, Calandrinia
native
Annual herb 
© 2021 Mary Ann Machi 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Calochortus albus White fairy lantern, White globe lily
native
Perennial herb 
© 2019 David Greenberger 
© 2019 Cynthia Powell 
© 2016 Steve Matson |
|
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 
© 2018 Adonis Tate |
|
Cardamine californica California toothwort, milkmaids
native
Perennial herb 
© 2020 Barbara Peck 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Cardamine oligosperma Bitter cress, Idaho bittercress
native
Annual, Perennial herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2008 Steve Matson |
|
Carduus pycnocephalus Italian thistle
• invasive non-native
Annual herb 
© 2019 Gary McDonald 
© 2023 Diana Wahl 
© 2023 Ron Vanderhoff |
|
Castilleja affinis ssp. affinis Coast indian paintbrush
native
Perennial herb 
© 2006 Steve Matson 
© 2006 Steve Matson 
© 2019 Ron Vanderhoff |
|
Cenchrus setaceus Small Tree-Mallow
|
|
Centaurea melitensis Maltese star thistle, Napa star thistle, Tocalote
• invasive non-native
Annual herb 
© 2019 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Laura Anna Arellano |
|
Cerastium glomeratum Large mouse ears, Mouseear chickweed, Sticky chickweed
non-native
Annual herb 
© 2024 Dana York 
© 2023 Ron Vanderhoff 
© 2023 R.A. Chasey |
|
Chlorogalum pomeridianum var. pomeridianum Common soaproot, Wavyleaf soap plant
native
Perennial herb 
© 2021 Sue Graue 
© 2015 Sharon King & Randy Aeschliman 
© 2023 Ron Vanderhoff |
|
Chondrilla juncea Hogbite, Skeleton weed
• invasive non-native
Perennial herb 
© 2021 George Williams 
© 2024 Mike Russler 
© 2021 Bob Sweatt |
|
Cirsium vulgare Bull thistle
• invasive non-native
Perennial herb 
© 2017 James Bailey 
© 2020 Bob Sweatt 
© 2020 Bob Sweatt |
|
Clarkia unguiculata Elegant clarkia, Mountain garland, Woodland clarkia
native
Annual herb 
© 2019 David Greenberger 
© 2019 Bryant Baker 
© 2021 Mike Russler |
|
Claytonia perfoliata ssp. perfoliata Claytonia, Miner's lettuce
native
Annual herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2008 Steve Matson |
|
Clematis lasiantha Chaparral clematis, Pipestem
native
Perennial herb, Vine 
© 2008 Steve Matson 
© 2018 Steve Matson 
© 2024 Dana York |
|
Collinsia heterophylla Purple chinese houses
native
Annual herb 
© 2022 Mary Ann Machi 
© 2019 David Greenberger 
© 2019 Ron Vanderhoff |
|
Convolvulus arvensis Field bindweed, Orchard morningglory
• invasive non-native
Perennial herb, Vine 
© 2022 Steve Matson 
© 2021 Ron Vanderhoff 
© 2022 Steve Matson |
|
Corethrogyne filaginifolia Common sandaster
native
Perennial herb 
© 2022 Mike Russler 
© 2018 Ron Vanderhoff 
© 2019 Diane Etchison |
|
Crassula connata Pigmy weed, Sand pygmy weed, Sand pygmyweed
native
Annual herb 
© 2020 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
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 |
|
Danthonia californica California oatgrass
native
Perennial grass 
© 2024 R.A. Chasey 
© 2021 John Rawlings 
© 2023 R.A. Chasey |
|
Delphinium parryi ssp. parryi Parry's larkspur, San bernardino larkspur
native
Perennial herb 
© 2022 Mike Russler 
© 2021 R.A. Chasey 
© 2013 James Gonsman |
|
Diplacus aurantiacus var. aurantiacus Orange Bush Monkeyflower
native
Shrub 
© 2024 Steve Conger 
© 2024 Steve Conger 
© 2019 Gary McDonald |
|
Dipterostemon capitatus ssp. capitatus Blue dicks
native
Perennial herb 
© 2008 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Drymocallis glandulosa var. glandulosa Sticky cinquefoil
native
Perennial herb 
© 2020 Diane Etchison 
© 2017 Steve Matson 
© 2021 Mike Russler |
|
Elymus condensatus Giant wild rye
native
Perennial grass 
© 2020 Ron Vanderhoff 
© 2024 Mel Letterman 
© 2020 Diane Etchison |
|
Elymus triticoides Beardless wild rye
native
Perennial grass 
© 2024 Erin Bergman 
© 2021 Ron Vanderhoff 
© 2018 Rachelle Gray |
|
Epilobium brachycarpum Annual fireweed, Autumn willowweed, Panicled willow herb
native
Annual herb 
© 2023 Mary Ann Machi 
© 2019 Ramona Robison 
© 2020 Ron Vanderhoff |
|
Epilobium canum ssp. canum California fuchsia, Hummingbird trumpet
native
Perennial herb 
© 2018 Ron Vanderhoff 
© 2018 Ron Vanderhoff 
© 2018 Ron Vanderhoff |
|
Erigeron bonariensis Flax-leaved horseweed
non-native
Annual herb 
© 2021 Donald Burk 
© 2017 Gary McDonald 
© 2023 Ron Vanderhoff |
|
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 fasciculatum var. fasciculatum California buckwheat, Eastern mojave buckwheat
native
Shrub 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2019 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 |
|
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 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Euphorbia peplus Petty spurge
non-native
Annual herb 
© 2006 Steve Matson 
© 2022 Alice Cummings 
© 2018 MCOSD EDRR |
|
Euphorbia spathulata Reticulate seeded spurge, Warty spurge
native
Annual herb 
© 2021 R.A. Chasey 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Festuca myuros Rattail sixweeks grass
• invasive non-native
Annual grass 
© 2021 Aaron Echols 
© 2021 Ron Vanderhoff 
© 2022 John Rawlings |
|
Festuca perennis Italian rye grass
• invasive non-native
Annual, Perennial grass 
© 2019 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Foeniculum vulgare Biscuit root, Sweet fennel
• invasive non-native
Perennial herb 
© 2019 Nicole Leatherman 
© 2019 Ron Vanderhoff 
© 2018 Henry DiRocco |
|
Frangula californica ssp. californica California coffeeberry
native
Shrub 
© 2015 Steve Matson 
© 2015 Steve Matson 
© 2019 Ron Vanderhoff |
|
Fritillaria biflora var. biflora Chocolate lily
native
Perennial herb (bulb) 
© 2006 Steve Matson 
© 2006 Steve Matson 
© 2006 Steve Matson |
|
Galium aparine Cleavers, Common bedstraw, Goose grass
native
Annual herb 
© 2020 Ron Vanderhoff 
© 2023 Julia Markey 
© 2020 Ron Vanderhoff |
|
Galium porrigens var. porrigens Climbing bedstraw, Graceful bedstraw, Oval leaved bedstraw
native
Vine, Shrub 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2022 Julia Larke |
|
Geranium dissectum Cranesbill, Cut leaved geranium, Cutleaf geranium
• invasive non-native
Annual herb 
© 2021 Al Keuter 
© 2023 Ron Vanderhoff 
© 2014 Bryan Derr |
|
Hazardia squarrosa var. squarrosa Saw toothed goldenbush, Sawtooth goldenbush
native
Shrub 
© 2021 Mike Russler 
© 2021 Mary Conway 
© 2021 Mary Conway |
|
Helminthotheca echioides Bristly ox-tongue
• invasive non-native
Annual, Perennial herb 
© 2016 Hayley Ross 
© 2019 Rachelle Gray 
© 2012 Elizabeth Brusati |
|
Hemizonia congesta ssp. luzulifolia Hayfield tarweed, Woodrush tarweed
native
Annual herb 
© 2013 Arcangelo Wessells 
© 2022 R.A. Chasey 
© 2022 R.A. Chasey |
|
Hesperocnide tenella Western nettle, Western stinging nettle, Western stingingnettle
native
Annual herb 
© 2023 Ken-ichi Ueda 
© 2006 Steve Matson 
© 2020 Ken Hickman |
|
Heteromeles arbutifolia Christmas berry, Toyon
native
Shrub 
© 2015 James Gonsman 
© 2017 Gary McDonald 
© 2017 Gary McDonald |
|
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 |
|
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 |
|
Lagophylla ramosissima Branched lagophylla, Common hareleaf
native
Annual herb 
© 2024 Mike Russler 
© 2021 Dee Shea Himes 
© 2022 Mike Russler |
|
Lathyrus vestitus var. vestitus Common pacific pea, Hillside pea, Wild sweetpea
native
Perennial herb 
© 2023 Steve Conger 
© 2022 Charles Russell 
© 2015 Chris Jaster |
|
Logfia gallica Narrowleaf cottonrose
non-native
Annual herb 
© 2017 Barbara Boethling 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Lomatium utriculatum Bladder parsnip, Common lomatium, Hog fennel
native
Perennial herb 
© 2006 Steve Matson 
© 2006 Steve Matson 
© 2015 James Gonsman |
|
Lupinus bicolor Annual lupine, Bicolored lupine, Miniature lupine
native
Annual, Perennial herb 
© 2024 Mary Ann Machi 
© 2022 Mike Russler 
© 2024 Mary Ann Machi |
|
Lupinus nanus Sky lupine
native
Annual herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 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 
© 2022 Chris McDonald 
© 2023 Ron Vanderhoff |
|
Malva nicaeensis Bull mallow
non-native
Annual herb 
© 2023 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Malva parviflora Cheeseweed mallow
non-native
Annual herb 
© 2022 Mike Russler 
© 2022 Donald Burk 
© 2022 Mike Russler |
|
Marah fabacea California man-root
native
Perennial herb, Vine 
© 2018 Gary McDonald 
© 2018 MCOSD EDRR 
© 2021 Cyril Guyot |
|
Marrubium vulgare White horehound
• invasive non-native
Perennial herb 
© ©2013 Gary McDonald 
© 2015 Diane Etchison 
© 2018 Nancy Hamlett |
|
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 indicus Annual yellow sweetclover, Sourclover
non-native
Annual herb 
© 2019 Randy Huey 
© 2019 Randy Huey 
© 2017 Rosalie Benitez |
|
Monardella villosa ssp. obispoensis San luis obispo coyote mint
native
Perennial herb 
© 2019 David Wolfson 
© 2019 David Wolfson 
© 2020 Dee Shea Himes |
|
Nemophila menziesii Baby blue eyes
native
Annual herb 
© 2019 Matt Berger 
© 2019 Diane Etchison 
© 2019 Ron Vanderhoff |
|
Oxalis pilosa Hairy wood sorrel
native
Annual herb 
© 2022 R.A. Chasey 
© 2009 Avis Boutell 
© 2022 Cynthia Powell |
|
Paeonia californica California peony
native
Perennial herb 
© 2024 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2019 Susan McDougall |
|
Papaver rhoeas Corn poppy
non-native
Annual herb 
© 2019 Nathan Taxel 
© 2023 Ron Vanderhoff 
© 2022 R.A. Chasey |
|
Pellaea andromedifolia Coffee cliffbrake, Coffee fern
native
Fern 
© 2023 Steve Conger 
© 2021 Steve Matson 
© 2021 Mike Russler |
|
Pellaea mucronata var. mucronata Bird's foot fern
native
Fern 
© 2018 Rachelle Gray 
© 2023 Helen Hancock 
© 2023 Helen Hancock |
|
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 malvifolia Stinging phacelia
native
Annual herb 
© 2018 Michael Mitchell 
© 2022 Jennifer Mo 
© 2013 Toni Corelli |
|
Pholistoma auritum var. auritum Blue fiesta flower, Blue fiestaflower, Fiesta flower
native
Annual herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Plagiobothrys nothofulvus Rusty haired popcorn flower, Rusty popcorn flower, Rusty popcornflower
native
Annual herb 
© 2011 Steve Matson 
© 2011 Steve Matson 
© 2015 Steve Matson |
|
Plantago erecta California plantain, Dotseed plantain, Foothill plantain
native
Annual herb 
© 2008 Steve Matson 
© 2022 Steve Matson 
© 2022 Steve Matson |
|
Plantago lanceolata English plantain, Narrow leaved plantain, Ribgrass
• invasive non-native
Perennial herb 
© 2017 Gary McDonald 
© 2019 Joe Engelbrecht 
© 2021 Ken Lunders |
|
Platanus racemosa California sycamore, Western sycamore
native
Tree 
© 2021 Ron Vanderhoff 
© 2018 Ron Vanderhoff 
© 2019 Rachelle Gray |
|
Platystemon californicus Cream cups, Creamcups
native
Annual herb 
© 2017 Nathanial Wigington 
© 2022 John L. Thompson 
© 2022 John L. Thompson |
|
Polypodium californicum California polypody
native
Fern 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2023 Keir Morse |
|
Primula clevelandi Small Tree-Mallow
|
|
Primula clevelandii var. patulum Padre's shooting star
native
Perennial herb 
© 2006 Steve Matson 
© 2022 David popp 
© 2020 Aaron Echols |
|
Prunus ilicifolia var. ilicifolia Holly leaf cherry, Hollyleaf cherry
native
Tree, Shrub 
© 2018 David Greenberger 
© 2019 Ron Vanderhoff 
© 2020 James Gonsman |
|
Pseudognaphalium biolettii Two-color rabbit-tobacco
native
Perennial herb 
© 2019 David Greenberger 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Pseudognaphalium californicum Ladies' tobacco
native
Annual, Perennial herb 
© 2019 Gary McDonald 
© 2020 Steven M Norris 
© 2021 Ron Vanderhoff |
|
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 |
|
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 |
|
Raphanus sativus Cultivated radish, Jointed charlock, Wild radish
• invasive non-native
Annual, Biennial herb 
© 2017 Lisa Miller 
© 2020 Ron Vanderhoff 
© 2023 Julia Markey |
|
Rhamnus crocea Redberry buckthorn
native
Shrub 
© 2011 Michael Mitchell 
© 2022 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Rosa californica California wild rose, California wildrose
native
Shrub 
© 2022 Suzanne L. Weakley 
© 2022 Suzanne L. Weakley 
© 2021 Sue Graue |
|
Rosa spithamea Ground rose, Sonoma rose
native
Shrub 
© 2021 David Gowen 
© 1973 Geoff Burleigh 
© 2020 David Krause |
|
Rubus ursinus California blackberry, Pacific blackberry
native
Vine, Shrub 
© 2018 Ken Lunders 
© 2019 Ron Vanderhoff 
© 2015 Kelli Kallenborn |
|
Rumex acetosella Common sheep sorrel
• invasive non-native
Perennial herb 
© 2017 Gary McDonald 
© 2008 Steve Matson 
© 2019 Patrick Furtado |
|
Rumex crispus Curly dock, Curly leaved dock, Rhubarb
• invasive non-native
Perennial herb 
© 2018 Tim Lewis 
© 2019 Diane Etchison 
© 2023 Ron Vanderhoff |
|
Rumex pulcher Fiddle dock
non-native
Perennial herb 
© 2020 Ryan Carle 
© 2022 Chris McDonald 
© 2021 David popp |
|
Salix lasiolepis Arroyo willow
native
Tree, Shrub 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2020 Steve Matson |
|
Salsola tragus Prickly russian thistle, Russianthistle, Tumbleweed
• invasive non-native
Annual herb 
© 2017 Ron Vanderhoff 
© 2018 Angelique Herman 
© 2023 Cynthia Powell |
|
Saltugilia australis Southern gilia
native
Annual herb 
© 2015 Ron Vanderhoff 
© 2021 Ron Vanderhoff  © 2015 Keir Morse |
|
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 bipinnata Poison sanicle
native
Perennial herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2022 R.A. Chasey |
|
Sanicula crassicaulis Gamble weed, Pacific blacksnakeroot, Pacific sanicle
native
Perennial herb 
© 2023 Steve Conger 
© 2023 Steve Conger 
© 2021 Steve Laymon |
|
Schinus molle Peruvian pepper tree, Peruvian peppertree
• invasive non-native
Tree 
© 2021 stephen rosenthal 
© 2017 William McCarey 
© 2023 Ron Vanderhoff |
|
Scrophularia californica ssp. californica California bee plant, California figwort
native
Perennial herb 
© 2020 Bob Sweatt 
© 2006 Steve Matson 
© 2019 Cynthia Powell |
|
Scrophularia californica ssp. floribunda California bee plant, California figwort
native
Perennial herb
© 2020 Bob Sweatt
© 2006 Steve Matson
© 2019 Cynthia Powell |
|
Selaginella bigelovii Bigelow's moss fern, Bigelow's spike moss, Bushy spikemoss
native
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2018 Ron Vanderhoff |
|
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) 
© 2020 David Greenberger 
© 2021 Maria Stokes 
© 2021 Heather Brady DeQuincy |
|
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 |
|
Sisymbrium officinale Hedge mustard, Hedgemustard
non-native
Annual herb 
© 2021 Ann Garside 
© 2022 Julian Geoghegan 
© 2021 Ron Vanderhoff |
|
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 
© 2006 Steve Matson 
© 2006 Steve Matson |
|
Solanum umbelliferum var. xanti Blue witch nightshade, Bluewitch nightshade
native
Shrub 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 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 |
|
Stellaria media Chickweed
non-native
Annual herb 
© 2018 Gary McDonald 
© 2018 Gary McDonald 
© 2015 Diane Etchison |
|
Stephanomeria exigua ssp. coronaria Milk aster, White plume wirelettuce, Whiteplume wirelettuce
native
Annual herb 
© 2024 Mike Russler 
© 2024 Mike Russler 
© 2023 Ryan O'Dell |
|
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 |
|
Symphoricarpos mollis Creeping snowberry, Trailing snowberry
native
Shrub 
© 2019 Ron Vanderhoff 
© 2020 Cara Wilcox 
© 2019 Ron Vanderhoff |
|
Torilis arvensis Field hedge parsley, Spreading hedgeparsley, Tall Sock-Destroyer
• invasive non-native
Annual herb 
© 2019 Ron Vanderhoff 
© 2017 Gary McDonald 
© 2018 Lindsey Hack |
|
Toxicodendron diversilobum Poison oak, Poisonoak, Western Poison Oak
native
Vine, Shrub 
© 2020 Ron Vanderhoff 
© 2019 Randy Huey 
© 2021 Bryant Baker |
|
Tragopogon porrifolius Purple salsify
non-native
Perennial herb 
© 2019 Julie dinsdale 
© 2015 David Wolfson 
© 2020 Martin Cooper |
|
Trifolium willdenovii Tomcat clover
native
Annual herb 
© 2024 Steve Conger 
© 2024 Steve Conger 
© 2018 Stacie Wolny |
|
Umbellularia californica Bay laurel, California bay, California laurel, bay tree
native
Tree 
© 2023 Mary Ann Machi 
© 2016 Steve Matson 
© 2023 Mary Ann Machi |
|
Urtica urens Annual stinging nettle, Dwarf nettle
non-native
Annual herb 
© 2019 Gary McDonald 
© 2018 Ron Vanderhoff 
© 2018 Ron Vanderhoff |
|
Verbena lasiostachys var. lasiostachys Vervain, Western vervain
native
Perennial herb 
© 2010 Steve Matson 
© 2010 Steve Matson 
© 2010 Steve Matson |
|
Vicia sativa ssp. sativa Garden vetch, Pubescent common vetch, Spring vetch
non-native
Annual herb, Vine 
© 2007 Toni Corelli 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Vicia villosa ssp. varia Smooth vetch, Thick fruited vetch, Winter vetch
non-native
Annual herb, Vine  © 2006 Steve Matson 
© 2017 Gary McDonald 
© 2017 Gary McDonald |
|
Viola pedunculata California golden violet, Johnny jump up
native
Perennial herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |