| ||||||
|
Reservoir Canyon and Bowden Ranch Open Spaces
San Luis Obispo County |
|
|||||
| David Keil / CNPS-SLO (2019-06-07) | ||||||
| 318 PLANTS |
|
Acacia melanoxylon Blackwood acacia
• invasive non-native
Tree 
© 2022 Julian Geoghegan 
© 2019 Julian Geoghegan 
© 2023 Jennifer Mo |
|
Acer macrophyllum Big leaf maple, Bigleaf maple
native
Tree 
© 2020 Diane Etchison 
© 2024 Mary Ann Machi 
© 2018 Steve Matson |
|
Achillea millefolium Common yarrow
native
Perennial herb 
© 2022 Andy Ford 
© 2020 Bob Sweatt 
© 2018 Gary McDonald |
|
Acmispon americanus var. americanus American bird's foot trefoil, American trefoil, Spanish lotus
native
Annual herb 
© 2015 Steve Matson 
© 2015 Steve Matson 
© 2015 Steve Matson |
|
Acmispon glaber var. glaber Deerweed
native
Perennial herb 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Acmispon junceus var. 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 |
|
Acmispon wrangelianus Wrangel lotus
native
Annual herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Adelinia grandis Hound's tongue, Western houndstongue, Adelinia
native
Perennial herb 
© 2022 David Strauch 
© 2007 Steve Matson 
© 2021 Dee Shea Himes |
|
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 |
|
Ageratina adenophora Sticky snakeroot, Thoroughwort
• invasive non-native
Perennial herb 
© 2019 Ron Vanderhoff 
© 2017 Keir Morse 
© 2019 Ron Vanderhoff |
|
Agoseris grandiflora var. grandiflora Giant mountain dandelion
native
Perennial herb 
© 2007 Gerald Carr 
© 2007 Gerald Carr 
© 2012 Michael Mitchell |
|
Agrostis pallens Leafy bent grass, Diego bent grass, Seashore bentgrass
native
Perennial grass 
© 2021 John Rawlings 
© 2020 Susan McDougall 
© 2021 John Rawlings |
|
Allium haematochiton Red skinned onion, Redskin onion
native
Perennial herb (bulb) 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
|
Antirrhinum kelloggii Climbing snapdragon, Kellogg's snapdragon, Lax snapdragon
native
Annual herb 
© 2023 Ron Vanderhoff 
© 2019 David Greenberger 
© 2019 Ron Vanderhoff |
|
Aphyllon californicum ssp. jepsonii Jepson's california broom rape
native
Perennial herb (parasitic) 
© 2019 Ken Hickman 
© 2018 Brian and Eileen Keelan 
© 2019 Ken Hickman |
|
Apiastrum angustifolium Mock parsley, Wild celery, Wild parsley
native
Annual herb 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Apium graveolens Smallage, Garden celery
non-native
Annual, Biennial herb 
© 2016 Joan Hampton 
© 2019 Nathan Taxel 
© 2016 Joan Hampton |
|
Apocynum androsaemifolium Bitter dogbane, Spreading dogbane
native
Perennial herb 
© 2003 Steve Matson 
© 2003 Steve Matson 
© 2003 Steve Matson |
|
Aquilegia eximia Serpentine columbine, Sticky columbine, Van Houtte's columbine
native
Perennial herb 
© 2024 Charles Russell 
© 2019 Ken Hickman 
© 2021 Mike Russler |
|
Aristida adscensionis Six weeks three awn, Sixweeks threeawn
native
Annual grass 
© 2023 Keir Morse 
© 2023 Keir Morse 
© 2016 James Bailey |
|
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 |
|
Asclepias fascicularis Narrow leaf milkweed
native
Perennial herb 
© 2010 Steve Matson 
© 2010 Steve Matson 
© 2023 Ron Vanderhoff |
|
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 |
|
Astragalus gambelianus Dwarf loco weed, Gambel's dwarf milk vetch, Gambel's locoweed
native
Annual herb 
© 2019 Ron Vanderhoff 
© 2022 Mike Russler 
© 2024 R.A. Chasey |
|
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 |
|
Azolla filiculoides American water fern, mosquito fern, Mosquito fern, Pacific mosquitofern
native
Fern 
© 2020 Ron Vanderhoff 
© 2023 R.A. Chasey 
© 2021 Zoya Akulova-Barlow |
|
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 |
|
Bloomeria crocea var. aurea Common goldenstar
native
Perennial herb 
© 2019 David Greenberger 
© 2020 Kimberly Coates 
© 2018 Gary McDonald |
|
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 |
|
Briza maxima Big quaking grass, Big quakinggrass, Rattlesnake grass
• invasive non-native
Annual grass 
© 2017 Gary McDonald 
© 2018 Bill Schmidt 
© 2017 Gary McDonald |
|
Bromus carinatus var. carinatus California brome, Mountain brome
native
Perennial grass 
© 2016 Richard Chasey  © 2013 Jean Pawek 
© 2021 Amelia Ryan |
|
Bromus diandrus Bromegrass, Ripgut brome, Ripgut grass
• invasive non-native
Annual grass 
© Alize 
© 2021 Richard Spjut 
© 2024 David popp |
|
Bromus hordeaceus Soft brome, Soft chess
• invasive non-native
Annual grass 
© 2023 Ron Vanderhoff 
© 2018 Gary McDonald 
© 2018 Gary McDonald |
|
Bromus madritensis Foxtail chess, foxtail brome, Madrid brome, Spanish brome
non-native
Annual grass 
© 2022 Steve Matson 
© 2023 Stephen H Siemsen 
© 2015 Chris Jaster |
|
Bromus pseudolaevipes Coast range brome, Southern chinook brome
native
Perennial grass 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff |
|
Bromus rubens Red brome
• invasive non-native
Annual grass 
© 2015 Chris Jaster 
© 2015 jamie smith 
© 2018 Gary McDonald |
|
Calibrachoa parviflora Wild petunia
native
Annual herb 
© 2017 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
|
Calochortus albus White fairy lantern, White globe lily
native
Perennial herb 
© 2016 Steve Matson 
© 2019 Ron Vanderhoff 
© 2016 Steve Matson |
|
Calochortus clavatus var. clavatus Club haired mariposa lily, Clubhair mariposa lily
• rare native
Perennial herb (bulb) 
© 2025 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 |
|
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 nudata Dudley's sedge, Naked sedge, Torrent sedge
native
Perennial grasslike herb 
© 2022 R.A. Chasey 
© 2016 David Greenberger 
© 2014 John Malpas |
|
Carex obispoensis San Luis Obispo sedge, San Luis sedge
• rare native
Perennial grasslike herb (rhizomatous) 
© 2006 Steve Matson  © 2012 Wendy Fisher 
© 2006 Steve Matson |
|
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 densiflora ssp. obispoensis Obispo indian paintbrush, San luis obispo owl's clover
native
Annual herb 
© 2024 Kyle Suchy 
© 2023 Kyle Suchy 
© 2024 Kyle Suchy |
|
Ceanothus cuneatus var. ramulosus Buck brush
native
Shrub  © 2023 lorri-gong  © 2021 lorri-gong  © 2024 olliecat |
|
Centaurea melitensis Maltese star thistle, Napa star thistle, Tocalote
• invasive non-native
Annual herb 
© 2019 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Laura Anna Arellano |
|
Cercocarpus betuloides var. betuloides Birch leaf mountain mahogany
native
Tree, Shrub 
© 2021 Steve Matson 
© 2021 Steve Matson 
© 2016 Ron Vanderhoff |
|
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 |
|
Chorizanthe palmeri Palmer's spineflower
• rare native
Annual herb 
© 2019 David Greenberger 
© 2012 Terrence Gosliner 
© 2023 Mike Russler |
|
Cirsium fontinale var. obispoense Chorro creek bog thistle
• rare native
Perennial herb 
© 2015 David Wolfson 
© 2025 Aaron Rocha 
© 2020 David Greenberger |
|
Cirsium vulgare Bull thistle
• invasive non-native
Perennial herb 
© 2017 James Bailey 
© 2020 Bob Sweatt 
© 2020 Bob Sweatt |
|
Clarkia affinis Chaparral clarkia, Chaparral fairyfan
native
Annual herb 
© 2025 Ken-ichi Ueda 
© 2024 Sue Luft 
© 2020 Steve Laymon |
|
Clarkia bottae Botta's clarkia, Punch bowl godetia
native
Annual herb 
© 2025 Mike Russler 
© 2023 Ron Vanderhoff 
© 2024 Ron Vanderhoff |
|
Clarkia purpurea ssp. quadrivulnera Four-spot, Purple clarkia, Purple godetia
native
Annual herb 
© 2014 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Clarkia unguiculata Elegant clarkia, Mountain garland, Woodland clarkia
native
Annual herb 
© 2024 Bob Stahmer 
© 2025 Mary Conway 
© 2021 Mike Russler |
|
Claytonia perfoliata ssp. perfoliata Claytonia, Miner's lettuce
native
Annual herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2008 Steve Matson |
|
Collinsia heterophylla Purple chinese houses
native
Annual herb 
© 2022 Mary Ann Machi 
© 2019 David Greenberger 
© 2019 Ron Vanderhoff |
|
Conium maculatum Poison hemlock
• invasive non-native
Perennial herb 
© 2024 Cynthia Powell 
© 2013 Toni Corelli 
© 2016 Cynthia Powell |
|
Cordylanthus rigidus ssp. rigidus Rigid bird's beak, Stiffbranch bird's beak
native
Annual herb (hemiparasitic) 
© 2021 Mike Russler 
© 2021 Mike Russler 
© 2021 Mike Russler |
|
Corethrogyne filaginifolia Common sandaster
native
Perennial herb 
© 2022 Mike Russler 
© 2018 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Cornus sericea ssp. occidentalis Western dogwood
native
Shrub 
© 2019 David Greenberger 
© 2018 Lynn Overtree 
© 2020 Susan McDougall |
|
Cortaderia selloana Uruguayan pampas grass
• invasive non-native
Perennial grass 
© 2023 Cynthia Powell 
© 2023 Randall English 
© 2022 Ron Vanderhoff |
|
Cotoneaster franchetii Cotoneaster, Francheti cotoneaster, Orange cotoneaster
• invasive non-native
Shrub 
© 2021 Cynthia Powell 
© 2021 Lenihan Mazur 
© 2024 Morgan Stewart |
|
Crassula connata Pigmy weed, Sand pygmy weed, Sand pygmyweed
native
Annual herb 
© 2019 Ron Vanderhoff 
© 2022 Sameer Saroa 
© 2019 Adam Chasey |
|
Crocanthemum scoparium peak rush-rose, broom rush-rose
native
Shrub 
© 2020 Stacie Wolny 
© 2020 Stacie Wolny 
© 2020 Stacie Wolny |
|
Croton setiger Turkey-mullein
native
Annual herb 
© 2011 Steve Matson 
© 2011 Steve Matson 
© 2014 Richard Chasey |
|
Cryptantha clevelandii var. florosa Coastal cryptantha
native
Annual herb 
© 2020 David Greenberger 
© 2024 Ron Vanderhoff 
© 2023 Ken-ichi Ueda |
|
Cryptantha microstachys Popcorn flower, Tejon cryptantha
native
Annual herb 
© 2019 Diane Etchison 
© 2018 Ron Vanderhoff 
© 2017 Diane Etchison |
|
Cryptantha muricata var. muricata Showy prickly-nut cryptantha
native
Annual herb 
© 2023 Mike Russler 
© 2023 Mike Russler 
© 2023 Mike Russler |
|
Cynodon dactylon Bermuda grass, Bermudagrass
• invasive non-native
Perennial grass 
© 2021 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Daucus pusillus American wild carrot, Rattlesnake weed
native
Annual herb 
© 2019 Diane Etchison 
© 2022 David Wolfson 
© 2019 John Rawlings |
|
Delphinium parryi ssp. eastwoodiae Eastwood's larkspur
• rare native
Perennial herb 
© 2023 Mike Russler 
© 2023 Mike Russler 
© 2023 Mike Russler |
|
Dendromecon rigida Bush poppy, Tree poppy
native
Shrub 
© 2024 Mike Russler 
© 2024 Mike Russler 
© 2020 Ron Vanderhoff |
|
Deschampsia elongata Hairgrass, Slender hairgrass
native
Perennial grass 
© 2021 John Rawlings 
© 2021 John Rawlings 
© 2023 Robert Steers |
|
Diplacus aurantiacus ssp. aurantiacus Orange Bush Monkeyflower
native
Shrub 
© 2024 Steve Conger 
© 2024 Steve Conger 
© 2019 Mary Gerbic |
|
native
Perennial herb ![Dipterostemon capitatus ssp. capitatus [Dichelostemma capitatum ssp. capitatum]](/entry/occdetail.html?photo=/app/up/entry/616/185047.jpg)
© 2023 Steve Matson ![Dipterostemon capitatus ssp. capitatus [Dichelostemma capitatum ssp. capitatum]](/entry/occdetail.html?photo=/app/up/entry/406/122014.jpg)
© 2022 Steve Matson ![Dipterostemon capitatus ssp. capitatus [Dichelostemma capitatum ssp. capitatum]](/entry/occdetail.html?photo=/app/up/entry/500/150235.jpg)
© 2019 Steve Matson |
|
Dryopteris arguta California wood fern, Coastal wood fern, Shield fern
native
Fern 
© 2023 Julia Markey 
© 2019 Rebecca Crowe 
© 2018 James Gonsman |
|
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 |
|
Dudleya pulverulenta Chalk dudleya
native
Perennial herb 
© 2018 Ron Vanderhoff 
© 2020 Julia Markey 
© 2019 Diane Etchison |
|
Eleocharis macrostachya Common spikerush, Creeping spike rush, Pale spikerush
native
Perennial grasslike herb 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2003 Steve Matson |
|
Elymus condensatus Giant wild rye
native
Perennial grass 
© 2020 Ron Vanderhoff 
© 2024 Mel Letterman 
© 2020 Diane Etchison |
|
Elymus glaucus ssp. glaucus Blue wild rye, Blue wildrye, Western rye grass
native
Perennial grass 
© 2023 R.A. Chasey 
© 2021 Arlee Montalvo 
© 2022 Ron Vanderhoff |
|
Elymus multisetus Big squirreltail grass
native
Perennial grass 
© 2019 Ron Vanderhoff 
© 2023 Helen Hancock 
© 2021 Denise Defreese |
|
Elymus triticoides Beardless wild rye
native
Perennial grass 
© 2024 Erin Bergman 
© 2021 Ron Vanderhoff 
© 2018 Rachelle Gray |
|
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 |
|
Epilobium minutum Chaparral willowherb, Desert willow herb, Little willowherb
native
Annual herb 
© 2017 Michael Mitchell 
© 2021 R.A. Chasey 
© 2019 Ken Lunders |
|
Equisetum telmateia ssp. braunii Giant horse tail, Giant horsetail
native
Fern 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2022 Suzanne L. Weakley |
|
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 |
|
Erigeron philadelphicus Philadelphia fleabane
native
Perennial herb  © andreenannemarie 
© 2022 Dana York  © Bryce Strobel |
|
Eriogonum elongatum var. elongatum Long stemmed buckwheat
native
Perennial herb 
© 2017 Ron Vanderhoff 
© 2019 Aaron Echols 
© 2021 Mike Russler |
|
Eriogonum fasciculatum var. foliolosum California buckwheat, Eastern mojave buckwheat, Red topped buckwheat
native
Shrub 
© 2016 Michael Mitchell 
© 2015 Michael Mitchell 
© 2015 Michael Mitchell |
|
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 caespitosa Foothill poppy, Tufted eschscholzia, Tufted poppy
native
Annual herb 
© 2019 Ron Vanderhoff 
© 2024 Dana York 
© 2024 Dana York |
|
Eschscholzia californica California poppy
native
Annual, Perennial herb 
© 2019 Dee Shea Himes 
© 2021 Ron Vanderhoff 
© 2019 Amy Rapport |
|
Eucalyptus globulus Blue gum, Tasmanian bluegum
• invasive non-native
Tree 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
|
Eucrypta chrysanthemifolia var. chrysanthemifolia Common eucrypta, Spotted hideseed
native
Annual herb 
© 2024 Mike Russler 
© 2023 Ron Vanderhoff 
© 2024 Mike Russler |
|
Euphorbia peplus Petty spurge
non-native
Annual herb 
© 2025 Donald Burk 
© 2022 Alice Cummings 
© 2018 MCOSD EDRR |
|
Euphorbia spathulata Reticulate seeded spurge, Warty spurge
native
Annual herb 
© 2008 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Festuca californica California fescue
native
Perennial grass 
© 2019 Justin Luong 
© 2022 Justin Luong 
© 2021 Veronica Yates |
|
Festuca elmeri Coast fescue, Elmer fescue
native
Perennial grass 
© 2022 John Rawlings 
© 2019 Ken Hickman 
© 2019 Ken Hickman |
|
Festuca microstachys Small fescue
native
Annual grass 
© 2011 Steve Matson 
© 2024 Emily R. Allen 
© 2011 Steve Matson |
|
Festuca myuros Rattail sixweeks grass
• invasive non-native
Annual grass 
© 2021 Aaron Echols 
© 2021 Ron Vanderhoff 
© 2022 John Rawlings |
|
Festuca occidentalis Western fescue
native
Perennial grass 
© 2011 Steve Matson 
© 2011 Steve Matson 
© 2011 Steve Matson |
|
Festuca octoflora Sixweeks grass
native
Annual grass 
© 2023 R.A. Chasey 
© 2020 Sara Timby 
© 2018 Ken Hickman |
|
Festuca perennis Italian rye grass
• invasive non-native
Annual, Perennial grass 
© 2019 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Foeniculum vulgare Biscuit root, Sweet fennel
• invasive non-native
Perennial herb 
© 2019 Ron Vanderhoff 
© 2023 Fred Roberts 
© 2022 Ryan O'Dell |
|
Frangula californica ssp. californica California coffeeberry
native
Shrub 
© 2015 Steve Matson 
© 2015 Steve Matson 
© 2019 Ron Vanderhoff |
|
Fritillaria biflora var. biflora Chocolate lily
native
Perennial herb (bulb) 
© 2006 Steve Matson 
© 2006 Steve Matson 
© 2006 Steve Matson |
|
Fritillaria ojaiensis Ojai fritillary
• rare native
Perennial herb (bulb) 
© 2020 John Game 
© 2020 G Froelich 
© 2019 Bryant Baker |
|
Galium andrewsii Needlemat galium, Phlox leaved bedstraw, Phloxleaf bedstraw
native
Perennial herb 
© 2022 Mike Russler 
© 2019 Marisa Persaud 
© 2022 Mike Russler |
|
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 |
|
Gamochaeta ustulata Featherweed
native
Perennial herb 
© 2019 Gary McDonald 
© 2019 Gary McDonald 
© 2019 Gary McDonald |
|
Garrya veatchii Canyon silktassel, Southern silk tassel, Veatch silktassel
native
Shrub 
© 2023 Devon Christian 
© 2016 Ron Vanderhoff 
© 2020 Bryant Baker |
|
Gastridium phleoides Nit grass
non-native
Annual grass 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2017 Gary McDonald |
|
Genista monspessulana French broom
• invasive non-native
Shrub 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2021 Michelle Karle |
|
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 |
|
Grindelia hirsutula Gumweed, Hairy gumweed
native
Perennial herb 
© 2021 R.A. Chasey 
© 2020 R.A. Chasey 
© 2015 Ken Lunders |
|
Hazardia squarrosa var. squarrosa Saw toothed goldenbush, Sawtooth goldenbush
native
Shrub 
© 2024 Mike Russler 
© 2024 Mike Russler 
© 2021 Mary Conway |
|
Helenium puberulum Rosilla, Sneezeweed
native
Perennial herb 
© 2021 Mike Russler 
© 2019 Patrick Furtado 
© 2019 Stacie Wolny |
|
Helminthotheca echioides Bristly ox-tongue
• invasive non-native
Annual, Perennial herb 
© 2016 Hayley Ross 
© 2019 Rachelle Gray 
© 2012 Elizabeth Brusati |
|
Hemizonia congesta ssp. luzulifolia Hayfield tarweed, Woodrush tarweed
native
Annual herb 
© 2025 Alaine Arslan 
© 2023 Alaine Arslan 
© 2022 R.A. Chasey |
|
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 
© 2020 Julia Markey 
© Geoff Burleigh 
© 2020 Matt Berger |
|
Heteromeles arbutifolia Christmas berry, Toyon
native
Shrub 
© 2015 James Gonsman 
© 2017 Gary McDonald 
© 2022 John Doyen |
|
Hirschfeldia incana Mediterranean hoary mustard, Short podded mustard, Summer mustard
• invasive non-native
Perennial herb 
© 2017 Gary McDonald 
© 2017 Gary McDonald 
© 2022 Ron Vanderhoff |
|
Hoita macrostachya California hemp, Large leather root
native
Perennial herb 
© 2020 Ron Vanderhoff 
© 2022 Natalie McNear 
© 2021 Julie King |
|
Holodiscus discolor Cream bush, Ocean spray, Oceanspray
native
Shrub 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2022 Steve Matson |
|
Hordeum marinum ssp. gussoneanum Barley, Mediterranean barley
non-native
Annual grass 
© 2018 Carolyn 
© 2020 Paul Aigner 
© 2017 Toni Corelli |
|
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 bufonius var. bufonius Toad rush
native
Annual grasslike herb 
© 2021 John Rawlings 
© 2023 R.A. Chasey 
© 2019 Ron Vanderhoff |
|
Juncus patens Common rush, Spreading rush
native
Perennial grasslike herb 
© 2022 R.A. Chasey 
© 2022 R.A. Chasey 
© 2018 Emily Allen |
|
Juncus xiphioides Iris leaved rush, Irisleaf rush
native
Perennial grasslike herb 
© 2025 R.A. Chasey 
© 2017 Ron Vanderhoff 
© 2023 R.A. Chasey |
|
Keckiella cordifolia Climbing penstemon, Heart leaved keckiella, Heartleaf keckiella
native
Shrub 
© 2020 Ron Vanderhoff 
© 2022 Bryant Baker 
© 2022 Bryant Baker |
|
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 |
|
Lasthenia gracilis Needle goldfields
native
Annual herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Lathyrus vestitus var. vestitus Common pacific pea, Hillside pea, Wild sweetpea
native
Perennial herb 
© 2019 Ron Vanderhoff 
© 2015 Chris Jaster 
© 2024 Ron Vanderhoff |
|
Layia jonesii Jones' tidytips, Jones's layia
• rare native
Annual herb 
© 2023 Chloe and Trevor Van Loon 
© 2023 Chloe and Trevor Van Loon 
© 2023 Chloe and Trevor Van Loon |
|
Layia platyglossa Coastal tidytips
native
Annual herb 
© 2015 Amy Rapport 
© 2019 Steve Matson 
© 2019 Steve Matson |
|
Lepidium nitidum Peppergrass, Shining pepper grass, Shining pepperweed
native
Annual herb 
© 2021 Steve Matson 
© 2016 Steve Matson  © 2025 Jason Flores |
|
Leptosiphon parviflorus Variable linanthus
native
Annual herb 
© 2008 Keir Morse 
© 2008 Keir Morse 
© 2008 Keir Morse |
|
Leptosyne douglasii Douglas' coreopsis
native
Annual herb 
© 2024 R.A. Chasey 
© 2020 Manzanita Dictionary 
© 2020 Manzanita Dictionary |
|
Lithophragma heterophyllum Hill star, Hillside woodland star
native
Perennial herb 
© 2019 David Greenberger 
© 2024 Suzanne L. Weakley 
© 2019 Mary Conway |
|
Lobularia maritima Sweet alyssum
• invasive non-native
Perennial herb 
© 2016 Michael Mitchell 
© 2016 Michael Mitchell 
© 2019 Patrick Furtado |
|
Logfia filaginoides California cottonrose
native
Annual herb 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2019 Steve Matson |
|
Logfia gallica Narrowleaf cottonrose
non-native
Annual herb 
© 2023 R.A. Chasey 
© 2024 Mike Russler 
© 2017 Barbara Boethling |
|
Lomatium caruifolium var. caruifolium Alkali desertparsley, Caraway leaved lomatium
native
Perennial herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 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 |
|
Lotus corniculatus Bird's foot trefoil, Birdfoot deervetch, Broadleaf birdsfoot trefoil
• invasive non-native
Perennial herb 
© 2005 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Lupinus albifrons var. abramsii Abrams' lupine
• rare native
Perennial herb 
© 2018 Michael Mitchell 
© 2018 Michael Mitchell 
© 2022 Ryan O'Dell |
|
Lupinus bicolor Annual lupine, Bicolored lupine, Miniature lupine
native
Annual, Perennial herb 
© 2018 Stacie Wolny 
© 2022 Mike Russler 
© 2019 Gary McDonald |
|
Lupinus hirsutissimus Stinging annual lupine, Stinging lupine
native
Annual herb 
© 2024 Mike Russler 
© 2023 Neil Uelman 
© 2019 Ron Vanderhoff |
|
Lupinus succulentus Arroyo lupine, Hollowleaf annual lupine, Succulent lupine
native
Annual herb 
© 2023 Andy Ford 
© 2018 Stacie Wolny 
© 2018 Stacie Wolny |
|
Lupinus truncatus Blunt leaved lupine, Collared annual lupine, Truncate leaf lupine
native
Annual herb 
© 2023 Caitlin Kreutz 
© 2023 Connor O'Hara-Baker 
© 2010 Michael Mitchell |
|
Luzula subsessilis Pacific woodrush
native
Perennial grasslike herb 
© 2024 John Rawlings 
© 2021 David popp 
© 2021 David popp |
|
Lysimachia arvensis Scarlet pimpernel
non-native
Annual herb 
© 2017 B.J. Dion 
© 2018 Stacie Wolny 
© 2017 B.J. Dion |
|
Lysimachia latifolia Pacific starflower
native
Perennial herb 
© 2008 Steve Matson 
© 2016 Steve Matson 
© 2024 Ben Spencer-Cooke |
|
Madia gracilis Grassy tarweed, Gumweed madia, Slender tarweed
native
Annual herb 
© 2024 Mike Russler 
© 2021 Amber Bedgood 
© 2019 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 |
|
Matricaria discoidea Pineapple weed
native
Annual herb 
© 2008 Steve Matson 
© 2008 Steve Matson 
© 2018 Stacie Wolny |
|
Medicago polymorpha Bur clover, Bur medic, California burclover
• invasive non-native
Annual herb 
© 2019 Gary McDonald 
© 2019 Gary McDonald 
© 2019 Gary McDonald |
|
Melica imperfecta California melic, Coast range melic, Small flowered melica
native
Perennial grass 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Melica torreyana Torrey melic, Torrey's melica, Torrey's melicgrass
native
Perennial grass 
© 2021 Dee Shea Himes 
© 2019 John Rawlings 
© 2023 Diana Wahl |
|
Melilotus albus White sweetclover
• invasive non-native
Annual, Biennial herb 
© 2021 Ron Vanderhoff 
© 2020 Bob Sweatt 
© 2022 Ron Vanderhoff |
|
Melilotus indicus Annual yellow sweetclover, Sourclover
non-native
Annual herb 
© 2019 Randy Huey 
© 2019 Randy Huey 
© 2017 Rosalie Benitez |
|
Micranthes californica Greene's saxifrage
native
Perennial herb 
© 2016 Steve Matson 
© 2016 Steve Matson 
© 2016 Steve Matson |
|
Microseris douglasii ssp. douglasii Douglas' microseris, Douglas' silverpuffs
native
Annual herb 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
|
Monardella palmeri Palmer's monardella
• rare native
Perennial herb (rhizomatous)  © 2001 CDFA  © 2001 CDFA 
© 2024 richard mcneill |
|
Monardella villosa ssp. obispoensis San luis obispo coyote mint
native
Perennial herb 
© 2019 David Wolfson 
© 2019 David Wolfson 
© 2020 Dee Shea Himes |
|
Nasturtium officinale Watercress
native
Perennial herb (aquatic) 
© 2012 Steve Matson 
© 2012 Steve Matson 
© 2012 Steve Matson |
|
Nuttallanthus texanus Blue toadflax
native
Annual, Perennial herb 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
|
Opuntia ficus-indica Mission cactus, Tuna cactus
non-native
Shrub (stem succulent) 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff |
|
Opuntia phaeacantha Brown spined prickly pear, Mojave prickly pear, Tulip pricklypear
native
Shrub (stem succulent) 
© 2021 R.A. Chasey 
© 2018 Diane Etchison 
© 2021 R.A. Chasey |
|
Oxalis pes-caprae Bermuda buttercup, Sourgrass
• invasive non-native
Perennial herb 
© 2019 Gary McDonald 
© 2017 Angelique Herman 
© 2015 Richard Chasey |
|
Paeonia californica California peony
native
Perennial herb 
© 2024 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2019 Susan McDougall |
|
Papaver californicum Fire poppy, Western poppy
native
Annual herb 
© 2014 Ron Vanderhoff 
© 2015 Ron Vanderhoff 
© 2020 Bryant Baker |
|
Pedicularis densiflora Warrior's plume, Indian warrior
native
Perennial herb 
© 2015 Dee Warenycia 
© 2019 Jason Mills 
© 2024 Mary Ann Machi |
|
Pellaea andromedifolia Coffee cliffbrake, Coffee fern
native
Fern 
© 2023 Steve Conger 
© 2021 Steve Matson 
© 2021 Mike Russler |
|
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 |
|
Perideridia pringlei Adobe yampah
• rare native
Perennial herb 
© 2023 Mike Russler 
© 2023 Mike Russler 
© 2023 Mike Russler |
|
Phacelia distans Common phacelia, Distant phacelia, Wild heliotrope
native
Annual herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2022 Ron Vanderhoff |
|
Phacelia imbricata ssp. imbricata Imbricate Phacelia
native
Annual herb 
© 2019 Steve Matson 
© 2019 Steve Matson 
© 2019 Steve Matson |
|
Phalaris paradoxa Hood canarygrass
non-native
Annual grass 
© 2024 Jennifer Mo 
© 2021 John Rawlings 
© 2017 James Bailey |
|
Pholistoma auritum var. auritum Blue fiesta flower, Blue fiestaflower, Fiesta flower
native
Annual herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Phoradendron villosum ssp. villosum Mistletoe
native
Shrub (parasitic) 
© 2022 David popp 
© 2020 R.A. Chasey 
© 2021 R.A. Chasey |
|
Pickeringia montana var. montana Montana chaparral pea
native
Shrub 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
|
Pinus attenuata Knobcone pine, Scrub pine
native
Tree 
© 2009 Ron Vanderhoff 
© 2018 Hayley Ross 
© 2019 Cynthia Powell |
|
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 
© 2022 Ron Vanderhoff 
© 2018 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Platystemon californicus Cream cups, Creamcups
native
Annual herb 
© 2017 Nathanial Wigington 
© 2022 John L. Thompson 
© 2022 John L. Thompson |
|
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 |
|
Polygonum aviculare Prostrate knotweed
non-native
Annual, Perennial herb 
© 2023 Ron Vanderhoff 
© 2023 Cynthia Powell 
© 2021 Ron Vanderhoff |
|
Polypodium californicum California polypody
native
Fern 
© 2020 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2023 Keir Morse |
|
Polypogon interruptus Ditch beard grass, Ditch rabbitsfoot grass
non-native
Perennial grass 
© 2022 John Rawlings 
© 2022 John Rawlings 
© 2020 Ron Vanderhoff |
|
Polypogon monspeliensis Annual beard grass, Rabbitsfoot grass
• invasive non-native
Annual grass 
© 2008 Steve Matson 
© 2014 Steve Matson 
© 2008 Steve Matson |
|
Polypogon viridis Water beard grass
non-native
Perennial grass 
© 2022 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2019 Friends of Five Creeks volunteers |
|
Populus trichocarpa Black cottonwood
native
Tree 
© 2019 Ron Vanderhoff 
© 2012 Steve Matson 
© 2021 Ron Vanderhoff |
|
Primula clevelandi [Dodecatheon clevelandii] Small Tree-Mallow
|
|
Prunus dulcis Domestic almond, Sweet almond
non-native
Tree 
© 2012 Wes Gray 
© 2024 Alaine Arslan 
© 2022 Donald Burk |
|
Prunus ilicifolia ssp. ilicifolia Holly leaf cherry, Hollyleaf cherry
native
Tree, Shrub 
© 2023 Helen Hancock 
© 2024 Mike Russler 
© 2022 Ron Vanderhoff |
|
Pseudognaphalium californicum Ladies' tobacco
native
Annual, Perennial herb 
© 2019 Gary McDonald 
© 2020 Steven M Norris 
© 2021 Ron Vanderhoff |
|
Pseudognaphalium luteoalbum Jersey cudweed
non-native
Annual herb 
© 2021 Ron Vanderhoff 
© 2019 Diane Etchison 
© 2015 Chris Jaster |
|
Pteridium aquilinum var. pubescens Hairy brackenfern, Western bracken fern
native
Fern 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2022 Bob Sweatt |
|
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 berberidifolia Inland scrub oak
native
Tree 
© 2022 David Strauch 
© 2024 Mike Russler 
© 2022 David Strauch |
|
Quercus durata var. durata Leather oak
native
Shrub 
© 2022 Ryan O'Dell 
© 2020 Charles Russell  © 2023 Emma Shelton |
|
Quercus lobata California white oak, Valley oak
native
Tree 
© 2023 Helen Hancock 
© 2021 Cynthia Powell 
© 2023 Ron Vanderhoff |
|
Rafinesquia californica California chicory, California plumseed
native
Annual herb 
© 2022 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2020 stephen rosenthal |
|
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 californica California wild rose, California wildrose
native
Shrub 
© 2022 Suzanne L. Weakley 
© 2022 Suzanne L. Weakley 
© 2025 Mike Russler |
|
Rubus armeniacus Himalayan blackberry, black berry, Armenian blackberry
• invasive non-native
Shrub 
© 2014 James Gonsman 
© 2018 Richard Spjut 
© 2013 Michael Mitchell |
|
Rubus ursinus California blackberry, Pacific blackberry
native
Vine, Shrub 
© 2018 Ken Lunders 
© 2019 Ron Vanderhoff 
© 2015 Kelli Kallenborn |
|
Rumex conglomeratus Clustered dock, Green dock
non-native
Perennial herb 
© 2020 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
Rumex crispus Curly dock, Curly leaved dock, Rhubarb
• invasive non-native
Perennial herb 
© 2018 Tim Lewis 
© 2019 Diane Etchison 
© 2023 Ron Vanderhoff |
|
Rumex pulcher Fiddle dock
non-native
Perennial herb 
© 2020 Ryan Carle 
© 2022 Chris McDonald 
© 2021 David popp |
|
Rumex salicifolius var. salicifolius Willow dock, Willow leaved dock
native
Perennial herb 
© 2023 Ron Vanderhoff 
© 2023 Ron Vanderhoff 
© 2023 Helen Hancock |
|
Rupertia physodes California tea, Common rupertia, Forest scurfpea
native
Perennial herb 
© 2021 Mary Ann Machi 
© 2023 Steve Conger 
© 2020 R.A. Chasey |
|
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 laevigata Polished willow, Red willow
native
Tree 
© 2024 Ron Vanderhoff 
© 2024 Ron Vanderhoff 
© 2017 Steve Matson |
|
Salix lasiandra var. lasiandra Pacific willow
native
Tree 
© 2021 Alice Cummings 
© 2021 Diane Renshaw 
© 2017 Ron Vanderhoff |
|
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 
© 2015 Garth Wadsworth |
|
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 crassicaulis Gamble weed, Pacific blacksnakeroot, Pacific sanicle
native
Perennial herb 
© 2023 Steve Conger 
© 2023 Steve Conger 
© 2021 Steve Laymon |
|
Sanicula hoffmannii Hoffmann's blacksnakeroot, Hoffmann's sanicle, Hoffmann's snakeroot
• rare native
Perennial herb 
© 2019 Ken Hickman 
© 2015 David Wolfson 
© 2024 Kyle Suchy |
|
Schinus molle Peruvian pepper tree, Peruvian peppertree
• invasive non-native
Tree 
© 2021 stephen rosenthal 
© 2017 William McCarey 
© 2023 Ron Vanderhoff |
|
Scirpus microcarpus Panicled bulrush, Small fruited bulrush
native
Perennial grasslike herb 
© 2022 Doug Allshouse 
© 2008 Steve Matson 
© 2013 Ron Vanderhoff |
|
Scrophularia californica ssp. californica California bee plant, California figwort
native
Perennial herb 
© 2020 Bob Sweatt 
© 2006 Steve Matson 
© 2019 Cynthia Powell |
|
Scutellaria tuberosa Danny's skullcap, Scullcap
native
Perennial herb 
© 2006 Steve Matson 
© 2006 Steve Matson 
© 2006 Steve Matson |
|
Selaginella bigelovii Bigelow's moss fern, Bigelow's spike moss, Bushy spikemoss
native
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2018 Ron Vanderhoff |
|
Senecio aphanactis California groundsel, Chaparral ragwort, Rayless ragwort
• rare native
Annual herb 
© 2023 Matt Berger 
© 2019 Matt Berger 
© 2023 Matt Berger |
|
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 |
|
Silene gallica Common catchfly, Windmill pink
non-native
Annual herb 
© 2019 Mary Wloch 
© 2017 Gary McDonald 
© 2019 Gary McDonald |
|
Silene laciniata ssp. californica California indian pink
native
Perennial herb 
© 2021 Timothy Boomer | WildMacro.com 
© 2016 Sue Graue 
© 2019 Zachary Snider |
|
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 
© 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 |
|
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 |
|
Stephanomeria virgata ssp. pleurocarpa Tall stephanomeria, Wand stephanomeria, Wand wirelettuce
native
Annual herb 
© 2021 Helen Hancock 
© 2023 R.A. Chasey 
© 2018 Richard Spjut |
|
Stipa lepida Foothill needle grass
native
Perennial grass 
© 2017 Gary McDonald 
© 2023 Ron Vanderhoff 
© 2024 Mel Letterman |
|
Stipa miliacea var. miliacea Smilo grass
• invasive non-native
Perennial grass 
© 2022 Donald Burk 
© 2022 Ron Vanderhoff 
© 2022 Donald Burk |
|
Stipa pulchra Purple needle grass
native
Perennial grass 
© 2019 Michelle Karle 
© 2008 Zoya Akulova 
© 2019 Ron Vanderhoff |
|
Streptanthus glandulosus ssp. glandulosus Bristly jewelflower
native
Annual herb 
© 2003 Keir Morse 
© 2020 Stacie Wolny 
© 2021 Bryant Baker |
|
Streptanthus lasiophyllus Small Tree-Mallow
|
|
Symphoricarpos mollis Creeping snowberry, Trailing snowberry
native
Shrub 
© 2022 Dana York 
© 2020 Cara Wilcox 
© 2019 Ron Vanderhoff |
|
Thalictrum fendleri var. polycarpum Fendler's meadow rue, Meadow rue, Torrey's meadow rue
native
Perennial herb 
© 2017 Thomas Reyes 
© 2019 Patrick Furtado 
© 2020 Diane Etchison |
|
Thysanocarpus laciniatus Common lace pod, Mountain fringepod, Narrow leaved fringe pod
native
Annual herb 
© 2021 Helen Hancock 
© 2023 Ron Vanderhoff 
© 2022 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 |
|
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. bifidum Pinole clover
native
Annual herb 
© 2020 Matt Berger 
© 2023 R.A. Chasey 
© 2020 Matt Berger |
|
Trifolium ciliolatum Foothill clover, Tree clover
native
Annual herb 
© 2005 Steve Matson 
© 2005 Steve Matson 
© 2019 Rachelle Gray |
|
Trifolium depauperatum var. amplectens Balloon sack clover, Pale bladder clover, Pale sack clover
native
Annual herb 
© 2018 David Greenberger 
© 2023 R.A. Chasey 
© 2018 David Greenberger |
|
Trifolium fragiferum Strawberry clover
non-native
Perennial herb 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2023 R.A. Chasey |
|
Trifolium fucatum Bull clover, Sour clover
native
Annual herb 
© 2014 Steve Matson 
© 2024 Mike Russler 
© 2025 Mike Russler |
|
Trifolium hirtum Rose clover
• invasive non-native
Annual herb 
© 2011 Steve Matson 
© 2011 Steve Matson 
© 2011 Steve Matson |
|
Trifolium microdon Thimble clover, Valparaiso clover
native
Annual herb 
© 2022 Dee Shea Himes 
© 2023 R.A. Chasey 
© 2025 Bill Kress |
|
Trifolium oliganthum Few flowered clover, Fewflower clover, Minitomcat clover
native
Annual herb 
© 2021 Mike Russler 
© 2022 Mary Merriman 
© 2023 R.A. Chasey |
|
Trifolium willdenovii Tomcat clover
native
Annual herb 
© 2024 Steve Conger 
© 2024 Steve Conger 
© 2018 Stacie Wolny |
|
Triodanis biflora Venus looking glass, Venus' looking glass
native
Annual herb 
© 2020 Ken Hickman 
© 2015 Hayley Ross 
© 2018 Ken Hickman |
|
Tropaeolum majus Garden nasturtium, Nasturtium
• invasive non-native
Annual herb, Vine 
© 2021 Julie A. Kierstead 
© 2024 Mike Russler 
© 2020 Jennifer Mo |
|
Turritis glabra Tower rockcress
native
Perennial herb 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
|
Typha domingensis Narrowleaf cattail, Southern cattail
native
Perennial herb 
© 2020 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2023 Ron Vanderhoff |
|
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 |
|
Urtica dioica ssp. holosericea Giant creek nettle, Hoary nettle, Mountain nettle
native
Perennial herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
|
Verbena lasiostachys var. lasiostachys Vervain, Western vervain
native
Perennial herb 
© 2010 Steve Matson 
© 2010 Steve Matson 
© 2019 Mary Conway |
|
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 |
|
Vicia villosa ssp. varia Smooth vetch, Thick fruited vetch, Winter vetch
non-native
Annual herb, Vine 
© 2019 Gary McDonald 
© 2017 Gary McDonald  © 2006 Steve Matson |
|
Viola pedunculata California golden violet, Johnny jump up
native
Perennial herb 
© 2014 Steve Matson 
© 2014 Steve Matson 
© 2014 Steve Matson |
