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Criteria:   found in Riverside County  •   is native  •  group by lifeform
3809  records include photos for these plants # number of sources
Scientific Name Common Name Lifeform #
  Lifeform: Annual1391 plants
  Lifeform: Biennial4 plants
  Lifeform: Perennial1588 plants
Abronia nana Dwarf sand verbena Perennial herb  
Abronia nana ssp. covillei Coville's dwarf abronia Perennial herb  
Abronia nana var. covillei Coville's dwarf sand verbena Perennial herb  
Abutilon palmeri Palmer's abutilon Perennial herb 16
Achillea millefolium Yarrow Perennial herb 70
Achnatherum coronatum Giant needlegrass Perennial grass 7
Achnatherum hymenoides Indian rice grass Perennial grass 8
Achnatherum latiglume Sierra needlegrass Perennial grass  
Achnatherum lemmonii ssp. lemmonii Lemmon's needlegrass Perennial grass  
Achnatherum lettermanii Letterman stipa Perennial grass 1
Achnatherum occidentale Western needlegrass Perennial grass 1
Achnatherum occidentale ssp. californicum California needlegrass Perennial grass  
Achnatherum occidentale ssp. occidentale Western needlegrass Perennial grass  
Achnatherum occidentale ssp. pubescens Elmer's needlegrass Perennial grass  
Achnatherum parishii Parish's needlegrass Perennial grass  
Achnatherum speciosum Desert needlegrass Perennial grass 8
Acleisanthes longiflora Angel trumpets Perennial herb  
Acmispon argophyllus Silver birds foot trefoil Perennial herb  
Acmispon argophyllus var. argophyllus Southern california silver lotus Perennial herb  
Acmispon argyraeus Canyon birdsfoot trefoil Perennial herb  
Acmispon argyraeus var. argyraeus Canyon lotus Perennial herb  
Acmispon glaber Deerweed Perennial herb 21
Acmispon glaber var. brevialatus Short winged deerweed Perennial herb  
Acmispon glaber var. glaber Deerweed Perennial herb  
Acmispon grandiflorus Large leaved lotus Perennial herb 4
Acmispon grandiflorus var. grandiflorus Chaparral lotus Perennial herb 1
Acmispon haydonii Pygmy lotus Perennial herb  
Acmispon heermannii Heermann's lotus Perennial herb 4
Acmispon heermannii var. heermannii Heermann's lotus Perennial herb 1
Acmispon heermannii var. orbicularis Round leaved heermann's lotus Perennial herb  
Acmispon nevadensis Sierra lotus Perennial herb  
Acmispon nevadensis var. davidsonii Davidson's sierra nevada lotus Perennial herb  
Acmispon nevadensis var. nevadensis Sierra nevada lotus Perennial herb  
Acmispon procumbens Silky california broom Perennial herb, Shrub  
Acmispon procumbens var. procumbens Silky california broom Perennial herb, Shrub  
Acmispon rigidus Desert lotus Perennial herb  
Acourtia microcephala Sacapellote Perennial herb 1
Adenophyllum cooperi Cooper's dogweed Perennial herb  
Adenophyllum porophylloides San felipe dogweed Perennial herb  
Agastache urticifolia Horse mint Perennial herb 6
Agave deserti Desert agave Perennial herb 10
Agave deserti var. deserti Desert agave Perennial herb 1
Agoseris grandiflora Giant mountain dandelion Perennial herb 3
Agoseris grandiflora var. grandiflora Giant mountain dandelion Perennial herb  
Agoseris retrorsa Spear leaved agoseris Perennial herb 1
Agrostis exarata Bentgrass Perennial grass 5
Agrostis humilis Mountain bent grass Perennial grass  
Agrostis idahoensis Colonial bentgrass Perennial grass 3
Agrostis oregonensis Oregon bentgrass Perennial grass  
Agrostis pallens Diego bent grass Perennial grass 14
Agrostis scabra Rough bentgrass Perennial grass 4
Agrostis thurberiana Thurber's bentgrass Perennial grass  
Agrostis variabilis Mountain bentgrass Perennial grass  
Alisma plantago-aquatica Water plantain Perennial herb (aquatic) 5
Alisma triviale Northern water plantain Perennial herb (aquatic) 5
Allionia incarnata Windmills Perennial herb  
Allionia incarnata var. incarnata Trailing windmills Perennial herb  
Allium atrorubens Dark red onion Perennial herb (bulb)  
Allium atrorubens var. cristatum Crested onion Perennial herb (bulb)  
Allium burlewii Burlew's onion Perennial herb (bulb) 1
Allium campanulatum Dusky onion Perennial herb (bulb) 2
Allium cratericola Cascade onion Perennial herb (bulb) 2
Allium denticulatum Toothed wild onion Perennial herb (bulb)  
Allium fimbriatum Wild onion Perennial herb (bulb) 1
Allium fimbriatum var. fimbriatum Fringed onion Perennial herb (bulb)  
Allium haematochiton Red skinned onion Perennial herb (bulb) 5
Allium lacunosum Pitted onion Perennial herb (bulb)  
Allium lacunosum var. davisiae Davis' pitted onion Perennial herb (bulb)  
Allium lacunosum var. kernense Kern onion Perennial herb (bulb)  
Allium lacunosum var. lacunosum Pitted onion Perennial herb (bulb)  
Allium lacunosum var. micranthum White fringed onion Perennial herb (bulb)  
Allium marvinii Yucaipa onion Perennial herb (bulb) 5
Allium monticola San bernardino mountain onion Perennial herb (bulb)  
Allium munzii Munz's onion Perennial herb (bulb)  
Allium parishii Wild onion Perennial herb (bulb)  
Allium parryi Parry's fringed onion Perennial herb (bulb)  
Allium peninsulare Mexicali onion Perennial herb (bulb)  
Allium peninsulare var. peninsulare Mexicali onion Perennial herb (bulb)  
Allium praecox Early onion Perennial herb (bulb) 3
Allium tribracteatum Three bracted onion Perennial herb (bulb)  
Allium unifolium One leaf onion Perennial herb (bulb) 15
Almutaster pauciflorus Alkali marsh aster Perennial herb  
Alopecurus aequalis Sonoma alopecurus Perennial grass  
Amauriopsis dissecta Ragged leaf bahia Perennial herb  
Ambrosia Xplatyspina Perennial herb  
Ambrosia confertiflora Weak leaved burweed Perennial herb  
Ambrosia psilostachya Ragweed Perennial herb 7
Ambrosia pumila San diego ambrosia Perennial herb (rhizomatous) 3
Ambrosia salsola var. fasciculata Burrobrush Perennial herb  
Amsonia tomentosa Gray amsonia Perennial herb  
Anaphalis margaritacea Pearly everlasting Perennial herb 18
Andropogon glomeratus Bushy bluestem Perennial grass 2
Andropogon glomeratus var. pumilus Bushy bluestem Perennial grass  
Andropogon glomeratus var. scabriglumis Beardgrass Perennial grass  
Androstephium breviflorum Small flowered androstephium Perennial herb (bulb)  
Anemone tuberosa Tuber anemone Perennial herb 1
Anemopsis californica Yerba mansa Perennial herb 31
Angelica capitellata Grayswamp whiteheads Perennial herb 2
Angelica tomentosa Woolly angelica Perennial herb 1
Antennaria argentea Silvery everlasting Perennial herb  
Antennaria microphylla Littleleaf pussytoes Perennial herb 5
Antennaria rosea Rosy everlasting Perennial herb 2
Antennaria rosea ssp. confinis Rosy pussytoes Perennial herb  
Antennaria rosea ssp. rosea Rosy pussytoes Perennial herb  
Antirrhinum confertiflorum Ghost flower Perennial herb  
Antirrhinum virga Tall snapdragon Perennial herb  
Aphyllon californicum California orobanche Perennial herb (parasitic)  
Aphyllon californicum ssp. feudgei California broomrape Perennial herb (parasitic)  
Aphyllon cooperi Burroweed strangler Perennial herb (parasitic)  
Aphyllon fasciculatum Clustered broomrape Perennial herb (parasitic)  
Aphyllon parishii Parish's broom rape Perennial herb (parasitic)  
Aphyllon parishii ssp. parishii Parish broomrape Perennial herb (parasitic)  
Aphyllon tuberosum Chaparral broomrape Perennial herb (parasitic)  
Apocynum androsaemifolium Spreading dogbane Perennial herb 1
Apocynum cannabinum Indian hemp Perennial herb 11
Aquilegia formosa Columbine Perennial herb 55
Arabis dispar Pinyon rock cress Perennial herb  
Arabis glabra Smooth rock cress Perennial herb  
Arabis glabra var. furcatipilis Smooth rock cress Perennial herb  
Arabis glaucovalvula Blue podded rock cress Perennial herb  
Arabis hirshbergiae Cuyamaca rockcress Perennial herb  
Arabis holboellii Holboell's rock cress Perennial herb  
Arabis holboellii var. pendulocarpa Weeping fruited holboell's rock cress Perennial herb  
Arabis holboellii var. pinetorum Pine rockcress Perennial herb  
Arabis holboellii var. retrofracta Backward splitting holboell's rock cress Perennial herb  
Arabis inyoensis Inyo rock cress Perennial herb  
Arabis johnstonii Johnston's rock cress Perennial herb  
Arabis parishii Parish's rock cress Perennial herb  
Arabis perennans Rock cress Perennial herb  
Arabis platysperma Broad seeded rock cress Perennial herb  
Arabis pulchra Prince s rock cress Perennial herb 2
Arabis pulchra var. gracilis Slender & beautiful rock cress Perennial herb  
Arabis pulchra var. munciensis Darwin rock cress Perennial herb  
Arabis pulchra var. pulchra Beautiful rock cress Perennial herb 2
Arabis repanda Repand rock cress Perennial herb  
Arabis repanda var. greenei Greene's rock cress Perennial herb  
Arabis repanda var. repanda Repand rock cress Perennial herb  
Arabis sparsiflora Sicklepod rock cress Perennial herb 2
Arabis sparsiflora var. arcuata Elegant rockress Perennial herb  
Arabis sparsiflora var. californica California elegant rock cress Perennial herb 1
Arabis sparsiflora var. sparsiflora Elegant rock cress Perennial herb 2
Aralia californica California spikenard Perennial herb 18
Arceuthobium abietinum Fir dwarf mistletoe Perennial herb (parasitic)  
Arceuthobium californicum Sugar pine dwarf mistletoe Perennial herb (parasitic)  
Arceuthobium campylopodum Pine dwarf mistletoe Perennial herb (parasitic)  
Arceuthobium cyanocarpum Blue berry dwarf mistletoe Perennial herb (parasitic)  
Arceuthobium divaricatum Western dwarf mistletoe Perennial herb (parasitic)  
Arceuthobium littorum Seashore dwarf mistletoe Perennial herb (parasitic)  
Arceuthobium monticola Mountain dwarf mistletoe Perennial herb (parasitic)  
Arceuthobium occidentale Digger pine dwarf mistletoe Perennial herb (parasitic)  
Arceuthobium siskiyouense Siskiyou dwarf mistletoe Perennial herb (parasitic)  
Arceuthobium tsugense Hemlock dwarf mistletoe Perennial herb (parasitic)  
Arceuthobium tsugense ssp. mertensianae Mountain hemlock dwarf mistletoe Perennial herb (parasitic)  
Arceuthobium tsugense ssp. tsugense Hemlock dwarf mistletoe Perennial herb (parasitic)  
Arenaria macradenia Sandwort Perennial herb  
Arenaria macradenia ssp. ferrisiae Ferris' sandwort Perennial herb  
Arenaria macradenia var. macradenia Desert sandwort Perennial herb  
Argemone corymbosa Leafy prickly poppy Perennial herb 2
Aristida californica California threeawn Perennial grass  
Aristida californica var. californica California three aw Perennial grass  
Aristida divaricata Poverty three awn Perennial grass  
Aristida purpurea Purple three awn Perennial grass 18
Aristida purpurea var. fendleriana Fendler three awn Perennial grass  
Aristida purpurea var. longiseta Red three awn Perennial grass 2
Aristida purpurea var. nealleyi Reverchon three awn Perennial grass  
Aristida purpurea var. parishii Parish three awn Perennial grass  
Aristida purpurea var. purpurea Purple three awn Perennial grass 2
Aristida purpurea var. wrightii Wright three awn Perennial grass  
Aristida ternipes Spidergrass Perennial grass 2
Aristida ternipes var. gentilis Spidergrass Perennial grass 2
Arnica chamissonis Chamisso arnica Perennial herb 6
Arnica mollis Cordilleran arnica Perennial herb 1
Artemisia douglasiana California mugwort Perennial herb 34
Artemisia dracunculus Tarragon Perennial herb 11
Artemisia ludoviciana Silver wormwood Perennial herb 17
Artemisia ludoviciana ssp. albula White hugwort Perennial herb 1
Artemisia ludoviciana ssp. incompta Western mugwort Perennial herb  
Artemisia ludoviciana ssp. ludoviciana Silver wormwood Perennial herb 3
Arthrocnemum subterminale Parish's glasswort Perennial herb 4
Asclepias asperula Spider milkweed Perennial herb 3
Asclepias californica California milkweed Perennial herb 8
Asclepias eriocarpa Indian milkweed Perennial herb 9
Asclepias erosa Desert milkweed Perennial herb 3
Asclepias fascicularis narrow leaf milkweed Perennial herb 31
Asclepias subulata Ajamete Perennial herb 8
Asclepias vestita Woolly milkweed Perennial herb  
Aster alpigenus var. andersonii Alpine aster Perennial herb 1
Aster ascendens Long leaved aster Perennial herb  
Aster bernardinus San bernardino aster Perennial herb  
Aster chilensis California aster Perennial herb 40
Aster foliaceus Leafy aster Perennial herb 1
Aster lanceolatus ssp. hesperius Western lance leaf aster Perennial herb  
Aster occidentalis Western mountain aster Perennial herb 1
Aster occidentalis var. occidentalis Western mountain aster Perennial herb  
Aster pauciflorus Marsh alkali aster Perennial herb  
Astragalus allochrous Halfmoon milkvetch Perennial herb  
Astragalus bernardinus San bernardino milk vetch Perennial herb  
Astragalus bicristatus Crested milk vetch Perennial herb  
Astragalus coccineus Scarlet milk vetch Perennial herb 1
Astragalus crotalariae Salton milk vetch Perennial herb  
Astragalus douglasii Douglas's milkvetch Perennial herb  
Astragalus douglasii var. douglasii Douglas's milkvetch Perennial herb  
Astragalus douglasii var. parishii Parish's milk vetch Perennial herb  
Astragalus filipes Narrow pod locoweed Perennial herb  
Astragalus layneae Layne's milk vetch Perennial herb  
Astragalus leucolobus Big bear valley woollypod Perennial herb  
Astragalus magdalenae Satiny milkvetch Perennial herb  
Astragalus magdalenae var. peirsonii Peirson's milk vetch Perennial herb  
Astragalus miguelensis San miguel island milkvetch Perennial herb  
Astragalus obscurus Basalt milk vetch Perennial herb  
Astragalus oocarpus San diego milk vetch Perennial herb  
Astragalus pachypus Thick pod milk vetch Perennial herb  
Astragalus palmeri Palmer locoweed Perennial herb  
Astragalus pomonensis Pomona milk vetch Perennial herb 4
Astragalus preussii Preuss's milk vetch Perennial herb  
Astragalus preussii var. laxiflorus Lancaster milk vetch Perennial herb  
Astragalus purshii Pursh's sheeppod Perennial herb 3
Astragalus purshii var. tinctus Pursh's milk vetch Perennial herb 1
Astragalus tricarinatus Triple ribbed milk vetch Perennial herb  
Astragalus trichopodus Santa barbara milk vetch Perennial herb 3
Astragalus trichopodus var. lonchus Southern california milkvetch Perennial herb 1
Astragalus trichopodus var. phoxus Santa barbara milk vetch Perennial herb 1
Astragalus trichopodus var. trichopodus Santa barbara milk vetch Perennial herb 1
Atriplex coulteri Coulter's saltbush Perennial herb  
Ayenia compacta Desert ayenia Perennial herb, Shrub  
Baccharis douglasii Salt marsh baccharis Perennial herb 14
Baccharis glutinosa Salt Marsh baccharis Perennial herb 27
Bahia dissecta Ragged leaf bahia Perennial herb  
Baileya multiradiata Desert marigold Perennial herb 20
Baileya multiradiata var. multiradiata Wild marigold Perennial herb 20
Barbarea orthoceras Winter cress Perennial herb 1
Berula erecta Cut leaved water parsnip Perennial herb 1
Bidens laevis Bur marigold Perennial herb 4
Bistorta bistortoides American bistort Perennial herb  
Bloomeria clevelandii San diego goldenstar Perennial herb  
Bloomeria crocea Golden stars Perennial herb 10
Bloomeria crocea var. crocea Common goldenstar Perennial herb 1
Bloomeria crocea var. montana Mountain goldenstar Perennial herb  
Boechera arcuata Arching rockcress Perennial herb  
Boechera californica California rockcress Perennial herb 1
Boechera dispar Pinyon rock cress Perennial herb  
Boechera divaricarpa Spreadingpod rockcress Perennial herb  
Boechera glaucovalvula Bluepod rockcress Perennial herb  
Boechera hirshbergiae Hirshberg's rockcress Perennial herb  
Boechera inyoensis Inyo rockcress Perennial herb  
Boechera johnstonii Johnston's rockcress Perennial herb  
Boechera lincolnensis Lincoln rockcress Perennial herb  
Boechera parishii Parish's rock cress Perennial herb  
Boechera pendulocarpa Dropseed rockcress Perennial herb  
Boechera perennans Perennial rockcress Perennial herb  
Boechera pinetorum Woodland rockcress Perennial herb  
Boechera platysperma Pioneer rockcress Perennial herb  
Boechera pulchra Beautiful rockcress Perennial herb 2
Boechera repanda Yosemite rockcress Perennial herb  
Boechera retrofracta Reflexed rockcress Perennial herb  
Boechera sparsiflora Sicklepod rockcress Perennial herb 2
Boechera xylopoda Bigfoot hybrid rockcress Perennial herb  
Boerhavia coccinea Red boerhaavia Perennial herb  
Bolboschoenus maritimus Alkali bulrush Perennial grass 16
Bolboschoenus maritimus ssp. paludosus Saltmarsh bulrush Perennial grass 16
Bolboschoenus robustus Sturdy bullrush Perennial grass 10
Boschniakia strobilacea Ground cone Perennial herb (parasitic)  
Bothriochloa barbinodis Beard grass Perennial grass 6
Bouteloua curtipendula Side oats grama Perennial grass 16
Bouteloua curtipendula var. caespitosa Side oats grama Perennial grass  
Bouteloua eriopoda Black grama Perennial grass  
Bouteloua gracilis Blue grama Perennial grass 35
Bouteloua trifida Red grama Perennial grass  
Boykinia rotundifolia Round leaved boykinia Perennial herb 1
Brandegea bigelovii Brandegea Perennial herb  
Brickellia californica California brickellia Perennial herb 15
Brickellia californica var. californica California brickellbush Perennial herb 2
Brickellia oblongifolia Mojave brickellbush Perennial herb  
Brickellia oblongifolia var. linifolia Pinon brickellia Perennial herb  
Brodiaea coronaria Harvest brodiaea Perennial herb (bulb) 3
Brodiaea filifolia Thread leaved brodiaea Perennial herb (bulb) 2
Brodiaea jolonensis Jolon brodiaea Perennial herb 1
Brodiaea orcuttii Orcutt's brodiaea Perennial herb (bulb)  
Brodiaea santarosae Santa Rosa basalt brodiaea Perennial herb  
Brodiaea terrestris Dwarf brodiaea Perennial herb 1
Brodiaea terrestris ssp. kernensis Kern dwarf brodiaea Perennial herb  
Brodiaea terrestris ssp. terrestris Dwarf brodiaea Perennial herb  
Bromus anomalus Nodding brome Perennial grass 1
Bromus carinatus California bromegrass Perennial grass 19
Bromus carinatus var. carinatus California brome Perennial grass 19
Bromus carinatus var. marginatus Mountain brome Perennial grass 6
Bromus carinatus var. maritimus Seaside brome Perennial grass 1
Bromus ciliatus Fringed bromegrass Perennial grass 2
Bromus ciliatus var. ciliatus Fringed brome Perennial grass  
Bromus grandis Tall brome Perennial grass  
Bromus hallii Hall's brome Perennial grass  
Bromus laevipes Narrow flowered brome Perennial grass 3
Bromus marginatus Mountain brome Perennial grass 6
Bromus maritimus Maritime brome Perennial grass 1
Bromus porteri Nodding brome Perennial grass 1
Bromus pseudolaevipes Southern chinook brome Perennial grass  
Bromus richardsonii Fringed brome Perennial grass  
Bromus sitchensis Sitka brome Perennial grass 2
Bromus sitchensis var. carinatus California brome Perennial grass 19
Bromus sitchensis var. marginatus Mountain brome Perennial grass 6
Bromus sitchensis var. maritimus Maritime brome Perennial grass 1
Bromus sitchensis var. sitchensis Sitka brome, alaska brome Perennial grass  
Calamagrostis koelerioides Fire reedgrass Perennial grass  
Callitriche heterophylla Water starwort Perennial herb  
Callitriche longipedunculata Longstock water-starwort Perennial herb  
Calochortus albus White fairy lantern Perennial herb 6
Calochortus catalinae Catalina mariposa Perennial herb (bulb) 3
Calochortus concolor Golden bowl mariposa Perennial herb 1
Calochortus excavatus Inyo County star tulip Perennial herb (bulb)  
Calochortus flexuosus Winding mariposa Perennial herb  
Calochortus invenustus Plain mariposa Perennial herb 2
Calochortus kennedyi Desert mariposa Perennial herb 1
Calochortus kennedyi var. kennedyi Red mariposa Perennial herb  
Calochortus palmeri Strangling mariposa Perennial herb 1
Calochortus palmeri var. munzii Munz's mariposa lily Perennial herb (bulb) 1
Calochortus palmeri var. palmeri Palmer's mariposa lily Perennial herb (bulb) 1
Calochortus plummerae Plummer's mariposa lily Perennial herb (bulb) 1
Calochortus splendens Splendid mariposa Perennial herb 4
Calochortus striatus Alkali mariposa lily Perennial herb (bulb) 1
Calochortus venustus Butterfly mariposa lily Perennial herb 6
Calochortus weedii Weed's mariposa Perennial herb 1
Calochortus weedii var. intermedius Intermediate mariposa lily Perennial herb (bulb) 1
Calochortus weedii var. weedii Weed's mariposa Perennial herb 1
Calyptridium monospermum One seeded pussypaws Perennial herb  
Calystegia longipes Piute morning glory Perennial herb 1
Calystegia macrostegia Island morning glory Perennial herb, Vine 18
Calystegia macrostegia ssp. amplissima Island morning glory Perennial herb  
Calystegia macrostegia ssp. arida Southern california morning glory Perennial herb, Vine  
Calystegia macrostegia ssp. cyclostegia Coast morning glory Perennial herb, Vine 3
Calystegia macrostegia ssp. intermedia South coast morning glory Perennial herb, Vine  
Calystegia macrostegia ssp. macrostegia Island morning glory Perennial herb, Vine 2
Calystegia macrostegia ssp. tenuifolia San diego morning glory Perennial herb, Vine  
Calystegia occidentalis Bush morning glory Perennial herb 1
Calystegia occidentalis ssp. fulcrata Sonora morning glory Perennial herb  
Calystegia purpurata Smooth western morning glory Perennial herb 4
Calystegia purpurata ssp. purpurata Smooth western morning glory Perennial herb 1
Calystegia sepium Western hedge bindweed Perennial herb 1
Calystegia sepium ssp. binghamiae Santa barbara morning glory Perennial herb (rhizomatous)  
Calystegia sepium ssp. limnophila Marsh morning glory Perennial herb  
Campanula californica Swamp harebell Perennial herb (rhizomatous)  
Cardamine californica milkmaids Perennial herb  
Cardamine californica var. californica Milk maids Perennial herb  
Cardamine californica var. integrifolia California toothwort Perennial herb  
Cardionema ramosissimum Sand mat Perennial herb 2
Carex abrupta Abrupt beaked sedge Perennial grass  
Carex albida White sedge Perennial grass (rhizomatous)  
Carex alma Sedge Perennial grass  
Carex amplectens Clasping bract sedge Perennial grass 1
Carex athrostachya Slender leaved sedge Perennial grass 2
Carex barbarae Valley sedge Perennial grass 24
Carex bella Southwestern showy sedge Perennial grass  
Carex bolanderi Bolander's sedge Perennial grass  
Carex buxbaumii Buxbaum's sedge Perennial grass  
Carex densa Sedge Perennial grass 8
Carex diandra Lesser panicled sedge Perennial grass 1
Carex douglasii Douglas sedge Perennial grass 1
Carex dudleyi Dudley's sedge Perennial grass 8
Carex fracta Fragile sheathed sedge Perennial grass 1
Carex garberi Garber's sedge Perennial grass  
Carex globosa Round fruit sedge Perennial grass 5
Carex hassei Hasse's sedge Perennial grass  
Carex heteroneura Variable nerved sedge Perennial grass  
Carex heteroneura var. heteroneura Vari nerved sedge Perennial grass  
Carex hoodii Hood's sedge Perennial grass  
Carex illota Sheep sedge Perennial grass  
Carex jonesii Jones' sedge Perennial grass  
Carex lemmonii Lemmon's sedge Perennial grass  
Carex lenticularis var. lipocarpa Fat fruited sedge Perennial grass 1
Carex mariposana Mariposa sedge Perennial grass  
Carex multicaulis Forest sedge Perennial grass  
Carex multicostata Many ribbed sedge Perennial grass  
Carex nebrascensis Nebraska sedge Perennial grass 2
Carex occidentalis Western sedge Perennial grass  
Carex pellita Woolly sedge Perennial grass 7
Carex phaeocephala Mountain hare sedge Perennial grass  
Carex praegracilis Field sedge Perennial grass 28
Carex preslii Presl's sedge Perennial grass 1
Carex rossii Ross' sedge Perennial grass 1
Carex sartwelliana Yosemite sedge Perennial grass  
Carex schottii Schott's sedge Perennial grass  
Carex senta Rough sedge Perennial grass 3
Carex specifica Narrow fruit sedge Perennial grass  
Carex spissa San Diego sedge Perennial grass 14
Carex subfusca Brown sedge Perennial grass 8
Carex triquetra Triangular fruit sedge Perennial grass  
Castilleja affinis Indian paintbrush Perennial herb 1
Castilleja affinis ssp. affinis Coast indian paintbrush Perennial herb 1
Castilleja angustifolia Desert paintbrush Perennial herb 3
Castilleja applegatei Wavy leaf paintbrush Perennial herb 2
Castilleja applegatei ssp. martinii Martin's paintbrush Perennial herb 1
Castilleja chromosa Desert paintbrush Perennial herb 3
Castilleja foliolosa Texas paintbrush Perennial herb 3
Castilleja inflata Indian paintbrush Perennial herb  
Castilleja linariifolia Desert paintbursh Perennial herb 2
Castilleja miniata Great red paintbrush Perennial herb 6
Castilleja miniata ssp. miniata Scarlet indian paintbrush Perennial herb  
Castilleja plagiotoma Mojave indian paintbrush Perennial herb (hemiparasitic)  
Castilleja pruinosa Frosted paintbrush Perennial herb (hemiparasitic)  
Castilleja subinclusa Franciscan paint brush Perennial herb 1
Castilleja subinclusa ssp. subinclusa Long leaf paintbrush Perennial herb 1
Caulanthus major Slender wild cabbage Perennial herb  
Ceratophyllum demersum Hornwort Perennial herb 1
Chaenactis parishii Parish's chaenactis Perennial herb  
Chaenactis santolinoides Santolina chaenactis Perennial herb  
Chamaesyce albomarginata Rattlesnake weed Perennial herb  
Chamaesyce arizonica Arizona spurge Perennial herb  
Chamaesyce melanadenia Spurge Perennial herb  
Chamaesyce parishii Parish's spurge Perennial herb  
Chamaesyce pediculifera Carrizo mountain spurge Perennial herb  
Chamaesyce polycarpa Small seeded spurge Perennial herb  
Chamaesyce polycarpa var. hirtella Hairy small seeded spurge Perennial herb  
Chamaesyce polycarpa var. polycarpa Small seeded spurge Perennial herb  
Chamaesyce vallis-mortae Death valley spurge Perennial herb  
Chamerion angustifolium Fireweed Perennial herb 14
Chamerion angustifolium ssp. circumvagum Fireweed Perennial herb 2
Chenopodium californicum California goosefoot Perennial herb 1
Chenopodium incanum Mealy goosefoot Perennial herb  
Chenopodium incanum var. occidentale Pigweed Perennial herb  
Chimaphila menziesii Little prince's pine Perennial herb  
Chimaphila umbellata Blake's prince's pine Perennial herb  
Chloracantha spinosa Spiny chloracantha Perennial herb  
Chloracantha spinosa var. spinosa Spiny goldenbush Perennial herb  
Chlorogalum parviflorum Small flowered soaproot Perennial herb  
Chlorogalum pomeridianum Amole Perennial herb 18
Chlorogalum pomeridianum var. pomeridianum Common soaproot Perennial herb 2
Chrysothamnus paniculatus Blackbanded rabbit brush Perennial herb 1
Cicuta douglasii Western water hemlock Perennial herb 1
Cirsium congdonii Congdon's thistle Perennial herb  
Cirsium hydrophilum Suisun thistle Perennial herb  
Cirsium hydrophilum var. hydrophilum Suisun thistle Perennial herb  
Cirsium mohavense Mohave thistle Perennial herb  
Cirsium neomexicanum Desert thistle Perennial herb  
Cirsium occidentale Western thistle Perennial herb 9
Cirsium occidentale var. californicum California thistle Perennial herb  
Cirsium occidentale var. coulteri Coulter's thistle Perennial herb  
Cirsium occidentale var. occidentale Cobweb thistle Perennial herb 1
Cirsium occidentale var. venustum Venus thistle Perennial herb  
Cirsium scariosum Elk thistle Perennial herb  
Cirsium scariosum var. citrinum Southern meadow thistle Perennial herb  
Cirsium scariosum var. congdonii Elk thistle Perennial herb  
Cirsium scariosum var. loncholepis La graciosa thistle Perennial herb  
Cladium californicum Saw grass Perennial grass  
Clematis lasiantha Pipestem Perennial herb, Vine 26
Clematis ligusticifolia Creek clematis Perennial herb, Vine 32
Clematis pauciflora Virgin's bower Perennial herb, Vine 1
Clinopodium chandleri San miguel savory Perennial herb 6
Corallorhiza maculata Summer coral root Perennial herb  
Corethrogyne filaginifolia Common sandaster Perennial herb 9
Corethrogyne filaginifolia var. filaginifolia Common sandaster Perennial herb 12
Coryphantha alversonii Foxtail cactus Perennial herb (stem succulent)  
Cressa truxillensis Alkali weed Perennial herb 3
Croton californicus Desert croton Perennial herb 5
Cryptantha flavoculata Rough seed cryptantha Perennial herb  
Cryptantha racemosa Woody forget me not Perennial herb  
Cucurbita digitata Finger leaved gourd Perennial herb, Vine  
Cucurbita foetidissima Missouri gourd Perennial herb, Vine 4
Cylindropuntia Xmunzii Munz's cholla Perennial herb (stem succulent) 2
Cylindropuntia acanthocarpa Buck horn cholla Perennial herb (stem succulent) 4
Cylindropuntia acanthocarpa var. acanthocarpa Buckhorn cholla Perennial herb (stem succulent) 3
Cylindropuntia californica California cholla Perennial herb (stem succulent) 5
Cylindropuntia californica var. californica California pricklypear Perennial herb (stem succulent) 1
Cylindropuntia californica var. parkeri Brownspined pricklypear Perennial herb (stem succulent) 1
Cylindropuntia chuckwallensis Chuckwalla cholla Perennial herb (stem succulent)  
Cylindropuntia ganderi Gander's buckhorn cholla Perennial herb (stem succulent)  
Cylindropuntia munzii Munz's cholla Perennial herb (stem succulent) 2
Cymopterus multinervatus Arizona cymopterus Perennial herb  
Cymopterus panamintensis Panamint indian parsnip Perennial herb  
Cymopterus panamintensis var. acutifolius Panamint indian parsnip Perennial herb  
Cynanchum utahense Vine milkweed Perennial herb  
Cyperus eragrostis Tall cyperus Perennial grass 13
Cyperus esculentus Nut grass Perennial grass  
Cyperus laevigatus Smooth cyperus Perennial grass  
Cyperus niger Brown cyperus Perennial grass  
Cyperus parishii Parish's flatsedge Perennial grass  
Dalea mollis Silky dalea Perennial herb  
Dalea mollissima Silky dalea Perennial herb  
Danthonia unispicata One spiked oatgrass Perennial grass  
Dasyochloa pulchella Low woollygrass Perennial grass  
Datisca glomerata Durango root Perennial herb 2
Datura inoxia ! Pricklyburr Perennial herb 6
Datura wrightii Jimsonweed Perennial herb 15
Delphinium cardinale Scarlet larkspur Perennial herb 8
Delphinium hesperium Western larkspur Perennial herb 1
Delphinium hesperium ssp. cuyamacae Cuyamaca larkspur Perennial herb  
Delphinium hesperium ssp. pallescens Western larkspur Perennial herb 1
Delphinium nuttallianum Nuttall's larkspur Perennial herb 2
Delphinium parishii Parish's larkspur Perennial herb  
Delphinium parishii ssp. parishii Parish's larkspur Perennial herb  
Delphinium parishii ssp. subglobosum Intermediate larkspur Perennial herb  
Delphinium parryi San bernardino larkspur Perennial herb 1
Delphinium parryi ssp. maritimum Seaside larkspur Perennial herb  
Delphinium parryi ssp. parryi San bernardino larkspur Perennial herb  
Delphinium parryi ssp. purpureum Mt. pinos larkspur Perennial herb  
Delphinium patens Spreading larkspur Perennial herb  
Delphinium patens ssp. hepaticoideum Spreading larkspur Perennial herb  
Delphinium patens ssp. montanum Spreading larkspur Perennial herb  
Delphinium patens ssp. patens Spreading larkspur Perennial herb  
Deschampsia elongata Hairgrass Perennial grass 17
Descurainia adenophora White tansy mustard Perennial herb  
Descurainia californica Sierra tansy mustard Perennial herb  
Descurainia incana Mountain tansy mustard Perennial herb  
Descurainia obtusa Blunt tansymustard Perennial herb  
Descurainia obtusa ssp. adenophora White tansy mustard Perennial herb  
Dicentra chrysantha Golden eardrops Perennial herb 5
Dicentra formosa Pacific bleedinghearts Perennial herb 24
Dicentra formosa ssp. formosa Bleeding heart Perennial herb 2
Dicentra ochroleuca Yellow bleeding heart Perennial herb  
Dichelostemma capitatum Blue dicks Perennial herb 15
Dichelostemma capitatum ssp. capitatum Wild hyacinth Perennial herb 2
Dichelostemma capitatum ssp. pauciflorum Few flowered blue dicks Perennial herb  
Dichondra donelliana Dichondra Perennial herb, Vine 5
Dieteria asteroides Hoary aster Perennial herb  
Dieteria asteroides var. asteroides Hoary aster Perennial herb  
Dieteria canescens Hoary aster Perennial herb 1
Dieteria canescens var. canescens Hoary aster Perennial herb  
Dieteria canescens var. ziegleri Ziegler's aster Perennial herb  
Diplacus clevelandii Cleveland's bush monkeyflower Perennial herb 2
Dipterostemon capitatus Blue dicks Perennial herb 15
Dipterostemon capitatus ssp. capitatus Perennial herb 2
Distichlis spicata Salt grass Perennial grass 25
Ditaxis californica California ditaxis Perennial herb  
Ditaxis clariana Glandular ditaxis Perennial herb  
Ditaxis claryana Glandular ditaxis Perennial herb  
Ditaxis lanceolata Lance leaved ditaxis Perennial herb  
Ditaxis serrata var. californica California ditaxis Perennial herb  
Dithyrea maritima Beach spectaclepod Perennial herb (rhizomatous)  
Dodecatheon alpinum Alpine shooting star Perennial herb 1
Dodecatheon clevelandii Padre's shooting star Perennial herb 8
Dodecatheon clevelandii ssp. clevelandii Cleveland's shooting star Perennial herb  
Dodecatheon jeffreyi Jeffrey's shooting star Perennial herb 3
Dodecatheon redolens Scented shooting star Perennial herb  
Draba corrugata Southern california draba Perennial herb  
Draba corrugata var. corrugata Southern california draba Perennial herb  
Draba corrugata var. saxosa Southern california rock draba Perennial herb  
Draba saxosa Southern california rock draba Perennial herb  
Drymocallis cuneifolia Perennial herb  
Drymocallis cuneifolia var. ewanii Ewan's cinquefoil Perennial herb  
Drymocallis glandulosa Sticky cinquefoil Perennial herb 11
Drymocallis glandulosa var. glandulosa Sticky cinquefoil Perennial herb  
Drymocallis glandulosa var. reflexa Sticky cinquefoil Perennial herb  
Drymocallis glandulosa var. viscida Sticky cinquefoil Perennial herb  
Drymocallis glandulosa var. wrangelliana Sticky cinquefoil Perennial herb  
Drymocallis hansenii Yosemite woodbeauty Perennial herb  
Drymocallis lactea Perennial herb 1
Drymocallis lactea var. lactea Sierran woodbeauty Perennial herb  
Dudleya abramsii Abrams' dudleya Perennial herb 2
Dudleya abramsii ssp. abramsii Abrams' dudleya Perennial herb 1
Dudleya alainae Banner dudleya Perennial herb 1
Dudleya arizonica Arizona chalk dudleya Perennial herb 1
Dudleya cymosa Rock lettuce Perennial herb 19
Dudleya cymosa ssp. pumila Low canyon dudleya Perennial herb 2
Dudleya edulis Fingertips Perennial herb 9
Dudleya lanceolata Southern california dudleya Perennial herb 14
Dudleya multicaulis Many stemmed dudleya Perennial herb  
Dudleya pulverulenta Chalk dudleya Perennial herb 15
Dudleya pulverulenta ssp. arizonica Arizona chalk dudleya Perennial herb 1
Dudleya pulverulenta ssp. pulverulenta California chalk lettuce Perennial herb 15
Dudleya saxosa Panamint dudleya Perennial herb 1
Dudleya saxosa ssp. aloides Desert dudleya Perennial herb 1
Dudleya saxosa ssp. saxosa Panamint dudleya Perennial herb  
Dudleya verityi Verity's dudleya Perennial herb  
Dudleya virens Bright green dudleya Perennial herb 4
Dudleya virens ssp. insularis Bright green dudleya Perennial herb  
Dudleya virens ssp. virens Bright green dudleya Perennial herb 1
Dudleya viscida Sticky dudleya Perennial herb 1
Echinodorus berteroi Burhead Perennial herb (aquatic)  
Ehrendorferia chrysantha Golden eardrops Perennial herb 5
Ehrendorferia ochroleuca Yellow bleeding heart Perennial herb  
Eleocharis acicularis Needle spikerush Perennial grass 2
Eleocharis acicularis var. acicularis Needle spike rush Perennial grass  
Eleocharis acicularis var. bella Beautiful spikerush Perennial grass  
Eleocharis acicularis var. occidentalis Needle spike rush Perennial grass  
Eleocharis bella Beautiful spikerush Perennial grass  
Eleocharis macrostachya Spike rush Perennial grass 19
Eleocharis montevidensis Montevideo spike rush Perennial grass 2
Eleocharis palustris Common spikerush Perennial grass 8
Eleocharis parishii Parish's spike rush Perennial grass  
Eleocharis parvula Small spikerush Perennial grass 2
Eleocharis pauciflora Few flowered spike rush Perennial grass  
Eleocharis quinqueflora Fewflower spikerush Perennial grass  
Eleocharis radicans Creeping spikerush Perennial grass  
Eleocharis rostellata Walking sedge Perennial grass 1
Elymus Xgouldii Many flowered wild rye Perennial grass  
Elymus Xhansenii Perennial grass  
Elymus condensatus Giant wild rye Perennial grass 31
Elymus elymoides Squirrel tail grass Perennial grass 14
Elymus elymoides ssp. brevifolius Short leaved squirreltail Perennial grass  
Elymus elymoides ssp. californicus California squirreltail Perennial grass  
Elymus elymoides ssp. elymoides Squirreltail Perennial grass  
Elymus elymoides var. brevifolius Squirrel tail grass Perennial grass  
Elymus elymoides var. californicus Squirrel tail grass Perennial grass  
Elymus elymoides var. elymoides Squirrel tail grass Perennial grass  
Elymus glaucus Blue wildrye Perennial grass 32
Elymus glaucus ssp. glaucus Blue wild rye Perennial grass 1
Elymus glaucus ssp. jepsonii Western rye grass Perennial grass 1
Elymus glaucus ssp. virescens Virginia wildrye Perennial grass  
Elymus multisetus Big squirreltail grass Perennial grass 12
Elymus spicatus Blue bunch wheat grass Perennial grass 7
Elymus stebbinsii Stebbins' wildrye Perennial grass  
Elymus trachycaulus Slender wheatgrass Perennial grass 8
Elymus trachycaulus ssp. subsecundus Bearded wheatgrass Perennial grass 2
Elymus trachycaulus ssp. trachycaulus Slender wheatgrass Perennial grass 7
Elymus triticoides Beardless wild rye Perennial grass 29
Epilobium anagallidifolium Alpine willowherb Perennial herb  
Epilobium angustifolium ssp. angustifolium Fireweed Perennial herb 2
Epilobium angustifolium ssp. circumvagum Fireweed Perennial herb 1
Epilobium canum California fuchsia Perennial herb 49
Epilobium canum ssp. canum California fuchsia Perennial herb 11
Epilobium canum ssp. latifolium California fushia Perennial herb 5
Epilobium ciliatum Slender willow herb Perennial herb 2
Epilobium ciliatum ssp. ciliatum Willow herb Perennial herb 2
Epilobium ciliatum ssp. glandulosum Glandular willowherb Perennial herb 1
Epilobium glaberrimum Smooth willowherb Perennial herb  
Epilobium glaberrimum ssp. fastigiatum Smooth willowherb Perennial herb  
Epilobium glaberrimum ssp. glaberrimum Smooth willowherb Perennial herb  
Epilobium halleanum Hairy willowherb Perennial herb  
Epilobium hallianum Hall's willowherb Perennial herb  
Epilobium lactiflorum White flowered willowherb Perennial herb  
Epilobium oregonense Slimstem willowweed Perennial herb  
Epipactis gigantea Stream orchid Perennial herb 16
Eremogone ferrisiae Perennial herb  
Eremogone macradenia Mojave sandwort Perennial herb  
Eremogone macradenia var. macradenia Desert sandwort Perennial herb  
Eriastrum densifolium Giant eriastrum Perennial herb 4
Eriastrum densifolium ssp. austromontanum Southern mountain eriastrum Perennial herb 1
Eriastrum densifolium ssp. densifolium Giant eriastrum Perennial herb 2
Eriastrum densifolium ssp. elongatum Perennial wool star Perennial herb  
Eriastrum densifolium ssp. mohavense Perennial vool star Perennial herb 1
Eriastrum densifolium ssp. sanctorum Santa ana river woollystar Perennial herb  
Ericameria paniculata Mojave rabbitbrush Perennial herb 1
Erigeron breweri Brewer's fleabane Perennial herb  
Erigeron breweri var. bisanctus Pious daisy Perennial herb  
Erigeron breweri var. breweri Brewer's daisy Perennial herb  
Erigeron breweri var. covillei Coville erigeron Perennial herb  
Erigeron breweri var. jacinteus San jacinto mtns. daisy Perennial herb (rhizomatous)  
Erigeron breweri var. porphyreticus Fleabane Perennial herb  
Erigeron coulteri Coulter's daisy Perennial herb  
Erigeron foliosus Leafy daisy Perennial herb  
Erigeron foliosus var. foliosus Thread stemmed fleabane Perennial herb, Shrub  
Erigeron linearis Narrow leaved fleabane Perennial herb 3
Erigeron lobatus Lobed fleabane Perennial herb 4
Erigeron lonchophyllus Shortray fleabane Perennial herb  
Erigeron parishii Parish fleabane Perennial herb  
Erigeron philadelphicus Philadelphia fleabane Perennial herb  
Eriodictyon parryi Poodle-dog bush Perennial herb 1
Eriodictyon sessilifolium sessile-leaved yerba stanta Perennial Herb  
Eriogonum elongatum Longstem buckwheat Perennial herb 3
Eriogonum elongatum var. elongatum Long stemmed buckwheat Perennial herb 3
Eriogonum inflatum Desert trumpet Perennial herb  
Eriogonum inflatum var. deflatum Deflated desert trumpet Perennial herb  
Eriogonum inflatum var. inflatum Desert trumpet Perennial herb  
Eriogonum latifolium Coast buckwheat Perennial herb 21
Eriogonum lobbii Lobb's buckwheat Perennial herb  
Eriogonum microtheca Slender buckwheat Perennial herb  
Eriogonum microtheca var. simpsonii Simpson's wild buckwheat Perennial herb  
Eriogonum oblongifolium Coast buckwheat Perennial herb 21
Eriogonum saxatile Rock buckwheat Perennial herb  
Eriogonum umbellatum Sulphur buckwheat Perennial herb 26
Eriogonum umbellatum var. canifolium Sulphur buckwheat Perennial herb  
Eriogonum umbellatum var. munzii Munz's buckwheat Perennial herb  
Eriogonum wrightii Wright's buckwheat Perennial herb, Shrub 6
Eriogonum wrightii var. membranaceum Wright s buckwheat Perennial herb, Shrub  
Eriogonum wrightii var. nodosum Wright s buckwheat Perennial herb, Shrub  
Eriogonum wrightii var. subscaposum Wright's buckwheat Perennial herb, Shrub 3
Eriogonum wrightii var. trachygonum Wright s buckwheat Perennial herb, Shrub  
Eriogonum wrightii var. wrightii Wright's buckwheat Perennial herb, Shrub 1
Erioneuron pulchellum Fluff grass Perennial grass  
Eriophyllum lanatum Wooly sunflower Perennial herb 27
Eriophyllum lanatum var. integrifolium Oregon sunshine Perennial herb  
Eryngium aristulatum Jepson's button celery Perennial herb 2
Erysimum capitatum Wallflower Perennial herb 10
Erysimum capitatum var. angustatum Contra costa wallflower Perennial herb 1
Erysimum capitatum var. bealianum Western wallflower Perennial herb 1
Erysimum capitatum var. capitatum Sanddune wallflower Perennial herb 1
Erysimum capitatum var. lompocense San luis obispo wallflower Perennial herb 1
Erysimum menziesii Menzies' wallflower Perennial herb 7
Erythranthe cardinalis Cardinal monkey flower Perennial herb 41
Erythranthe moschata Musk monkeyflower Perennial herb 1
Erythranthe nasuta Perennial herb  
Erythranthe primuloides Primrose monkeyflower Perennial herb  
Erythranthe tilingii Larger mountain monkeyflower Perennial herb 3
Eschscholzia californica ssp. californica California poppy Perennial herb 3
Eschscholzia procera Kernville poppy Perennial herb 3
Euphorbia albomarginata Rattlesnake sandmat Perennial herb  
Euphorbia arizonica Arizona spurge Perennial herb  
Euphorbia incisa Mojave spurge Perennial herb  
Euphorbia lurida Woodland spurge Perennial herb  
Euphorbia melanadenia Red-gland spurge Perennial herb  
Euphorbia palmeri Woodland spurge Perennial herb  
Euphorbia parishii Parish's sandmat Perennial herb  
Euphorbia pediculifera Carrizo mountain sandmat Perennial herb  
Euphorbia polycarpa Smallseed sandmat Perennial herb  
Euphorbia schizoloba Mojave spurge Perennial herb  
Euphorbia vallis-mortae Death valley sandmat Perennial herb  
Euthamia occidentalis Western goldenrod Perennial herb 15
Fagonia longipes Long leaf fagonia Perennial herb  
Fagonia pachyacantha Fagonis Perennial herb (stem succulent)  
Festuca californica California fescue Perennial grass 47
Festuca occidentalis Western fescue Perennial grass 8
Festuca rubra Red fescue Perennial grass 39
Fragaria crinita Beach strawberry Perennial herb 34
Fragaria vesca Wild strawberry Perennial herb 35
Frankenia palmeri Palmer's frankenia Perennial herb  
Frankenia salina Yerba reuma, alkali heath Perennial herb 11
Frasera albomarginata Desert frasera Perennial herb  
Frasera albomarginata var. albomarginata Desert green-gentian Perennial herb  
Frasera albomarginata var. induta Clark mountain green-gentian Perennial herb  
Frasera neglecta Pine green-gentian Perennial herb  
Frasera parryi Coahuila frasera Perennial herb  
Fritillaria biflora Chocolate lily Perennial herb 4
Fritillaria biflora var. biflora Chocolate lily Perennial herb (bulb) 4
Fritillaria roderickii Roderick's fritillary Perennial herb (bulb) 1
Funastrum crispum Wavyleaf twinevine Perennial herb  
Funastrum cynanchoides Fringed twinevine Perennial herb 2
Funastrum cynanchoides var. hartwegii Climbing milkweed Perennial herb 1
Funastrum hirtellum Hairy milkweed Perennial herb, Vine  
Funastrum utahense Utah vine milkweed Perennial herb  
Galium andrewsii Phlox leaved bedstraw Perennial herb  
Galium andrewsii ssp. andrewsii Phlox leaved bedstraw Perennial herb  
Galium angustifolium Narrow leaved bedstraw Perennial herb 3
Galium angustifolium ssp. angustifolium Narrow leaved bedstraw Perennial herb  
Galium angustifolium ssp. borregoense Borrego bedstraw Perennial herb  
Galium angustifolium ssp. foliosum Narrow leaved bedstraw Perennial herb  
Galium angustifolium ssp. gabrielense San antonio canyon bedstraw Perennial herb  
Galium angustifolium ssp. gracillimum Narrow leaved bedstraw Perennial herb  
Galium angustifolium ssp. jacinticum San jacinto mtns. bedstraw Perennial herb  
Galium californicum California bedstraw Perennial herb  
Galium californicum ssp. primum California bedstraw Perennial herb  
Galium hilendiae Hilend's bedstraw Perennial herb  
Galium hilendiae ssp. hilendiae Hilend's bedstraw Perennial herb  
Galium jepsonii Jepson's bedstraw Perennial herb (rhizomatous)  
Galium johnstonii Johnston's bedstraw Perennial herb  
Galium multiflorum Many flowered bedstraw Perennial herb  
Galium munzii Munz's bedstraw Perennial herb  
Galium nuttallii Climbing bedstraw Perennial herb  
Galium nuttallii ssp. nuttallii Climbing bedstraw Perennial herb  
Galium parishii Parish's bedstraw Perennial herb  
Galium trifidum Three petaled bedstraw Perennial herb  
Galium trifidum ssp. subbiflorum Threepetal bedstraw Perennial herb  
Galium trifidum var. pusillum Small bedstraw Perennial herb  
Gamochaeta ustulata Featherweed Perennial herb 1
Geranium californicum California geranium Perennial herb 1
Geranium concinnum California mountain geranium Perennial herb 1
Geranium richardsonii Richardson's geranium Perennial herb  
Glyceria elata Tall mannagrass Perennial grass 8
Glyceria occidentalis Waxy mannagrass Perennial grass (aquatic) 2
Glyceria striata Fowl mannagrass Perennial grass 8
Glycyrrhiza lepidota Lichorice Perennial herb 2
Gnaphalium canescens Everlasting cudweed Perennial herb 3
Gnaphalium canescens ssp. beneolens Cudweed Perennial herb 1
Gnaphalium canescens ssp. microcephalum White everlasting Perennial herb 1
Gnaphalium canescens ssp. thermale Small headed cudweed Perennial herb  
Gnaphalium leucocephalum White headed cudweed Perennial herb  
Grindelia camporum Gumweed Perennial herb 13
Grindelia hirsutula var. davyi Davy's gumweed Perennial herb 12
Gutierrezia californica Matchweed, snakeweed Perennial herb, Shrub 5
Helenium bigelovii Bigelow's sneezeweed Perennial herb 8
Helenium puberulum Sneezeweed Perennial herb 10
Helianthella californica California helianthella Perennial herb 5
Helianthus californicus California sunflower Perennial herb 4
Helianthus gracilentus Slender sunflower Perennial herb 5
Helianthus niveus ssp. tephrodes Algodones dunes sunflower Perennial herb  
Helianthus nuttallii Nuttall's sunflower Perennial herb  
Helianthus nuttallii ssp. nuttallii Nuttall's sunflower Perennial herb  
Heliotropium curassavicum Chinese parsley Perennial herb 8
Heliotropium curassavicum var. oculatum Seaside heliotrope Perennial herb 2
Heracleum lanatum Cow parsnip Perennial herb 20
Heracleum maximum Common cow parsnip Perennial herb 20
Hesperocallis undulata Desert lily Perennial herb 1
Hesperostipa comata Needle & thread grass Perennial grass 10
Hesperostipa comata ssp. comata Needle & thread grass Perennial grass 1
Hesperostipa comata ssp. intermedia Intermediate needle & thread grass Perennial grass  
Heterotheca sessiliflora ssp. echioides Bristly goldenaster Perennial herb  
Heterotheca sessiliflora ssp. fastigiata Erect goldenaster Perennial herb  
Heterotheca subaxillaris Camphorweed Perennial herb 1
Heterotheca villosa Hairy goldenaster Perennial herb 10
Heterotheca villosa var. scabra Rough hairy goldenaster Perennial herb  
Heterotheca villosa var. villosa Hairy goldenaster Perennial herb  
Heuchera alpestris Parish's alumroot Perennial herb 3
Heuchera caespitosa Urn-flowered alumroot Perennial herb 5
Heuchera cespitosa Tufted alumroot Perennial herb 3
Heuchera elegans Urn flowered alumroot Perennial herb (rhizomatous) 6
Heuchera hirsutissima Shaggy haired alumroot Perennial herb (rhizomatous) 6
Heuchera parishii Parish's alumroot Perennial herb (rhizomatous) 4
Heuchera rubescens Pink alumroot Perennial herb 6
Hibiscus denudatus Rocl hibiscus Perennial herb 1
Hieracium albiflorum White flowered hawkweed Perennial herb 1
Hieracium horridum Shaggy hawkweed Perennial herb  
Hilaria rigida Big galleta Perennial grass 7
Hippuris vulgaris Mare's tail Perennial herb (aquatic) 1
Hoffmannseggia glauca Hoffmanseggia Perennial herb  
Hoita macrostachya California hemp Perennial herb 6
Hoita orbicularis Creeping leather root Perennial herb 3
Hooveria parviflora Perennial herb  
Hordeum brachyantherum Meadow barley Perennial grass 24
Hordeum brachyantherum ssp. californicum Meadow barley Perennial grass 7
Hordeum jubatum Fox tail barley Perennial grass 7
Horkelia bolanderi Bolander's horkelia Perennial herb  
Horkelia clevelandii Cleveland's horkelia Perennial herb 2
Horkelia clevelandii var. clevelandii Cleveland's horkelia Perennial herb 1
Horkelia cuneata Wedge leaved horkelia Perennial herb 5
Horkelia cuneata ssp. cuneata Coast horkelia Perennial herb 1
Horkelia cuneata ssp. puberula Coast horkelia Perennial herb  
Horkelia cuneata var. cuneata Wedge leaved horkelia Perennial herb 1
Horkelia cuneata var. puberula Mesa horkelia Perennial herb  
Horkelia rydbergii Rydberg's horkelia Perennial herb  
Horkelia truncata Ramona horkelia Perennial herb  
Horsfordia newberryi Newberry's velvet mallow Perennial herb  
Hosackia crassifolia Broad leaved lotus Perennial herb 6
Hosackia crassifolia var. crassifolia Broad leaved lotus Perennial herb 2
Hosackia oblongifolia Narrow leaved lotus Perennial herb 2
Hosackia oblongifolia var. oblongifolia Narrow leaved lotus Perennial herb 1
Hulsea brevifolia Short leaved hulsea Perennial herb  
Hulsea californica San diego sunflower Perennial herb  
Hulsea heterochroma Red rayed hulsea Perennial herb 1
Hulsea vestita Pumice hulsea Perennial herb  
Hulsea vestita ssp. callicarpha Beautiful hulsea Perennial herb  
Hulsea vestita ssp. parryi Parry's hulsea Perennial herb  
Hydrocotyle ranunculoides Marsh pennywort Perennial herb 2
Hydrocotyle umbellata Marsh pennywort Perennial herb  
Hydrocotyle verticillata Whorled marsh pennywort Perennial herb 2
Hymenopappus filifolius Columbia cutleaf Perennial herb  
Hymenopappus filifolius var. lugens Columbia cutleaf Perennial herb  
Hymenothrix dissecta Ragged leaf bahia Perennial herb  
Hymenoxys cooperi Cooper's goldflower Perennial herb  
Hypericum formosum St john's wort Perennial herb  
Hypericum formosum var. scouleri Scouler's st. john's wort Perennial herb 2
Hypericum scouleri Scouler's st john's wort Perennial herb 2
Imperata brevifolia Satintail Perennial grass 2
Ipomopsis tenuifolia Slender leaved ipomopsis Perennial herb 2
Iris hartwegii Hartweg's iris Perennial herb 4
Iris hartwegii ssp. australis Southern hartweg's iris Perennial herb  
Iris purdyi Purdy's iris Perennial herb 2
Iva axillaris Povertyweed Perennial herb  
Iva axillaris ssp. robustior Poverty weed Perennial herb  
Iva hayesiana San diego marsh elder Perennial herb 13
Ivesia callida Tahquitz ivesia Perennial herb  
Ivesia santolinoides Mouse tail ivesia Perennial herb  
Ivesia saxosa Rock ivesia Perennial herb  
Jepsonia parryi Parry's jepsonia Perennial herb  
Juncus acutus Spiny rush Perennial grass (rhizomatous) 13
Juncus acutus ssp. leopoldii Wire grass Perennial grass (rhizomatous) 2
Juncus balticus Wire rush Perennial grass 19
Juncus balticus ssp. ater Baltic rush Perennial grass 2
Juncus bufonius var. occidentalis Round fruited toad rush Perennial grass  
Juncus cooperi Cooper's rush Perennial grass  
Juncus dubius Mariposa rush Perennial grass 1
Juncus duranii Duran's rush Perennial grass (rhizomatous)  
Juncus effusus Common bog rush Perennial grass 44
Juncus effusus ssp. austrocalifornicus Common bog rush Perennial grass 1
Juncus effusus ssp. pacificus Pacific rush Perennial grass 6
Juncus effusus var. exiguus Common bog rush Perennial grass  
Juncus effusus var. pacificus Pacific bog rush Perennial grass 6
Juncus exiguus Klamath or weak rush Perennial grass  
Juncus longistylis Long styled rush Perennial grass 1
Juncus macrandrus Long anthered rush Perennial grass  
Juncus macrophyllus Rush Perennial grass 1
Juncus mertensianus Merten's rush Perennial grass 1
Juncus mexicanus Mexican rush Perennial grass 10
Juncus oxymeris Pointed rush Perennial grass 1
Juncus patens Rush Perennial grass 47
Juncus phaeocephalus Brown headed rush Perennial grass 10
Juncus phaeocephalus var. paniculatus Rush Perennial grass  
Juncus phaeocephalus var. phaeocephalus Brown headed rush Perennial grass  
Juncus rugulosus Wrinkled rush Perennial grass  
Juncus saximontanus Rocky mountain rush Perennial grass  
Juncus tenuis Slender rush Perennial grass 9
Juncus textilis Basket rush Perennial grass 7
Juncus torreyi Torrey's rush Perennial grass 5
Juncus xiphioides Iris leaved rush Perennial grass 16
Kelloggia galioides Kelloggia Perennial herb  
Koeleria macrantha June grass Perennial grass 29
Kopsiopsis strobilacea California ground-cone Perennial herb (parasitic)  
Lathyrus palustris Marsh pea Perennial herb  
Lathyrus polyphyllus Oregon pea Perennial herb  
Lathyrus splendens Pride of california Perennial herb  
Lathyrus sulphureus Sulpher pea Perennial herb  
Lathyrus vestitus Common pacific pea Perennial herb 7
Lathyrus vestitus var. alefeldii San diego pea Perennial herb 2
Lathyrus vestitus var. vestitus Hillside pea Perennial herb 2
Leersia oryzoides Rice cutgrass Perennial grass 2
Lemna gibba Gibbous duckweed Perennial herb  
Lemna minor Smaller duckweed Perennial herb 3
Lemna minuscula Least duckweed Perennial herb  
Lemna minuta Least duckweed Perennial herb  
Lemna trisulca Star duckweed Perennial herb  
Lemna valdiviana Duckweed Perennial herb  
Lepidium fremontii Desert pepper grass Perennial herb 4
Lepidium fremontii var. fremontii Desert pepper grass Perennial herb 4
Leptodactylon jaegeri Jaeger's prickly phlox Perennial herb  
Leptosiphon floribundus Many flowered linanthus Perennial herb  
Leptosiphon floribundus ssp. floribundus Many flowered linanthus Perennial herb  
Leptosiphon floribundus ssp. glaber Smooth many flowered linanthus Perennial herb  
Leptosiphon floribundus ssp. hallii Santa rosa mountains leptosiphon Perennial herb  
Leptosiphon nuttallii Nuttall's linanthus Perennial herb 2
Leptosiphon nuttallii ssp. nuttallii Nuttall's linanthus Perennial herb 2
Lessingia filaginifolia Common california aster Perennial herb 17
Lessingia filaginifolia var. californica Beach aster Perennial herb 9
Lessingia filaginifolia var. filaginifolia Common california aster Perennial herb 8
Lewisia rediviva Bitter root Perennial herb 4
Lewisia rediviva var. minor Bitter root Perennial herb  
Leymus Xmultiflorus Many flowered wild rye Perennial grass  
Leymus condensatus Giant rye grass Perennial grass 34
Leymus triticoides Alkali rye Perennial grass 30
Lilium humboldtii Humboldt's lily Perennial herb 8
Lilium humboldtii ssp. humboldtii Humboldt's lily Perennial herb (bulb) 1
Lilium humboldtii ssp. ocellatum Humboldt lily Perennial herb (bulb)  
Lilium parryi Lemon lily Perennial herb (bulb) 6
Linanthus floribundus Many flowered linanthus Perennial herb  
Linanthus floribundus ssp. floribundus Many flowered linanthus Perennial herb  
Linanthus floribundus ssp. glaber Smooth many flowered linanthus Perennial herb  
Linanthus floribundus ssp. hallii Santa rosa mtns. linanthus Perennial herb  
Linanthus jaegeri San jacinto linanthus Perennial herb  
Linanthus nuttallii Nuttall's linanthus Perennial herb 2
Linum lewisii Lewis' flax Perennial herb 38
Linum lewisii var. alpicola Alpine lewis' flax Perennial herb 1
Linum lewisii var. lewisii Lewis' flax Perennial herb 5
Listera convallarioides Broad lipped twayblade Perennial herb  
Lithophragma affine Common woodland star Perennial herb 1
Lithophragma bolanderi Hillstar Perennial herb  
Lithophragma heterophyllum Woodland star Perennial herb 1
Lithophragma parviflorum Pink woodland star Perennial herb 1
Lithophragma tenellum Woodland star Perennial herb  
Lobelia cardinalis Cardinalflower Perennial herb 16
Lobelia cardinalis var. pseudosplendens Cardinal flower Perennial herb 16
Lobelia dunnii Dunn's lobelia Perennial herb 11
Lobelia dunnii var. serrata Dunn's lobelia Perennial herb 6
Lomatium dasycarpum Lace parsnip Perennial herb 4
Lomatium dasycarpum ssp. dasycarpum Woolly fruited lomatium Perennial herb  
Lomatium dissectum Fern leaved lomatium Perennial herb 3
Lomatium dissectum var. multifidum Fern leaved lomatium Perennial herb 1
Lomatium lucidum Shiny lomatium Perennial herb  
Lomatium mohavense Mohave wild parsely Perennial herb  
Lomatium multifidum Fern leaved lomatium Perennial herb 1
Lomatium utriculatum Hog fennel Perennial herb 2
Lomatium vaginatum Sheathed lomatium Perennial herb  
Lotus argophyllus Silver birds foot trefoil Perennial herb 1
Lotus argophyllus var. argophyllus Southern california silver lotus Perennial herb  
Lotus argyraeus Canyon birdsfoot trefoil Perennial herb  
Lotus argyraeus var. argyraeus Canyon lotus Perennial herb  
Lotus crassifolius Broad leaved lotus Perennial herb 7
Lotus crassifolius var. crassifolius Broad leaved lotus Perennial herb 2
Lotus grandiflorus Large leaved lotus Perennial herb 3
Lotus grandiflorus var. grandiflorus Chaparral lotus Perennial herb 1
Lotus haydonii Pygmy lotus Perennial herb  
Lotus heermannii Heermann's lotus Perennial herb 3
Lotus heermannii var. heermannii Heermann's lotus Perennial herb 1
Lotus heermannii var. orbicularis Round leaved heermann's lotus Perennial herb  
Lotus nevadensis Sierra lotus Perennial herb  
Lotus nevadensis var. davidsonii Davidson's sierra nevada lotus Perennial herb  
Lotus nevadensis var. nevadensis Sierra nevada lotus Perennial herb  
Lotus oblongifolius Narrow leaved lotus Perennial herb  
Lotus oblongifolius var. oblongifolius Narrow leaved lotus Perennial herb 1
Lotus procumbens Silky california broom Perennial herb, Shrub  
Lotus procumbens var. procumbens Silky california broom Perennial herb, Shrub  
Lotus rigidus Desert lotus Perennial herb  
Lotus scoparius Deerweed Perennial herb 21
Lotus scoparius var. brevialatus Short winged deerweed Perennial herb  
Lotus scoparius var. scoparius Deerweed Perennial herb  
Ludwigia peploides ssp. peploides Floating water primrose Perennial herb  
Ludwigia repens Creeping water primrose Perennial herb  
Lupinus adsurgens Drew's silky lupine Perennial herb  
Lupinus andersonii Anderson's lupine Perennial herb  
Lupinus argenteus var. heteranthus Silvery lupine Perennial herb 3
Lupinus breweri Brewer's lupine Perennial herb 2
Lupinus formosus Western lupine Perennial herb 6
Lupinus formosus var. formosus Western lupine Perennial herb  
Lupinus formosus var. robustus Giant western lupine Perennial herb  
Lupinus hyacinthinus Hyacinth lupine Perennial herb  
Lupinus latifolius Broad leaf lupine Perennial herb 9
Lupinus latifolius var. parishii Parish's lupine Perennial herb 2
Lupinus polyphyllus Bog lupine Perennial herb 27
Lupinus polyphyllus var. burkei Large leaved lupine Perennial herb 6
Lupinus rivularis Riverbank lupine Perennial herb 8
Luzula comosa Hairy wood rush Perennial grass 4
Luzula comosa var. laxa Hairy wood rush Perennial grass 3
Lycopus americanus Bugleweed Perennial herb 2
Lythrum californicum Common loosestrife Perennial herb  
Machaeranthera asteroides Hoary aster Perennial herb  
Machaeranthera asteroides var. asteroides Hoary aster Perennial herb  
Machaeranthera canescens Hoary aster Perennial herb 1
Machaeranthera canescens var. canescens Hoary aster Perennial herb  
Machaeranthera canescens var. ziegleri Ziegler's aster Perennial herb  
Machaeranthera pinnatifida var. gooddingii Goodding's aster Perennial herb  
Maianthemum racemosum Feathery false lily of the valley Perennial herb 19
Maianthemum racemosum ssp. amplexicaule Feathery false lily of the valley Perennial herb 3
Maianthemum stellatum Starry false lily of the valley Perennial herb 17
Malacothrix saxatilis Cliff aster Perennial herb 6
Malacothrix saxatilis var. tenuifolia Short leaved cliff aster Perennial herb 1
Malaxis monophyllos Perennial herb (bulb)  
Malaxis monophyllos ssp. brachypoda Adder's mouth Perennial herb (bulb)  
Malaxis monophyllos var. brachypoda White bog adder's-mouth Perennial herb (bulb)  
Malvella leprosa Alkali mallow Perennial herb 3
Marah fabacea California man-root Perennial herb, Vine 5
Marah fabaceus Manroot Perennial herb, Vine 6
Marah fabaceus var. agrestis Wild cucumber Perennial herb, Vine 4
Marah macrocarpa Chilicothe Perennial herb, Vine 5
Marah macrocarpus Southern wild cucumber Perennial herb, Vine 5
Marah macrocarpus var. macrocarpus Southern wild cucumber Perennial herb, Vine 1
Marah macrocarpus var. major Southern wild cucumber Perennial herb, Vine 1
Marina orcuttii Sonoran false prairie clover Perennial herb  
Marina orcuttii var. orcuttii California marina Perennial herb 1
Marina parryi Parry dalea Perennial herb 1
Matelea parvifolia Spearleaf Perennial herb  
Melica aristata Awned melic Perennial grass 1
Melica bulbosa Oniongrass Perennial grass 1
Melica californica California melic Perennial grass 25
Melica frutescens Tall melica Perennial grass 1
Melica imperfecta Coast range melic Perennial grass 21
Menodora scabra var. glabrescens Broom tvinberry Perennial herb 2
Menodora scoparia Broom tvinberry Perennial herb 2
Mentha arvensis American wild mint Perennial herb 6
Mentha canadensis Wild mint Perennial herb 6
Mentzelia laevicaulis Giant blazingstar Perennial herb 5
Mentzelia longiloba Many flowered mentzelia Perennial herb  
Mentzelia multiflora Adonis blazingstar Perennial herb  
Mentzelia multiflora ssp. longiloba Many flowered mentzelia Perennial herb  
Mentzelia multiflora var. longiloba Adonis blazingstar Perennial herb  
Mentzelia puberula Argus blazing star Perennial herb  
Mentzelia ravenii Grass blazingstar Perennial herb  
Micranthes californica Greene's saxifrage Perennial herb  
Mimulus cardinalis Cardinal monkey flower Perennial herb 41
Mimulus clevelandii Cleveland's bush monkeyflower Perennial herb 2
Mimulus moschatus Musk monkeyflower Perennial herb 1
Mimulus moschatus var. longiflorus Muskflower Perennial herb  
Mimulus primuloides Primrose monkeyflower Perennial herb 3
Mimulus primuloides ssp. primuloides Primrose monkeyflower Perennial herb  
Mimulus primuloides var. pilosellus Primrose monkeyflower Perennial herb  
Mimulus primuloides var. primuloides Primrose monkeyflower Perennial herb  
Mimulus tilingii Larger mountain monkeyflower Perennial herb 3
Minuartia decumbens The lassics sandwort Perennial herb  
Mirabilis albida Dwarf four o'clock Perennial herb 1
Mirabilis alipes Winged four o'clock Perennial herb  
Mirabilis bigelovii Bigelow's desert four o'clock Perennial herb 3
Mirabilis bigelovii var. bigelovii Pale stemmed four o clock Perennial herb 1
Mirabilis bigelovii var. retrorsa Wishbone Perennial herb  
Mirabilis californica Wishbone bush Perennial herb 12
Mirabilis comata Hairy tuft four o'clock Perennial herb  
Mirabilis laevis Desert wishbone bush Perennial herb 3
Mirabilis laevis var. crassifolia California four o'clock Perennial herb 12
Mirabilis laevis var. laevis Desert wishbone bush Perennial herb  
Mirabilis laevis var. retrorsa Wishbone bush Perennial herb  
Mirabilis laevis var. villosa Wishbone bush Perennial herb 3
Mirabilis multiflora Giant four o'clock Perennial herb 8
Mirabilis multiflora var. pubescens Desert four o'clock Perennial herb  
Mirabilis oblongifolia Oblong leafed four o'clock Perennial herb 1
Mirabilis pumila Little umbrella wort Perennial herb  
Mirabilis tenuiloba Slender lobed four o'clock Perennial herb  
Monardella australis Southern mountain monardella Perennial herb  
Monardella australis ssp. australis Southern mountain monardella Perennial herb  
Monardella hypoleuca White leaf monardella Perennial herb  
Monardella hypoleuca ssp. hypoleuca White leaf monardella Perennial herb  
Monardella hypoleuca ssp. intermedia White leaf monardella Perennial herb  
Monardella hypoleuca ssp. lanata Felt leaved monardella Perennial herb (rhizomatous)  
Monardella linoides Narrow leaved monardella Perennial herb 7
Monardella linoides ssp. anemonoides Narrow leaved monardella Perennial herb 1
Monardella linoides ssp. linoides Flax like monardella Perennial herb 1
Monardella linoides ssp. viminea Willowy monardella Perennial herb 8
Monardella macrantha Hummingbird monardella Perennial herb 12
Monardella macrantha ssp. hallii Hall's monardella Perennial herb (rhizomatous)  
Monardella nana Little monardella Perennial herb 2
Monardella nana ssp. arida Desert monardella Perennial herb 1
Monardella nana ssp. leptosiphon San felipe monardella Perennial herb (rhizomatous) 1
Monardella nana ssp. nana Little monardella Perennial herb  
Monardella nana ssp. tenuiflora Short flowered monardella Perennial herb  
Monardella odoratissima Mountain monardella Perennial herb 21
Monardella robisonii Rock pennyroyal Perennial herb (rhizomatous)  
Monardella villosa Coyote mint Perennial herb 28
Monardella viminea Willowy monardella Perennial herb 8
Montia chamissoi Spring beauty Perennial herb  
Montia parvifolia Showy rock montia Perennial herb 4
Muhlenbergia andina Foxtail muhly Perennial grass  
Muhlenbergia asperifolia Scratchgrass Perennial grass 1
Muhlenbergia californica California muhly Perennial grass (rhizomatous)  
Muhlenbergia dumosa Bamboo muhly Perennial grass 6
Muhlenbergia emersleyi Gooding's muhly Perennial grass  
Muhlenbergia porteri Porter's muhly Perennial grass 2
Muhlenbergia richardsonis Richardson's muhly Perennial grass  
Muhlenbergia rigens Deergrass Perennial grass 62
Muilla clevelandii San diego goldenstar Perennial herb (bulb)  
Muilla coronata Crowned muilla Perennial herb (bulb)  
Muilla maritima Common muilla Perennial herb 1
Myriophyllum sibiricum Siberian water milfoil Perennial herb (aquatic)  
Myriopteris wootonii Wooton's lace fern Perennial herb  
Nassella cernua Nodding needlegrass Perennial grass 24
Nassella lepida Small flowered stipa Perennial grass 25
Nassella pulchra Purple needlegrass Perennial grass 42
Nasturtium officinale Watercress Perennial herb (aquatic) 3
Nicolletia occidentalis Western nicolletia Perennial herb  
Nicotiana obtusifolia Desert tobacco Perennial herb 1
Nitrophila occidentalis Western nitrophila Perennial herb  
Nolina bigelovii Bigelow's nolina Perennial herb 3
Nolina parryi Parry's nolina Perennial herb 7
Oenanthe sarmentosa Water parsley Perennial herb 9
Oenothera caespitosa Fragrant evening primrose Perennial herb 8
Oenothera caespitosa ssp. marginata Large white desert primrose Perennial herb  
Oenothera californica California evening primrose Perennial herb 6
Oenothera californica ssp. avita California evening primrose Perennial herb  
Oenothera californica ssp. californica California evening primrose Perennial herb  
Oenothera cespitosa Fragrant evening-primrose Perennial herb 8
Oenothera cespitosa ssp. marginata Fragrant evening-primrose Perennial herb  
Oenothera elata Evening primrose Perennial herb 16
Oenothera elata ssp. hirsutissima Evening primrose Perennial herb 3
Oenothera elata ssp. hookeri Evening primrose Perennial herb 18
Oenothera suffrutescens Wild honeysuckle, linda tarde Perennial herb  
Oenothera villosa ssp. strigosa Hairy evening primrose Perennial herb 20
Opuntia californica var. californica Snake cholla Perennial herb (stem succulent) 5
Opuntia munzii Munz's cholla Perennial herb (stem succulent) 2
Oreostemma alpigenum Tundra aster Perennial herb 3
Oreostemma alpigenum var. andersonii Tundra aster Perennial herb 1
Orobanche bulbosa Chaparral broomrape Perennial herb (parasitic)  
Orobanche californica California orobanche Perennial herb (parasitic)  
Orobanche californica ssp. feudgei California broomrape Perennial herb (parasitic)  
Orobanche cooperi Burroweed strangler Perennial herb (parasitic)  
Orobanche fasciculata Clustered broomrape Perennial herb (parasitic)  
Orobanche parishii Parish's broom rape Perennial herb (parasitic)  
Orobanche parishii ssp. parishii Parish broomrape Perennial herb (parasitic)  
Orobanche uniflora Naked broom rape Perennial herb (parasitic)  
Orthilia secunda One sided wintergreen Perennial herb  
Osmorhiza berteroi Sweet cicely Perennial herb 3
Osmorhiza brachypoda California sweet cicely Perennial herb  
Osmorhiza chilensis Western sweet cicely Perennial herb 3
Oxalis albicans Hairywood sorrell Perennial herb  
Oxalis albicans ssp. californica Californica wood sorrel Perennial herb  
Oxalis albicans ssp. pilosa Hairy wood sorrel Perennial herb  
Oxalis californica Californica wood sorrel Perennial herb  
Oxalis corniculata ssp. pilosa Hairy wood sorrel Perennial herb  
Oxypolis occidentalis Western cow bane Perennial herb  
Oxyria digyna Alpine mountain sorrel Perennial herb  
Packera ganderi Gander's ragwort Perennial herb  
Paeonia brownii Peony Perennial herb 1
Paeonia californica California peony Perennial herb 1
Panicum acuminatum Western witch grass Perennial grass  
Panicum acuminatum var. fasciculatum Pacific panic grass Perennial grass  
Panicum urvilleanum Desert panicgrass Perennial grass  
Paspalum distichum Knot grass Perennial grass 2
Pedicularis densiflora Indian warrior Perennial herb 1
Pedicularis semibarbata Pine woods lousewort Perennial herb  
Pediomelum californicum Indian breadroot Perennial herb  
Penstemon Xparishii Hybrid beardtongue Perennial herb  
Penstemon californicus California beardtongue Perennial herb 1
Penstemon centranthifolius Scarlet bugler Perennial herb 17
Penstemon clevelandii Cleveland's beardtongue Perennial herb 5
Penstemon clevelandii var. clevelandii Cleveland's beardtongue Perennial herb 1
Penstemon clevelandii var. connatus San jacinto beardtongue Perennial herb 1
Penstemon clevelandii var. mohavensis Mohave beard's tongue Perennial herb  
Penstemon eatonii Eaton firecracker Perennial herb 28
Penstemon eatonii var. eatonii Eaton's penstemon Perennial herb  
Penstemon eatonii var. undosus Eaton's firecracker Perennial herb  
Penstemon fruticiformis Death valley penstemon Perennial herb  
Penstemon grinnellii Grinnell's beardtongue Perennial herb 9
Penstemon grinnellii var. grinnellii Grinnell's beardtongue Perennial herb  
Penstemon heterophyllus Foothill penstemon Perennial herb 40
Penstemon heterophyllus var. australis Southern foothill penstemon Perennial herb  
Penstemon heterophyllus var. heterophyllus Foothill penstemon Perennial herb 1
Penstemon labrosus San gabriel beardtongue Perennial herb 2
Penstemon newberryi Mountain pride Perennial herb 15
Penstemon palmeri Palmer's penstemon Perennial herb 21
Penstemon palmeri var. palmeri Palmer's penstemon Perennial herb  
Penstemon pseudospectabilis Desert penstemon Perennial herb 9
Penstemon pseudospectabilis ssp. pseudospectabilis Desert beardtongue Perennial herb  
Penstemon rostriflorus Bridge's penstemon Perennial herb 8
Penstemon speciosus Showy penstemon Perennial herb 13
Penstemon spectabilis Showy penstemon Perennial herb 24
Penstemon spectabilis var. spectabilis Showy penstemon Perennial herb  
Penstemon spectabilis var. subviscosis Showy penstemon Perennial herb  
Penstemon spectabilis var. subviscosus Showy penstemon Perennial herb  
Penstemon thurberi Thurber's beardtongue Perennial herb 1
Pentachaeta aurea ssp. aurea Golden chaetopappa Perennial herb  
Perideridia gairdneri Gairdner's yampah Perennial herb 2
Perideridia parishii Parish's yampah Perennial herb  
Perideridia parishii ssp. latifolia Parish's yampah Perennial herb  
Persicaria amphibia Water smartweed Perennial herb (aquatic) 2
Persicaria hydropiperoides Water pepper Perennial herb  
Persicaria punctata Dotted smartweed Perennial herb 4
Petalonyx thurberi Sandpaper plant Perennial herb 2
Petalonyx thurberi ssp. thurberi Thurber's sandpaper plant Perennial herb  
Phacelia californica Rock phacelia Perennial herb 16
Phacelia cinerea Ashy phacelia Perennial herb 3
Phacelia hastata White leafed phacelia Perennial herb  
Phacelia hastata ssp. hastata Mountain phacelia Perennial herb  
Phacelia hastata var. hastata Mountain phacelia Perennial herb  
Phacelia imbricata Imbricate phacelia Perennial herb 3
Phacelia imbricata ssp. imbricata Imbricate phacelia Perennial herb  
Phacelia imbricata ssp. patula Imbricate phacelia Perennial herb  
Phacelia imbricata var. patula Imbricate phacelia Perennial herb  
Phacelia mutabilis Changeable phacelia Perennial herb  
Phacelia oreopola ssp. oreopola San gabriel mtns. imbricate phacelia Perennial herb  
Phacelia ramosissima Branching phacelia Perennial herb 3
Phacelia ramosissima var. latifolia Branching phacelia Perennial herb 3
Phacelia ramosissima var. montereyensis Monterey branching phacelia Perennial herb 3
Phacelia ramosissima var. ramosissima Branching phacelia Perennial herb  
Phleum alpinum Timothy grass Perennial grass 2
Phlox austromontana Southern mountain phlox Perennial herb  
Pholisma arenarium Dune food Perennial herb (parasitic)  
Phoradendron densum Dense mistletoe Perennial herb  
Phoradendron pauciflorum Fir mistletoe Perennial herb  
Phragmites australis Common reed Perennial grass 1
Phragmites australis ssp. americanus Perennial grass  
Phyla lanceolata Lance leaf lippia Perennial herb  
Phyla nodiflora Common lippia Perennial herb 13
Phyla nodiflora var. incisa Common lippia Perennial herb 12
Phyla nodiflora var. nodiflora Common lippia Perennial herb 12
Physalis hederifolia Ivy leafed tomatillo Perennial herb  
Physalis hederifolia var. fendleri Fendler's ivy leaf tomatillo Perennial herb  
Physalis lobata Lobed ground cherry Perennial herb  
Piperia cooperi Coopers rein orchid Perennial herb  
Piperia elegans ssp. elegans Elegant piperia Perennial herb  
Piperia elongata Dense flowered rein orchid Perennial herb  
Piperia transversa Mountain piperia Perennial herb  
Piperia unalascensis Alaska piperia Perennial herb  
Plantago subnuda Coastal plantain Perennial herb 7
Platanthera dilatata Scentbottle Perennial herb  
Platanthera dilatata var. leucostachys Sierra bog orchid Perennial herb  
Platanthera leucostachys White flowered bog orchid Perennial herb  
Platanthera sparsiflora Bog orchid Perennial herb  
Pleuraphis rigida Galletta grass Perennial grass 7
Poa ampla Western blue grass Perennial grass 15
Poa fendleriana Muttongrass Perennial grass 4
Poa fendleriana ssp. longiligula Fendler's blue grass Perennial grass  
Poa juncifolia Western blue grass Perennial grass 14
Poa nevadensis Sierra blue grass Perennial grass 14
Poa pratensis ssp. agassizensis Agassiz kentucky blue grass Perennial grass  
Poa secunda Pine bluegrass Perennial grass 17
Poa secunda ssp. juncifolia Rush blue grass Perennial grass 14
Poa secunda ssp. secunda Sandberg's bluegrass Perennial grass 18
Poa wheeleri Hooker's bluegrass Perennial grass 1
Polygala cornuta Sierra milkwort Perennial herb  
Polygonum amphibium Water smartweed Perennial herb 2
Polygonum amphibium var. emersum Water smartweed Perennial herb (aquatic) 1
Polygonum amphibium var. stipulaceum Water smartweed Perennial herb 1
Polygonum bistortoides Western knotweed Perennial herb  
Polygonum hydropiperoides Water pepper Perennial herb  
Polygonum punctatum Punctate smartweed Perennial herb 4
Porophyllum gracile Odora Perennial herb  
Potamogeton diversifolius Rafinesque's pondweed Perennial herb (aquatic)  
Potamogeton foliosus Leafy pondweed Perennial herb (aquatic)  
Potamogeton foliosus ssp. foliosus Leafy pondweed Perennial herb (aquatic)  
Potamogeton foliosus var. foliosus Pondweed Perennial herb (aquatic)  
Potamogeton latifolius Nevada pondweed Perennial herb (aquatic)  
Potamogeton nodosus Pondweed Perennial herb (aquatic)  
Potamogeton pectinatus Fennel pondweed Perennial herb (aquatic)  
Potamogeton pusillus Small pondweed Perennial herb (aquatic)  
Potamogeton pusillus var. pusillus Small pondweed Perennial herb (aquatic)  
Potentilla biennis Biennial cinquefoil Perennial herb 1
Potentilla glandulosa Gland cinquefoil Perennial herb 12
Potentilla glandulosa ssp. ewanii Ewan's cinquefoil Perennial herb  
Potentilla glandulosa ssp. glandulosa Sticky cinquefoil Perennial herb  
Potentilla glandulosa ssp. hansenii Hansen's cinquefoil Perennial herb  
Potentilla glandulosa ssp. nevadensis Nevada cinquefoil Perennial herb  
Potentilla glandulosa ssp. reflexa Sticky cinquefoil Perennial herb  
Potentilla gracilis Northwest cinquefoil Perennial herb 15
Potentilla gracilis var. elmeri Elmer's cinquefoil Perennial herb 1
Potentilla gracilis var. fastigiata Slender cinquefoil Perennial herb  
Potentilla rimicola Cliff cinquefoil Perennial herb  
Potentilla wheeleri Wheeler's cinquefoil Perennial herb  
Primula clevelandii Padre's shooting star Perennial herb 7
Primula clevelandii var. clevelandii Cleveland's shooting star Perennial herb  
Primula fragrans Scented shooting star Perennial herb  
Primula jeffreyi Sierra shooting star Perennial herb 3
Primula tetrandra Alpine shooting star Perennial herb 2
Proboscidea althaeifolia Desert devil's claw Perennial herb  
Prunella vulgaris Self heal Perennial herb 19
Prunella vulgaris var. lanceolata Mountain selfheal Perennial herb 8
Pseudognaphalium beneolens Cudweed Perennial herb 1
Pseudognaphalium biolettii Two-color rabbit-tobacco Perennial herb 4
Pseudognaphalium canescens Wright's cudweed Perennial herb 2
Pseudognaphalium canescens ssp. beneolens Wright's cudweed Perennial herb 1
Pseudognaphalium canescens ssp. canescens Wright's cudweed Perennial herb  
Pseudognaphalium canescens ssp. microcephalum Wright's cudweed Perennial herb  
Pseudognaphalium canescens ssp. thermale Wright's cudweed Perennial herb  
Pseudognaphalium leucocephalum White cudweed Perennial herb  
Pseudognaphalium microcephalum Wright's cudweed Perennial herb 3
Pseudognaphalium stramineum Cottonbatting plant Perennial herb 4
Pseudognaphalium thermale Small headed cudweed Perennial herb  
Pseudoroegneria spicata Bluebunch wheatgrass Perennial grass 4
Pseudoroegneria spicata ssp. spicata Bent grass Perennial grass 3
Pterospora andromedea Pine drops Perennial herb (parasitic)  
Puccinellia nuttalliana Nuttall's alkali grass Perennial grass 1
Pycnanthemum californicum California mint Perennial herb 4
Pyrola aphylla Leafless wintergreen Perennial herb  
Pyrola dentata Toothed wintergreen Perennial herb  
Pyrola minor Lesser wintergreen Perennial herb  
Pyrola picta White veined shinleaf Perennial herb  
Ranunculus alismifolius Common water plantain buttercup Perennial herb  
Ranunculus alismifolius var. alismellus Slender buttercup Perennial herb  
Ranunculus aquatilis white water butter cup Perennial herb (aquatic)  
Ranunculus aquatilis var. aquatilis White water butter cup Perennial herb (aquatic)  
Ranunculus aquatilis var. capillaceus Threadleaf crowfoot Perennial herb (aquatic)  
Ranunculus aquatilis var. diffusus white water butter cup Perennial herb (aquatic)  
Ranunculus aquatilis var. hispidulus White water crowfoot Perennial herb (aquatic)  
Ranunculus aquatilis var. subrigidus Longbeak buttercup Perennial herb (aquatic)  
Ranunculus californicus Common buttercup Perennial herb 11
Ranunculus californicus var. californicus Common buttercup Perennial herb 2
Ranunculus cymbalaria Alkali buttercup Perennial herb  
Ranunculus cymbalaria var. saximontanus Rocky mountain buttercup Perennial herb  
Ranunculus eschscholtzii Eschscholtz's buttercup Perennial herb  
Ranunculus eschscholtzii var. oxynotus Eschscholtz's buttercup Perennial herb  
Ranunculus longirostris Longbeak buttercup Perennial herb (aquatic)  
Ranunculus occidentalis Western buttercup Perennial herb 6
Romneya coulteri Coulter's matilija poppy Perennial herb (rhizomatous) 44
Romneya trichocalyx Hairy matilija poppy Perennial herb 1
Rorippa nasturtium-aquaticum Water cress Perennial herb (aquatic) 3
Rumex californicus California dock Perennial herb  
Rumex hymenosepalus Wild rhubarb Perennial herb  
Rumex salicifolius Willow leaved dock Perennial herb 6
Rumex salicifolius var. denticulatus Smooth valved willow dock Perennial herb  
Rumex salicifolius var. salicifolius Willow dock Perennial herb 6
Rumex salicifolius var. triangulivalvis Willow dock Perennial herb  
Rumex triangulivalvis Willow dock Perennial herb  
Rumex utahensis Toothed willow dock Perennial herb  
Rupertia physodes Common rupertia Perennial herb 1
Rupertia rigida Parish's rupertia Perennial herb  
Ruppia cirrhosa Ditch grass Perennial herb (aquatic)  
Ruppia maritima Ditch grass Perennial herb (aquatic)  
Sabulina decumbens The Lassics sandwort Perennial herb  
Sagina saginoides Alpine pearlwort Perennial herb  
Sagittaria latifolia Broad leaf arrowhead Perennial herb (aquatic) 11
Sagittaria longiloba Long lobed arrowhead Perennial herb (aquatic)  
Salicornia pacifica Pickleweed Perennial herb 8
Salicornia subterminalis Parish's glasswort Perennial herb 4
Salvia Xpalmeri Perennial herb  
Samolus parviflorus Water pimpernel Perennial herb  
Sanicula arguta Sharp toothed snakeroot Perennial herb 2
Sanicula bipinnata Poison sanicle Perennial herb  
Sanicula bipinnatifida Purple sanicle Perennial herb  
Sanicula crassicaulis Pacific sanicle Perennial herb 3
Sanicula graveolens Sierra sanicle Perennial herb  
Sanicula tuberosa Turkey pea Perennial herb  
Sarcodes sanguinea Snow plant Perennial herb (mycoparasitic)  
Sarcostemma cynanchoides ssp. hartwegii Climbing milkweed Perennial herb, Vine 1
Sarcostemma hirtellum Rambling milkweed Perennial herb, Vine  
Satureja chandleri San miguel savory Perennial herb 6
Saxifraga californica Greene's saxifrage Perennial herb  
Saxifraga fallax California saxifrage Perennial herb  
Schoenoplectiella saximontana Rocky Mountain Bulrush Perennial grass  
Schoenoplectus acutus Hardstem bulrush Perennial grass 25
Schoenoplectus acutus var. occidentalis Tule Perennial grass 1
Schoenoplectus americanus Chairmaker's bulrush Perennial grass 17
Schoenoplectus californicus California bulrush Perennial grass 14
Schoenoplectus heterochaetus Slender bulrush Perennial grass (rhizomatous) 1
Schoenoplectus pungens Common threesquare Perennial grass 2
Schoenoplectus pungens var. badius Common threesquare Perennial grass  
Schoenoplectus pungens var. longispicatus Common threesquare Perennial grass 2
Schoenoplectus tabernaemontani Softstem bulrush Perennial grass 12
Scirpus acutus var. occidentalis Hard stemmed tule Perennial grass 1
Scirpus americanus American tule Perennial grass 17
Scirpus californicus California tule Perennial grass 14
Scirpus heterochaetus Slender bulrush Perennial grass (rhizomatous)  
Scirpus maritimus Prairie bulrush Perennial grass 15
Scirpus microcarpus Small fruited bulrush Perennial grass 20
Scirpus pungens Three square Perennial grass 2
Scirpus robustus Big bulrush Perennial grass 10
Scirpus tabernaemontani Mountain bulrush Perennial grass 4
Scrophularia californica California bee plant Perennial herb 30
Scrophularia californica ssp. floribunda Common california figwort Perennial herb 29
Scutellaria antirrhinoides Snapdragon skullcap Perennial herb 2
Scutellaria bolanderi Bolander's skullcap Perennial herb  
Scutellaria bolanderi ssp. austromontana Southern skullcap Perennial herb (rhizomatous)  
Scutellaria siphocampyloides Gray leaved skullcap Perennial herb 5
Scutellaria tuberosa Danny's scullcap Perennial herb 1
Sedum niveum Davidson's stonecrop Perennial herb (rhizomatous) 1
Sedum pinetorum Pine city sedum Perennial herb 1
Sedum spathulifolium Pacific stonecrop Perennial herb 28
Senecio astephanus San gabriel ragwort Perennial herb  
Senecio ganderi Gander's ragwort Perennial herb  
Senecio hydrophilus Alkali marsh ragwort Perennial herb  
Senecio triangularis Groundsel Perennial herb  
Senna covesii Coves's cassia Perennial herb 5
Sesuvium verrucosum Western sea purslane Perennial herb  
Setaria gracilis Perennial foxtail Perennial grass  
Setaria parviflora Marsh bristlegrass Perennial grass  
Sidalcea malviflora Wild hollyhock Perennial herb 21
Sidalcea malviflora ssp. laciniata Laciniate checker mallow Perennial herb (rhizomatous)  
Sidalcea malviflora ssp. malviflora Checker mallow Perennial herb (rhizomatous) 1
Sidalcea malviflora ssp. sparsifolia Few leafed checkerbloom Perennial herb (rhizomatous)  
Sidalcea neomexicana Mountain sidalcea Perennial herb 2
Sidalcea oregana Oregon checker mallow Perennial herb 4
Sidalcea oregana ssp. spicata Oregon checker mallow Perennial herb 1
Sidalcea reptans Sierra checker mallow Perennial herb  
Sidalcea sparsifolia Southern checkerbloom Perennial herb (rhizomatous)  
Silene laciniata Cardinal catchfly Perennial herb 6
Silene laciniata ssp. laciniata Cardinal catchfly Perennial herb 2
Silene laciniata ssp. major Indian pink Perennial herb 2
Silene lemmonii Lemmon's catchfly Perennial herb  
Silene parishii Parish's campion Perennial herb  
Sisyrinchium bellum Blue eyed grass Perennial herb 62
Smilacina racemosa Western false solomon's seal Perennial herb 19
Smilacina stellata Star flowered false solomon's seal Perennial herb 17
Solanum clokeyi Island nightshade Perennial herb 1
Solanum douglasii Douglas' nightshade Perennial herb 4
Solanum wallacei Northern island nightshade Perennial herb 1
Solanum xanti Nightshade Perennial herb, Shrub 13
Solidago californica Oreja de liebre Perennial herb 27
Solidago confinis Southern goldenrod Perennial herb 4
Solidago sparsiflora Great basin goldenrod Perennial herb 4
Solidago velutina Threenerve goldenrod Perennial herb 8
Solidago velutina ssp. californica Oreja de liebre Perennial herb 27
Solidago velutina ssp. sparsiflora Great basin goldenrod Perennial herb 2
Sparganium erectum Simplestem bur reed Perennial herb  
Sparganium erectum ssp. stoloniferum Bur reed Perennial herb 2
Sparganium eurycarpum Broadfruit bur reed Perennial herb 5
Sparganium eurycarpum ssp. eurycarpum Bur reed Perennial herb 3
Sparganium eurycarpum var. eurycarpum Broadfruit bur reed Perennial herb  
Sparganium eurycarpum var. greenei Bur reed Perennial herb 2
Spergularia macrotheca Sticky sand spurry Perennial herb 1
Spergularia macrotheca var. leucantha White sticky sand spurry Perennial herb  
Sphaeralcea ambigua Desert mallow Perennial herb 29
Sphaeralcea ambigua var. ambigua Apricot mallow Perennial herb 2
Sphaeralcea ambigua var. rosacea Rosy apricot mallow Perennial herb  
Sphaeralcea ambigua var. rugosa Desert globemallow Perennial herb  
Sphaeralcea emoryi Emory's globemallow Perennial herb 1
Sphaeralcea emoryi var. emoryi Emory's desert mallow Perennial herb 1
Sphaeralcea rusbyi Rusby's globemallow Perennial herb  
Sphaeralcea rusbyi var. eremicola Rusby's desert mallow Perennial herb  
Sphaeromeria potentilloides Cinquefoil tansy Perennial herb  
Sphaeromeria potentilloides var. potentilloides Cinquefoil tansy Perennial herb  
Sphenopholis obtusata Prairie wedge grass Perennial grass  
Sphenosciadium capitellatum Grayswamp whiteheads Perennial herb 2
Spiranthes porrifolia Western ladies tresses Perennial herb  
Spiranthes romanzoffiana Ladies' tresses Perennial herb  
Sporobolus airoides Alkali sacaton Perennial grass 20
Sporobolus contractus Spike dropseed Perennial grass 1
Sporobolus cryptandrus Sand dropseed Perennial grass 11
Sporobolus flexuosus Mesa dropseed Perennial grass  
Stachys ajugoides Hedge nettle Perennial herb 7
Stachys ajugoides var. rigida Hedge nettle Perennial herb  
Stachys albens Cobwebby hedge nettle Perennial herb 9
Stachys bergii Berg's hedgenettle Perennial herb 1
Stachys bullata Southern hedge nettle Perennial herb 16
Stachys mexicana Mexican hedgenettle Perennial herb 1
Stachys pycnantha Short spike hedge nettle Perennial herb 3
Stachys rigida Rough hedgenettle Perennial herb 3
Stachys rigida var. quercetorum Rough hedgenettle Perennial herb 1
Stachys rigida var. rigida Rough hedgenettle Perennial herb 1
Stachys stebbinsii Stebbins' hedgenettle Perennial herb  
Stachys stricta Sonoma hedge nettle Perennial herb  
Stanleya pinnata Prince's plume Perennial herb, Shrub 7
Stanleya pinnata var. inyoensis Inyo prince's plume Perennial herb, Shrub 2
Stanleya pinnata var. pinnata Prince's plume Perennial herb, Shrub 2
Stellaria borealis Boreal starwort Perennial herb  
Stellaria calycantha Northern bogwort Perennial herb  
Stellaria longipes Longstalk starwort Perennial herb  
Stemodia durantifolia White woolly stemodia Perennial herb  
Stephanomeria cichoriacea Fort tejon milk aster Perennial herb  
Stephanomeria parryi Parry rock pink Perennial herb  
Stephanomeria pauciflora Wire lettuce Perennial herb 1
Stephanomeria pauciflora var. pauciflora Wire lettuce Perennial herb 1
Stillingia linearifolia Narrow leaved stillingia Perennial herb  
Stillingia paucidentata Tooth leaf Perennial herb 1
Stipa cernua Nodding needle grass Perennial grass 23
Stipa comata Needle-and-thread Perennial grass 10
Stipa comata var. comata Needle & thread grass Perennial grass 1
Stipa comata var. intermedia Intermediate needle & thread grass Perennial grass  
Stipa coronata Crested needle grass Perennial grass 7
Stipa hymenoides Indian rice grass Perennial grass 15
Stipa latiglumis Wide-glumed needle grass Perennial grass  
Stipa lemmonii Lemmon's needle grass Perennial grass 2
Stipa lemmonii var. lemmonii Lemmon's needle grass Perennial grass  
Stipa lepida Foothill needle grass Perennial grass 24
Stipa lettermanii Letterman's needle grass Perennial grass 1
Stipa occidentalis Western needlegrass Perennial grass 1
Stipa occidentalis var. californica California needle grass Perennial grass  
Stipa occidentalis var. occidentalis Western needle grass Perennial grass  
Stipa occidentalis var. pubescens Common western needle grass Perennial grass  
Stipa parishii Parish's needlegrass Perennial grass  
Stipa parishii var. parishii Parish's needlegrass Perennial grass  
Stipa pulchra Purple needle grass Perennial grass 42
Stipa speciosa Desert needle grass Perennial grass 8
Streptanthus bernardinus Laguna mtns. jewel flower Perennial herb  
Streptanthus campestris Southern jewel flower Perennial herb  
Stuckenia pectinata Sago pondweed Perennial herb (aquatic)  
Stuckenia striata Broadleaf pondweed Perennial herb (aquatic)  
Suaeda moquinii Bush seepweed Perennial herb 3
Suaeda nigra Bush seepweed Perennial herb 3
Swertia albomarginata White margined green gentian Perennial herb  
Swertia neglecta Pine green gentian Perennial herb  
Swertia parryi Parry's green gentian Perennial herb  
Symphyotrichum ascendens Western aster Perennial herb 1
Symphyotrichum chilense Pacific aster Perennial herb 36
Symphyotrichum chilense var. chilense Pacific aster Perennial herb 14
Symphyotrichum defoliatum San bernardino aster Perennial herb (rhizomatous)  
Symphyotrichum foliaceum Alpine leafybract aster Perennial herb 2
Symphyotrichum lanceolatum White panicle aster Perennial herb  
Symphyotrichum lanceolatum var. hesperium Western lance leaf aster Perennial herb  
Symphyotrichum spathulatum Western mountain aster Perennial herb 1
Symphyotrichum spathulatum var. spathulatum Western mountain aster Perennial herb  
Symphyotrichum subulatum var. parviflorum Eastern annual saltmarsh aster Perennial herb  
Tauschia arguta Southern tauschia Perennial herb  
Tauschia hartwegii Hartweg's umbrellawort Perennial herb 1
Tauschia parishii Parish's tauschia Perennial herb  
Thalictrum fendleri Fendler's meadow rue Perennial herb 11
Thalictrum fendleri var. fendleri Fendler's meadow rue Perennial herb  
Thalictrum fendleri var. polycarpum Torrey's meadow rue Perennial herb 13
Thalictrum polycarpum Fendler's meadow-rue Perennial herb 13
Thalictrum sparsiflorum Few flowered meadow rue Perennial herb  
Thelypodium stenopetalum Slender petaled thelypodium Perennial herb  
Thermopsis californica California goldenbanner Perennial herb 1
Thermopsis californica var. semota Velvety false lupine Perennial herb (rhizomatous)  
Thermopsis macrophylla var. semota Velvety false lupine Perennial herb (rhizomatous)  
Thymophylla pentachaeta Fiveneedle pricklyleaf Perennial herb 3
Thymophylla pentachaeta var. belenidium Five needled thymophylla Perennial herb 1
Tidestromia oblongifolia Honey sweet Perennial herb  
Tiquilia canescens Woody crinklemat Perennial herb, Shrub  
Tiquilia canescens var. canescens Gray coldenia Perennial herb, Shrub  
Tiquilia canescens var. pulchella Chocolate mtns. coldenia Perennial herb, Shrub  
Tiquilia palmeri Palmer's coldenia Perennial herb  
Tiquilia plicata Plicate coldenia Perennial herb  
Toxicoscordion brevibracteatum Desert death camas Perennial herb  
Toxicoscordion fremontii Fremont's star lily Perennial herb 5
Toxicoscordion venenosum Meadow deathcamas Perennial herb  
Toxicoscordion venenosum var. venenosum Meadow deathcamas Perennial herb  
Tragia ramosa Desert noseburn Perennial herb  
Tricardia watsonii Three hearts Perennial herb  
Tridens muticus Slim tridens Perennial grass  
Tridens muticus var. muticus Slim tridens Perennial grass  
Trifolium longipes Long stalked clover Perennial herb  
Trifolium longipes ssp. hansenii Hansen's clover Perennial herb  
Trifolium longipes var. longipes Long stalked clover Perennial herb  
Trifolium longipes var. nevadense Mountain clover Perennial herb  
Trifolium macrocephalum Big headed clover Perennial herb  
Trifolium monanthum Carpet clover Perennial herb  
Trifolium monanthum ssp. grantianum Grant's carpet clover Perennial herb  
Trifolium monanthum ssp. tenerum Delicate carpet clover Perennial herb  
Trifolium monanthum var. grantianum Grant's carpet clover Perennial herb  
Trifolium wormskioldii Cow clover Perennial herb 8
Trillium albidum Giant white wakerobin Perennial herb 3
Trimorpha lonchophylla Spearleaved northern daisy Perennial herb  
Trisetum canescens Nodding trisetum Perennial grass  
Trisetum cernuum var. projectum Nodding oatgrass Perennial grass  
Trisetum spicatum Narrow oatgrass Perennial grass  
Triteleia laxa Ithuriel's spear Perennial herb 12
Turricula parryi Poodle dog bush Perennial herb 1
Turritis glabra Tower rockcress Perennial herb  
Typha domingensis Cattail Perennial herb 5
Typha latifolia Broadleaf cattail Perennial herb (aquatic) 22
Urtica dioica Stinging nettle Perennial herb 11
Urtica dioica ssp. holosericea Stinging nettle Perennial herb 5
Utricularia macrorhiza Common bladderwort Perennial herb  
Venegasia carpesioides Canyon sunflower Perennial herb 10
Veratrum californicum California false hellebore Perennial herb 3
Veratrum californicum var. californicum California corn lily Perennial herb  
Verbena lasiostachys Western vervain Perennial herb 16
Verbena lasiostachys var. lasiostachys Vervain Perennial herb 17
Verbena lasiostachys var. scabrida Robust vervain Perennial herb 17
Verbena neomexicana Hillside vervain Perennial herb  
Veronica americana American brooklime Perennial herb 6
Veronica serpyllifolia Thymeleaf speedwell Perennial herb  
Veronica serpyllifolia ssp. humifusa Sprawling speedwell Perennial herb  
Veronica wormskjoldii American alpine speedwell Perennial herb  
Vicia americana American vetch Perennial herb, Vine 4
Vicia americana ssp. americana American vetch Perennial herb, Vine  
Vicia americana var. americana Vetch Perennial herb, Vine  
Viola adunca Western dog violet Perennial herb 18
Viola aurea Golden violet Perennial herb  
Viola douglasii Douglas' violet Perennial herb 2
Viola lobata Moose horn violet Perennial herb  
Viola macloskeyi Macloskey's violet Perennial herb 1
Viola nephrophylla Leconte violet Perennial herb  
Viola ocellata Western heart's ease Perennial herb 1
Viola pedunculata California golden violet Perennial herb 1
Viola pedunculata ssp. pedunculata Johnny jump up Perennial herb 1
Viola pinetorum Pine violet Perennial herb 2
Viola pinetorum ssp. grisea Grey leaved violet Perennial herb  
Viola pinetorum ssp. pinetorum Pine violet Perennial herb  
Viola purpurea Goosefoot violet Perennial herb  
Viola purpurea ssp. aurea Golden violet Perennial herb  
Viola purpurea ssp. mesophyta Goosefoot violet Perennial herb  
Viola purpurea ssp. purpurea Goosefoot violet Perennial herb  
Viola purpurea ssp. quercetorum Goosefoot yellow violet Perennial herb  
Viola purpurea ssp. venosa Desert violet Perennial herb  
Viola sheltonii Shelton's violet Perennial herb  
Viola sororia Common blue violet Perennial herb 2
Viola sororia ssp. affinis Northern bog violet Perennial herb  
Wolffia columbiana Columbia water meal Perennial herb  
Wolffiella lingulata Mud midget Perennial herb  
Wyethia ovata Southern wyethia Perennial herb  
Xanthisma spinulosum Perennial herb  
Xanthisma spinulosum var. gooddingii Goodding's aster Perennial herb  
Xylorhiza cognata Mecca aster Perennial herb  
Xylorhiza orcuttii Orcutt's woody aster Perennial herb 1
Xylorhiza tortifolia Mojave woodyaster Perennial herb 4
Xylorhiza tortifolia var. tortifolia Desert aster Perennial herb  
Zannichellia palustris Horned pondweed Perennial herb  
Zigadenus brevibracteatus Desert death camas Perennial herb  
Zigadenus fremontii Fremont's death camas Perennial herb 5
Zigadenus venenosus Meadow deathcamas Perennial herb 2
Zigadenus venenosus var. venenosus Death camas Perennial herb  
  Lifeform: Fern79 plants
  Lifeform: Shrub650 plants
  Lifeform: Tree76 plants
  Lifeform: Vine1 plant
 
Pink background indicates a plant is non-native.
! indicates a plant is potentially invasive.
NB: found in Riverside County is intended to indicate only plants found growing in the wild. However, the evidence is not always clear, and may occasionally include plants found in cultivation. To verify the wild presence of any particular plant in the list above, please click through to Calflora and look closely at the observations in this county.