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Criteria:   found in Colusa County  •   is native  •  group by lifeform
1997  records include photos for these plants # number of sources
Scientific Name Common Name Lifeform #
  Lifeform: Annual760 plants
Achyrachaena mollis Blow wives Annual herb 2
Acmispon americanus American bird's foot trefoil Annual herb 3
Acmispon americanus var. americanus Spanish lotus Annual herb 1
Acmispon brachycarpus Short podded lotus Annual herb  
Acmispon denticulatus Toothed lotus Annual herb  
Acmispon micranthus Small flowered lotus Annual herb 2
Acmispon parviflorus Hill lotus Annual herb  
Acmispon rubriflorus Red-flowered bird's-foot trefoil Annual herb  
Acmispon wrangelianus Chilean trefoil Annual herb  
Agoseris heterophylla Mountain dandelion Annual herb  
Agoseris heterophylla var. crenulata Annual agoseris Annual herb  
Agoseris heterophylla var. cryptopleura Mountain dandelion Annual herb  
Agoseris heterophylla var. heterophylla Annual agoseris Annual herb  
Agoseris heterophylla var. turgida Annual agoseris Annual herb  
Allophyllum divaricatum Purple false gilia Annual herb  
Allophyllum gilioides Dense false gilia Annual herb  
Allophyllum gilioides ssp. gilioides Dense false gilia Annual herb  
Allophyllum gilioides ssp. violaceum Dense false gilia Annual herb  
Alopecurus saccatus Foxtail Annual grass  
Amaranthus blitoides Prostrate pigweed Annual herb  
Amaranthus californicus California amaranth Annual herb  
Amaranthus palmeri Palmer's amaranth Annual herb  
Ammannia coccinea Red ammannia Annual herb  
Ammannia robusta Grand ammania Annual herb  
Amsinckia intermedia Common fiddleneck Annual herb 1
Amsinckia lunaris Bent flowered fiddleneck Annual herb  
Amsinckia lycopsoides Tarweed fiddleneck Annual herb  
Amsinckia menziesii Fiddleneck Annual herb 1
Amsinckia menziesii var. intermedia Orange flowered menzies' fiddleneck Annual herb 1
Amsinckia menziesii var. menziesii Small flowered fiddleneck Annual herb 1
Amsinckia retrorsa Rigid fiddleneck Annual herb  
Amsinckia tessellata Devil's lettuce Annual herb 4
Amsinckia tessellata var. gloriosa Large flowered devil's fiddleneck Annual herb 1
Ancistrocarphus filagineus Woolly fishhooks Annual herb  
Androsace elongata California rockjasmine Annual herb  
Androsace elongata ssp. acuta California androsace Annual herb  
Antirrhinum cornutum Spurred snapdragon Annual herb  
Antirrhinum subcordatum Dimorphic snapdragon Annual herb  
Antirrhinum vexillo-calyculatum Brewer's snapdragon Annual herb  
Antirrhinum vexillo-calyculatum ssp. breweri Brewer's sail flower snapdragon Annual herb  
Antirrhinum vexillo-calyculatum ssp. intermedium Intermediate sail flower snapdragon Annual herb  
Antirrhinum vexillo-calyculatum ssp. vexillo-calyculatum Wiry snapdragon Annual herb  
Antirrhinum vexillocalyculatum Wiry snapdragon Annual herb  
Antirrhinum vexillocalyculatum ssp. breweri Wiry snapdragon Annual herb  
Antirrhinum vexillocalyculatum ssp. intermedium Wiry snapdragon Annual herb  
Aphanes occidentalis Ladie's mantle Annual, Perennial herb  
Aphyllon vallicolum Valley broom rape Annual herb  
Apiastrum angustifolium Wild celery Annual herb  
Argemone munita Prickly poppy Annual, Perennial herb 4
Astragalus breweri Brewer's milk vetch Annual herb  
Astragalus gambelianus Loco weed Annual herb  
Astragalus rattanii Rattan's milk vetch Annual herb  
Astragalus rattanii var. jepsonianus Jepson's milk vetch Annual herb  
Astragalus tener Alkali milk vetch Annual herb  
Astragalus tener var. ferrisiae Ferris's milk vetch Annual herb  
Athysanus pusillus Dwarf athysanus Annual herb  
Athysanus unilateralis Ladiestongue mustard Annual herb  
Atriplex argentea Silverscale saltbush Annual herb 2
Atriplex argentea var. expansa Mojave silverscale Annual herb 2
Atriplex argentea var. mohavensis Mojave silverscale Annual herb 2
Atriplex coronata Crownscale Annual herb  
Atriplex coronata var. coronata Crownscale Annual herb  
Atriplex depressa Brittlescale Annual herb  
Atriplex joaquinana San joaquin spearscale Annual herb  
Atriplex joaquiniana San joaquin orache Annual herb  
Atriplex patula Spear oracle Annual herb 3
Atriplex persistens Pool orache Annual herb  
Atriplex serenana Saltscale Annual herb 1
Atriplex serenana var. serenana Saltscale Annual herb  
Bergia texana Texas bergia Annual herb  
Bidens frondosa Sticktight Annual herb  
Blennosperma nanum Yellow carpet Annual herb  
Blennosperma nanum var. nanum Common blennosperma Annual herb  
Bromus orcuttianus Orcutt's brome grass Annual grass 1
Bromus vulgaris Common brome Annual grass 1
Calandrinia breweri Brewer's calandrinia Annual herb 1
Calandrinia ciliata Redmaids Annual herb 7
Calandrinia menziesii Calandrinia Annual herb 7
California macrophylla Round leaved filaree Annual herb  
Callitriche marginata Winged water starwort Annual herb (aquatic)  
Calycadenia fremontii Fremont's calycadenia Annual herb  
Calycadenia micrantha Small flowered calycadenia Annual herb  
Calycadenia multiglandulosa Rosin weed Annual herb  
Calycadenia pauciflora Small flowered calycadenia Annual herb  
Calycadenia truncata Rosin weed Annual herb  
Calycadenia truncata ssp. microcephala Oregon western rosinweed Annual herb  
Calyptridium monandrum Common pussypaws Annual herb  
Calyptridium quadripetalum Four petaled pussypaws Annual herb  
Calyptridium umbellatum Pussy toes Annual, Perennial herb 3
Camissonia contorta Contorted sun cup Annual herb  
Camissonia graciliflora Hill sun cup Annual herb  
Camissonia hirtella Hairy sun cups Annual herb  
Camissonia ignota Jurupa hills sun cups Annual herb 1
Camissonia intermedia Intermediate sun cups Annual herb  
Camissonia micrantha Spencer primrose Annual herb 2
Camissoniopsis hirtella Hairy sun cup Annual herb  
Camissoniopsis ignota Jurupa hills sun cup Annual herb 1
Camissoniopsis intermedia Intermediate sun cups Annual herb  
Camissoniopsis micrantha Spencer primrose Annual herb 2
Campanula angustiflora Eastwood's harebell Annual herb  
Campanula griffinii Griffin's harebell Annual herb  
Cardamine oligosperma Idaho bittercress Annual, Perennial herb  
Castilleja attenuata Narrow leaved owl's clover Annual herb  
Castilleja densiflora Dense flower owl's clover Annual herb  
Castilleja exserta Owl's clover Annual herb 10
Castilleja exserta ssp. exserta Purple owl's clover Annual herb 5
Castilleja minor Little paintbrush Annual herb 1
Castilleja minor ssp. spiralis Lesser paintbrush Annual herb  
Castilleja rubicundula Cream sacs Annual herb  
Castilleja rubicundula ssp. lithospermoides Cream sacs Annual herb  
Castilleja rubicundula ssp. rubicundula Cream sacs Annual herb  
Castilleja rubicundula var. rubicundula Pink creamsacs Annual herb  
Castilleja tenuis Hairy owl's clover Annual herb  
Caulanthus flavescens Yellow california mustard Annual herb 1
Caulanthus lasiophyllus California mustard Annual herb  
Centaurium muehlenbergii Monterey centaury Annual herb 2
Centaurium trichanthum Alkali centaury Annual herb  
Centaurium venustum Beautiful centaury Annual herb  
Centromadia fitchii Spikeweed Annual herb  
Centromadia parryi Pappose tarweed Annual herb  
Centromadia parryi ssp. parryi Pappose tarplant Annual herb  
Centromadia parryi ssp. rudis Pappose tarweed Annual herb  
Centromadia pungens Common tarweed Annual herb 1
Centromadia pungens ssp. maritima Common tarweed Annual herb  
Centromadia pungens ssp. pungens Common tarweed Annual herb  
Centromadia pungens ssp. septentrionalis Common tarweed Annual herb  
Chaenactis douglasii Chaenactis Annual, Perennial herb  
Chaenactis douglasii var. douglasii Dusty pincushions Annual, Perennial herb  
Chaenactis glabriuscula Common yellow chaenactis Annual herb 3
Chaenactis glabriuscula var. glabriuscula Common yellow chaenactis Annual herb  
Chaenactis glabriuscula var. heterocarpha Variable fruited yellow chaenactis Annual herb  
Chaenactis glabriuscula var. megacephala Big headed yellow chaenactis Annual herb 1
Chamaesyce ocellata Contura creek spurge Annual herb  
Chamaesyce ocellata ssp. ocellata Contura creek sandmat Annual herb  
Chamaesyce ocellata ssp. rattanii Stony creek spurge Annual herb  
Chamaesyce serpyllifolia Thyme leafed spurge Annual herb  
Chamaesyce serpyllifolia ssp. hirtula Hairy thyme leafed spurge Annual herb  
Chamaesyce serpyllifolia ssp. serpyllifolia Thyme leafed spurge Annual herb  
Chamomilla suaveolens Common pineapple weed Annual herb  
Chenopodium atrovirens Dark green goosefoot Annual herb  
Chenopodium berlandieri Pit seed goosefoot Annual herb  
Chenopodium berlandieri var. sinuatum Pitseed goosefoot Annual herb  
Chenopodium hians Gaping goosefoot Annual herb  
Chenopodium incognitum Masked goosefoot Annual herb  
Chloropyron palmatum Palmate-bracted bird's-beak Annual herb  
Chorizanthe membranacea Pink spineflower Annual herb 1
Clarkia affinis Chaparral fairyfan Annual herb  
Clarkia concinna Red ribbons Annual herb 5
Clarkia concinna ssp. concinna Red ribbons Annual herb  
Clarkia gracilis Graceful clarkia Annual herb 3
Clarkia gracilis ssp. albicaulis White stemmed clarkia Annual herb 1
Clarkia gracilis ssp. gracilis Graceful clarkia Annual herb  
Clarkia gracilis ssp. sonomensis Sonoma clarkia Annual herb  
Clarkia gracilis ssp. tracyi Tracy's clarkia Annual herb 1
Clarkia modesta Waltham creek clarkia Annual herb  
Clarkia purpurea Purple clarkia Annual herb 9
Clarkia purpurea ssp. purpurea Purple clarkia Annual herb 2
Clarkia purpurea ssp. quadrivulnera Purple clarkia Annual herb 4
Clarkia purpurea ssp. viminea Large godetia Annual herb  
Clarkia rhomboidea Tongue clarkia Annual herb 2
Clarkia unguiculata Woodland clarkia Annual herb 19
Claytonia exigua Little spring beauty Annual herb  
Claytonia exigua ssp. exigua Viridis Annual herb  
Claytonia exigua ssp. glauca Blue leaved spring beauty Annual herb  
Claytonia gypsophiloides Gypsum spring beauty Annual herb 1
Claytonia parviflora Narrow leaved miner's lettuce Annual herb 2
Claytonia parviflora ssp. parviflora Miner'slettuce Annual herb 1
Claytonia parviflora ssp. utahensis Streambank springbeauty Annual herb 1
Claytonia parviflora ssp. viridis Green miner's lettuce Annual herb 1
Claytonia perfoliata Miner's lettuce Annual herb 6
Claytonia perfoliata ssp. intermontana Miner's lettuce Annual herb  
Claytonia perfoliata ssp. perfoliata Claytonia Annual herb  
Claytonia rubra Red stemmed spring beauty Annual herb  
Claytonia saxosa Brandegee's spring beauty Annual herb  
Collinsia bartsiifolia White collinsia Annual herb 1
Collinsia bartsiifolia var. bartsiifolia White chinese houses Annual herb  
Collinsia grandiflora Large flowered collinsia Annual herb 2
Collinsia greenei Greene's collinsia Annual herb  
Collinsia heterophylla Chinese houses Annual herb 20
Collinsia heterophylla var. heterophylla Purple chinese houses Annual herb  
Collinsia rattanii Rattan's collinsia Annual herb 1
Collinsia sparsiflora Few flowered collinsia Annual herb  
Collinsia sparsiflora var. arvensis Field collinsia Annual herb  
Collinsia sparsiflora var. collina Hillside collinsia Annual herb  
Collinsia sparsiflora var. sparsiflora Few flowered collinsia Annual herb  
Collinsia torreyi Torrey's collinsia Annual herb  
Collinsia torreyi var. wrightii Wright's collinsia Annual herb  
Collomia diversifolia Serpentine collomia Annual herb  
Collomia grandiflora Large flowered collomia Annual herb 4
Collomia heterophylla Varied leaved collomia Annual herb  
Collomia tinctoria Yellow staining collomia Annual herb  
Conyza canadensis Canada horseweed Annual herb  
Conyza coulteri Coulter's horseweed Annual herb  
Cordylanthus palmatus Palmate bracted bird's beak Annual herb (hemiparasitic)  
Cordylanthus pilosus Hairy bird's beak Annual herb  
Cordylanthus pilosus ssp. pilosus Hairy bird's beak Annual herb  
Cordylanthus pringlei Pringle's bird's beak Annual herb  
Cordylanthus tenuis Slender bird's beak Annual herb  
Cordylanthus tenuis ssp. brunneus Serpentine bird's beak Annual herb (hemiparasitic)  
Cordylanthus tenuis ssp. viscidus Viscid bird's beak Annual herb  
Crassula connata Sand pygmy weed Annual herb 1
Croton setiger Turkey-mullein Annual herb 4
Croton setigerus Dove weed Annual herb 1
Cryptantha affinis Common cryptantha Annual herb  
Cryptantha clevelandii Common cryptantha Annual herb  
Cryptantha clevelandii var. dissita Serpentine cryptantha Annual herb  
Cryptantha dissita Serpentine cryptantha Annual herb  
Cryptantha excavata Deep scarred cryptantha Annual herb  
Cryptantha flaccida Beaked cryptantha Annual herb  
Cryptantha hispidula Napa cryptantha Annual herb  
Cryptantha intermedia Common cryptanth Annual herb  
Cryptantha intermedia var. hendersonii Henderson's cryptantha Annual herb  
Cryptantha intermedia var. intermedia Common cryptantha Annual herb  
Cryptantha microstachys Tejon cryptantha Annual herb  
Cryptantha milobakeri Milo baker's cryptantha Annual herb  
Cryptantha muricata Prickly cryptantha Annual herb 2
Cryptantha muricata var. jonesii Jones' cryptantha Annual herb 2
Cryptantha muricata var. muricata Showy prickly-nut cryptantha Annual herb 2
Cryptantha nemaclada Colusa cryptantha Annual herb  
Cryptantha rostellata Beaked cryptantha Annual herb  
Cryptantha simulans Pine cryptantha Annual herb  
Cryptantha torreyana Torrey's cryptantha Annual herb  
Cryptantha torreyana var. torreyana Torrey's cryptantha Annual herb  
Cuscuta brachycalyx San joaquin dodder Annual herb, Vine (parasitic)  
Cuscuta californica California dodder Annual herb, Vine (parasitic)  
Cuscuta californica var. californica Short flowered dodder Annual herb, Vine (parasitic)  
Cuscuta indecora Big seed alfalfa dodder Annual herb, Vine (parasitic)  
Cuscuta indecora var. indecora Big seed alfalfa dodder Annual herb, Vine (parasitic)  
Cuscuta indecora var. neuropetala Nerve petaled dodder Annual herb, Vine (parasitic)  
Cuscuta obtusiflora Peruvian dodder Annual herb, Vine (parasitic)  
Cuscuta obtusiflora var. glandulosa Peruvian dodder Annual herb, Vine (parasitic)  
Cyperus acuminatus Short pointed cyperus Annual grass  
Cyperus erythrorhizos Red rooted cyperus Annual grass 2
Cyperus odoratus Fragrant flatsedge Annual grass  
Cyperus squarrosus Awned cyperus Annual grass  
Daucus pusillus Wild carrot Annual herb 1
Deschampsia danthonioides Annual hairgrass Annual grass  
Diplacus bolanderi Bolander's monkeyflower Annual herb  
Diplacus douglasii Purple mouse ears Annual herb 1
Diplacus kelloggii Kellogg's monkeyflower Annual herb  
Diplacus layneae Layne's monkeyflower Annual herb  
Diplacus nanus Dwarf monkey flower Annual herb  
Diplacus rattanii Rattan's monkeyflower Annual herb  
Diplacus tricolor Tricolor monkeyflower Annual herb  
Downingia bella Hoover's downingia Annual herb  
Downingia elegans Elegant downingia Annual herb  
Downingia insignis Harlequin downingia Annual herb  
Downingia ornatissima Horned downingia Annual herb  
Downingia ornatissima var. ornatissima Horned downingia Annual herb  
Downingia pulchella Flatface downingia Annual herb  
Downingia willamettensis Cascade downingia Annual herb  
Eclipta prostrata False daisy Annual herb 1
Elatine californica California waterwort Annual, Perennial herb  
Elatine rubella Southwestern waterwort Annual herb  
Eleocharis engelmannii Engelmann's spikerush Annual grass  
Eleocharis obtusa var. engelmannii Engelmann's spikerush Annual grass  
Emmenanthe penduliflora Whispering bells Annual herb 2
Emmenanthe penduliflora var. penduliflora Whispering bells Annual herb  
Epilobium brachycarpum Willow herb Annual herb 1
Epilobium campestre Smooth boisduvalia Annual herb  
Epilobium cleistogamum Cleistogamous boisduvalia Annual herb  
Epilobium densiflorum Willow herb Annual herb 1
Epilobium foliosum California willowherb Annual herb  
Epilobium minutum Minute willowherb Annual herb  
Epilobium paniculatum var. jucundum Autumn willowherb Annual herb 1
Epilobium pygmaeum Smooth boisduvalia Annual herb  
Epilobium torreyi Narrow boisduvalia Annual herb  
Eragrostis hypnoides Teal lovegrass Annual grass  
Eragrostis pectinacea Tufted lovegrass Annual grass  
Eragrostis pectinacea var. pectinacea Tufted lovegrass Annual grass  
Eremocarpus setigerus Turkey mullein Annual herb 4
Eriastrum abramsii Abrams' eriastrum Annual herb  
Eriastrum brandegeae Brandegee's eriastrum Annual herb  
Eriastrum brandegeeae Brandegee's eriastrum Annual herb  
Eriastrum tracyi Tracy's eriastrum Annual herb  
Erigeron canadensis Canada horseweed Annual herb  
Eriogonum ampullaceum Mono buckwheat Annual herb  
Eriogonum covilleanum Coville's buckwheat Annual herb  
Eriogonum dasyanthemum Chaparral buckwheat Annual herb  
Eriogonum hirtiflorum Hairy flowered buckwheat Annual herb  
Eriogonum luteolum Wicker buckwheat Annual herb  
Eriogonum luteolum var. luteolum Golden buckwheat Annual herb  
Eriogonum spergulinum Wild buckwheat Annual herb  
Eriogonum spergulinum var. reddingianum Spurry buckwheat Annual herb  
Eriogonum vimineum Wicker stemmed eriogonum Annual herb 1
Erodium macrophyllum Large leaved filaree Annual herb  
Erythranthe arvensis Annual herb  
Erythranthe bicolor Yellow and white monkeyflower Annual herb  
Erythranthe breweri Brewer's monkeyflower Annual herb  
Erythranthe floribunda Many flowered monkey flower Annual herb 1
Erythranthe glaucescens shield-bracted monkeyflower Annual herb  
Erythranthe guttata Yellow monkey flower Annual, Perennial herb (rhizomatous) 36
Erythranthe latidens Broad toothed monkeyflower Annual herb  
Erythranthe microphylla Small leaved monkeyflower Annual herb  
Erythranthe nudata bare monkeyflower Annual herb  
Eschscholzia caespitosa Tufted eschscholzia Annual herb 15
Eschscholzia californica California poppy Annual, Perennial herb 50
Eschscholzia lobbii Frying pans Annual herb 4
Eschscholzia rhombipetala Diamond petaled california poppy Annual herb  
Euphorbia crenulata Chinesecaps Annual, Perennial herb  
Euphorbia ocellata Contura creek spurge Annual herb  
Euphorbia ocellata ssp. rattanii Stony creek spurge Annual herb  
Euphorbia serpillifolia Thyme-leafed spurge Annual herb  
Euphorbia serpillifolia ssp. hirtula Hairy thyme leafed spurge Annual, Perennial herb  
Euphorbia serpillifolia ssp. serpillifolia Thyme leafed spurge Annual, Perennial herb  
Euphorbia spathulata Reticulate seeded spurge Annual herb  
Extriplex joaquinana San Joaquin spearscale Annual herb  
Festuca microstachys Small fescue Annual grass  
Festuca octoflora Sixweeks grass Annual grass 5
Filago californica California filago Annual herb  
Galium aparine Cleavers Annual herb  
Galium bifolium Low mountain bedstraw Annual herb  
Gayophytum diffusum Spreading groundsmoke Annual herb  
Gayophytum diffusum ssp. parviflorum Small flowered groundsmoke Annual herb  
Gayophytum heterozygum Zig zag gayophytum Annual herb  
Gayophytum humile Dwarf groundsmoke Annual herb  
Gayophytum racemosum Black foot gayophytum Annual herb  
Geranium carolinianum Carolina geranium Annual herb  
Gilia capitata Blue field gilia Annual herb 19
Gilia capitata ssp. abrotanifolia Ball gilia Annual herb  
Gilia capitata ssp. capitata Blue field gilia Annual herb 2
Gilia capitata ssp. mediomontana Blue field gilia Annual herb  
Gilia clivorum Purple spot gilia Annual herb  
Gilia leptalea Bridges' gilia Annual herb  
Gilia leptalea ssp. leptalea Bridges gilia Annual herb  
Gilia sinistra Clockwise gilia Annual herb  
Gilia sinistra ssp. pinnatisecta Cut leaf clockwise gilia Annual herb  
Gilia tricolor Bird's eyes Annual herb 15
Gilia tricolor ssp. diffusa Bird's eyes Annual herb  
Gilia tricolor ssp. tricolor Bird's eyes Annual herb 1
Githopsis specularioides Venus' looking glass Annual herb  
Gnaphalium californicum California everlasting Annual, Perennial herb 14
Gnaphalium palustre Lowland cudweed Annual herb  
Gnaphalium stramineum Cotton batting Annual, Perennial herb 4
Guillenia flavescens Yellow california mustard Annual herb 1
Guillenia lasiophylla Shaggy thelypod Annual herb  
Harmonia hallii Hall's harmonia Annual herb  
Harmonia stebbinsii Stebbins's harmonia Annual herb  
Helianthus annuus Hairy leaved sunflower Annual herb 16
Helianthus bolanderi Bolander's sunflower Annual, Perennial herb 2
Helianthus exilis Serpentine sunflower Annual herb 2
Hemizonella minima Opposite leaved tarweed Annual herb  
Hemizonia congesta Hayfield tarweed Annual herb 5
Hemizonia congesta ssp. clevelandii Cleveland's tarweed Annual herb  
Hemizonia congesta ssp. luzulifolia Woodrush tarweed Annual herb 6
Hemizonia congesta ssp. tracyi Tracy's tarplant Annual herb  
Hemizonia fitchii Spikeweed Annual herb  
Hemizonia parryi Parry's tarweed Annual herb 1
Hemizonia parryi ssp. parryi Parry's tarweed Annual herb  
Hemizonia parryi ssp. rudis Parry's red tarplant Annual herb  
Hemizonia pungens Common spikeweed Annual herb 1
Hemizonia pungens ssp. maritima Maritime spikeweed Annual herb  
Hemizonia pungens ssp. pungens Common tarweed Annual herb  
Hemizonia pungens ssp. septentrionalis Northern spikeweed Annual herb  
Hesperevax acaulis Dwarf evax Annual herb  
Hesperevax acaulis var. acaulis Dwarf evax Annual herb  
Hesperevax acaulis var. robustior Big evax Annual herb  
Hesperevax caulescens Hogwallow starfish Annual herb  
Hesperevax sparsiflora Few flowered evax Annual herb  
Hesperevax sparsiflora var. sparsiflora Few flowered evax Annual herb  
Hesperocnide tenella Western stinging nettle Annual herb  
Hesperolinon bicarpellatum Two carpellate western flax Annual herb  
Hesperolinon californicum California western flax Annual herb  
Hesperolinon congestum Marin western flax Annual herb  
Hesperolinon didymocarpum Lake county western flax Annual herb  
Hesperolinon disjunctum Coast range western flax Annual herb  
Hesperolinon drymarioides Drymaria like western flax Annual herb  
Hesperolinon micranthum Small flower western flax Annual herb  
Hesperolinon spergulinum Slender western flax Annual herb  
Heterocodon rariflorum Heterocodon Annual herb  
Heterodraba unilateralis Ladiestongue mustard Annual herb  
Holocarpha virgata Narrow tarplant Annual herb  
Holocarpha virgata ssp. virgata Narrow tarplant Annual herb  
Hordeum depressum Alkali barley Annual grass 3
Juncus bufonius Common toad rush Annual grass 6
Juncus bufonius var. bufonius Toad rush Annual grass  
Juncus bufonius var. congestus Clustered toad rush Annual grass 1
Juncus hemiendytus Dwarf rush Annual grass  
Laennecia coulteri Coulter's horseweed Annual herb  
Lagophylla minor Little hareleaf Annual herb  
Lagophylla ramosissima Common hareleaf Annual herb  
Lagophylla ramosissima ssp. congesta Clustered hareleaf Annual herb  
Lagophylla ramosissima ssp. ramosissima Common hareleaf Annual herb  
Lasthenia californica Goldfields Annual herb 13
Lasthenia ferrisiae Alkali goldfields Annual herb  
Lasthenia fremontii Vernal pool goldfields Annual, Perennial herb  
Lasthenia glaberrima Smooth goldfields Annual herb  
Lasthenia glabrata Yellow rayed goldfields Annual herb 9
Lasthenia glabrata ssp. coulteri Goldfields Annual herb  
Lasthenia glabrata ssp. glabrata Yellow rayed goldfields Annual herb  
Lasthenia gracilis Needle goldfields Annual herb  
Lasthenia minor Coastal goldfields Annual herb 1
Lasthenia platycarpha Alkali goldfields Annual herb  
Layia chrysanthemoides Smooth tidy tips Annual herb 1
Layia fremontii Fremont's tidy tips Annual herb  
Layia gaillardioides Woodland layia Annual herb 4
Layia platyglossa Tidy tips Annual herb 20
Layia septentrionalis Colusa layia Annual herb  
Lepidium acutidens Net pepper grass Annual, Perennial herb  
Lepidium dictyotum Net pepper grass Annual herb  
Lepidium dictyotum var. acutidens Net pepper grass Annual herb  
Lepidium dictyotum var. dictyotum Net pepper grass Annual herb  
Lepidium lasiocarpum Shaggyfruit pepperweed Annual herb  
Lepidium latipes Dwarf pepper grass Annual herb  
Lepidium latipes var. latipes Dwarf pepper grass Annual herb  
Lepidium nitidum Shining pepper grass Annual herb 2
Lepidium nitidum var. nitidum Shining pepper grass Annual herb  
Lepidium oxycarpum Sharp podded pepper grass Annual herb  
Lepidium strictum Peppergrass Annual herb  
Leptochloa fascicularis Sprangletop Annual grass  
Leptochloa fusca Sprangletop Annual grass  
Leptochloa fusca ssp. fascicularis Bearded sprangletop Annual grass  
Leptosiphon acicularis Bristly leptosiphon Annual herb  
Leptosiphon androsaceus False babystars Annual herb 1
Leptosiphon bicolor True babystars Annual herb  
Leptosiphon bolanderi Bolander's linanthus Annual herb  
Leptosiphon ciliatus Whiskerbrush Annual herb 1
Leptosiphon ciliatus ssp. ciliatus Whiskerbrush Annual herb  
Leptosiphon filipes Thread linanthus Annual herb  
Leptosiphon grandiflorus Large flowered leptosiphon Annual herb 16
Leptosiphon harknessii Harkness' flaxflower Annual herb  
Leptosiphon jepsonii Jepson's leptosiphon Annual herb  
Leptosiphon latisectus Broad lobed leptosiphon Annual herb  
Leptosiphon montanus Mustang clover Annual herb  
Leptosiphon nudatus Tehachapi linanthus Annual herb  
Leptosiphon parviflorus Variable linanthus Annual herb 1
Leptosiphon pygmaeus Pygmy linanthus Annual herb  
Leptosiphon pygmaeus ssp. continentalis Pygmy linanthus Annual herb  
Leptosiphon pygmaeus ssp. pygmaeus Pygmy leptosiphon Annual herb  
Leptosiphon rattanii Rattan's leptosiphon Annual herb  
Lessingia micradenia Little glandular lessingia Annual herb  
Lessingia micradenia var. glabrata Smooth lessingia Annual herb  
Lessingia nemaclada Thread stem lessingia Annual herb  
Lessingia ramulosa Sonoma lessingia Annual herb  
Limnanthes alba White meadowfoam Annual herb 1
Limnanthes alba ssp. alba Typical white meadowfoam Annual herb  
Limnanthes douglasii Common meadow foam Annual herb 8
Limnanthes douglasii ssp. nivea Snow white meadowfoam Annual herb 3
Limnanthes douglasii ssp. rosea Rosy douglas' meadowfoam Annual herb 3
Limosella acaulis Stemless mudwort Annual herb  
Linanthus acicularis Bristly linanthus Annual herb  
Linanthus androsaceus Common linanthus Annual herb 1
Linanthus bicolor True baby stars Annual herb  
Linanthus bolanderi Bolander's linanthus Annual herb  
Linanthus ciliatus Whisker brush linanthus Annual herb 1
Linanthus dichotomus Evening snow Annual herb  
Linanthus dichotomus ssp. meridianus Evening snow Annual herb  
Linanthus filipes Filiform linanthus Annual herb  
Linanthus grandiflorus Large flower linanthus Annual herb 16
Linanthus harknessii Harkness linanthus Annual herb  
Linanthus jepsonii Jepson's linanthus Annual herb  
Linanthus latisectus Napa linanthus Annual herb  
Linanthus montanus Mustang clover Annual herb  
Linanthus nudatus Tehachapi linanthus Annual herb  
Linanthus parviflorus Common linanthus Annual herb 1
Linanthus pygmaeus Pygmy linanthus Annual herb  
Linanthus pygmaeus ssp. continentalis Pygmy linanthus Annual herb  
Linanthus rattanii Rattan's linanthus Annual herb  
Linaria canadensis Toad flax Annual, Perennial herb 1
Linaria canadensis var. texana Toad flax Annual, Perennial herb 1
Lipocarpha occidentalis Western hemicarpha Annual grass  
Logfia filaginoides California cottonrose Annual herb  
Lotus denticulatus Toothed lotus Annual herb  
Lotus hamatus Small flowered lotus Annual herb 2
Lotus humistratus Short podded lotus Annual herb  
Lotus micranthus Hill lotus Annual herb  
Lotus purshianus Bird's foot trefoil Annual herb 6
Lotus purshianus var. purshianus Spanish lotus Annual herb 1
Lotus rubriflorus Red flowered lotus Annual herb  
Lotus unifoliolatus American bird's foot trefoil Annual herb 2
Lotus unifoliolatus var. unifoliolatus American bird's foot trefoil Annual herb  
Lotus wrangelianus Chilean trefoil Annual herb  
Lupinus affinis Fleshy lupine Annual herb  
Lupinus bicolor Lupine Annual, Perennial herb 16
Lupinus luteolus Butter lupine Annual herb 1
Lupinus microcarpus Chick lupine Annual herb 9
Lupinus microcarpus var. densiflorus Chick lupine Annual herb 13
Lupinus microcarpus var. microcarpus Chick lupine Annual herb 3
Lupinus milo-bakeri Milo baker's lupine Annual herb 1
Lupinus nanus Valley sky lupine Annual herb 11
Lupinus pachylobus Big pod lupine Annual herb  
Lupinus succulentus Arroyo lupine Annual herb 22
Madia citriodora Lemon scented tarweed Annual herb  
Madia elegans Common madia Annual herb 14
Madia elegans ssp. densifolia Leafy common madia Annual herb 12
Madia elegans ssp. elegans Common madia Annual herb 1
Madia exigua Small tarweed Annual herb 1
Madia gracilis Gumweed Annual herb 1
Madia hallii Hall's madia Annual herb  
Madia minima Little tarweed Annual herb  
Madia sativa Coastal tarweed Annual herb  
Madia stebbinsii Stebbins's madia Annual herb  
Malacothrix californica Desert dandelion Annual herb  
Malacothrix clevelandii Cleveland's malacothrix Annual herb  
Malacothrix floccifera Woolly malacothrix Annual herb 1
Matricaria discoidea Pineapple weed Annual herb 3
Mentzelia dispersa Scattered blazing star Annual herb  
Mentzelia micrantha Small flowered stickleaf Annual herb 2
Micropus amphibolus Mt. diablo cottonweed Annual herb  
Micropus californicus Q tips Annual herb 1
Micropus californicus var. californicus Slender cottonweed Annual herb  
Microseris acuminata Sierra foothills microseris Annual herb 1
Microseris campestris San joaquin microseris Annual herb  
Microseris douglasii Douglas' microseris Annual herb  
Microseris douglasii ssp. douglasii Douglas' microseris Annual herb  
Microseris douglasii ssp. tenella Short scaled microseris Annual herb  
Microseris elegans Elegant silverpuffs Annual herb  
Microsteris gracilis Slender phlox Annual herb  
Microsteris gracilis var. gracilis Slender phlox Annual herb  
Mimetanthe pilosa Snouted monkey flower Annual herb  
Mimulus bicolor Yellow and white monkeyflower Annual herb  
Mimulus bolanderi Bolander's monkeyflower Annual herb  
Mimulus brachiatus Serpentine monkeyflower Annual herb  
Mimulus brevipes Wide throated yellow monkeyflower Annual herb 2
Mimulus breweri Brewer's monkeyflower Annual herb  
Mimulus douglasii Purple mouse ears Annual herb 1
Mimulus floribundus Many flowered monkey flower Annual herb 1
Mimulus glaucescens Shield bracted monkeyflower Annual herb  
Mimulus guttatus Yellow monkey flower Annual, Perennial herb (rhizomatous) 36
Mimulus kelloggii Kellogg's monkeyflower Annual herb  
Mimulus latidens Broad toothed monkeyflower Annual herb  
Mimulus layneae Layne's monkeyflower Annual herb  
Mimulus microphyllus Small leaved monkeyflower Annual herb 35
Mimulus nanus Dwarf monkey flower Annual herb  
Mimulus nudatus Bare monkeyflower Annual herb  
Mimulus parishii Parish mimulus Annual herb 35
Mimulus pilosus Snouted monkey flower Annual herb  
Mimulus rattanii Rattan's monkeyflower Annual herb  
Mimulus tricolor Tricolor monkeyflower Annual herb  
Minuartia californica Sandwort Annual herb  
Minuartia douglasii Douglas' sandwort Annual herb  
Monolopia major Cupped monolopia Annual herb  
Montia fontana Water montia Annual herb  
Muhlenbergia filiformis Slender muhly Annual, Perennial grass  
Myosurus minimus Little mouse tail Annual herb  
Myosurus minimus ssp. apus Little mouse tail Annual herb  
Myosurus sessilis Tiny mouse tail Annual herb  
Najas guadalupensis Guadalupe water nymph Annual herb  
Navarretia atractyloides Holly leaf navarretia Annual herb  
Navarretia cotulifolia Broad leaved navarretia Annual herb  
Navarretia divaricata Mountain navarretia Annual herb  
Navarretia divaricata ssp. vividior Mountain navarretia Annual herb  
Navarretia eriocephala Hoary navarretia Annual herb  
Navarretia heterandra Tehama navarretia Annual herb  
Navarretia intertexta Interwoven navarretia Annual herb  
Navarretia intertexta ssp. intertexta Interwoven navarretia Annual herb  
Navarretia jepsonii Jepson's navarretia Annual herb  
Navarretia leptalea Bridges' pincushionplant Annual herb  
Navarretia leptalea ssp. leptalea Bridges' gilia Annual herb  
Navarretia leucocephala White headed navarretia Annual herb  
Navarretia leucocephala ssp. bakeri Baker's navarretia Annual herb  
Navarretia leucocephala ssp. leucocephala White headed navarretia Annual herb  
Navarretia linearifolia Navarretia Annual herb  
Navarretia linearifolia ssp. pinnatisecta Pinnate-leaved navarretia Annual herb  
Navarretia mellita Skunk navarretia Annual herb  
Navarretia nigelliformis Adobe navarretia Annual herb  
Navarretia nigelliformis ssp. nigelliformis Adobe navarretia Annual herb  
Navarretia nigelliformis ssp. radians Shining navarretia Annual herb  
Navarretia paradoxiclara Navarretia Annual herb  
Navarretia paradoxinota Navarretia Annual herb  
Navarretia pubescens Purple navarretia Annual herb  
Navarretia sinistra Alva day's pincushionplant Annual herb  
Navarretia sinistra ssp. pinnatisecta Pinnate leaved navarretia Annual herb  
Navarretia sinistra ssp. sinistra Alva day's gilia Annual herb  
Navarretia tagetina Marigold navarretia Annual herb  
Navarretia viscidula Sticky navarretia Annual herb  
Navarretia vividior Mountain navarretia Annual herb  
Nemacladus capillaris Common nemacladus Annual herb  
Nemacladus montanus Mountain nemacladus Annual herb  
Nemophila heterophylla Canyon nemophila Annual herb  
Nemophila menziesii Baby blue eyes Annual herb 18
Nemophila menziesii var. menziesii Baby blue eyes Annual herb  
Nemophila parviflora Small flowered nemophila Annual herb  
Nemophila parviflora var. parviflora Small flowered nemophila Annual herb  
Nemophila pedunculata Meadow nemophila Annual herb  
Neostapfia colusana Colusa grass Annual grass  
Nicotiana bigelovii var. wallacei Indian tobacco Annual herb  
Nicotiana quadrivalvis Indian tobacco Annual herb 2
Nuttallanthus texanus Blue toadflax Annual, Perennial herb 1
Orobanche vallicola Valley broom rape Annual herb  
Panicum capillare Old witch grass Annual grass 2
Parvisedum pentandrum Central california stonecrop Annual herb  
Parvisedum pumilum Sierra stonecrop Annual herb  
Pectocarya penicillata Winged pectocarya Annual herb  
Pectocarya pusilla Little pectocarya Annual herb  
Pectocarya setosa Moth combseed Annual herb 1
Pentachaeta exilis Slender pentachaeta Annual herb  
Pentachaeta exilis ssp. exilis Slender pentachaeta Annual herb  
Persicaria lapathifolia Common knotweed Annual herb  
Phacelia campanularia Desert bells Annual herb 18
Phacelia ciliata Great valley phacelia Annual herb 1
Phacelia ciliata var. ciliata Great valley phacelia Annual herb  
Phacelia distans Common phacelia Annual herb 3
Phacelia divaricata Divaricate phacelia Annual herb  
Phacelia imbricata var. bernardina Bernadina Phacelia Annual herb  
Phacelia imbricata var. imbricata Imbricate Phacelia Annual herb  
Phacelia tanacetifolia Tansy leafed phacelia Annual herb 15
Phlox gracilis Annual phlox Annual herb  
Physalis acutifolia Sharp leaf ground cherry Annual herb 1
Plagiobothrys austiniae Rebecca austin's allocarya Annual herb  
Plagiobothrys bracteatus Bracted allocarya Annual herb  
Plagiobothrys canescens Valley popcorn Annual herb 1
Plagiobothrys cusickii Cusick's popcorn flower Annual herb  
Plagiobothrys distantiflorus California popcorn flower Annual herb  
Plagiobothrys fulvus Fulvous popcorn flower Annual herb  
Plagiobothrys fulvus var. campestris Tawny popcorn flower Annual herb  
Plagiobothrys greenei Greene's allocarya Annual herb  
Plagiobothrys humistratus Dwarf allocarya Annual herb  
Plagiobothrys infectivus Dye popcorn flower Annual herb  
Plagiobothrys leptocladus Alkali plagiobothrys Annual herb  
Plagiobothrys nothofulvus Rusty haired popcorn flower Annual herb  
Plagiobothrys scouleri var. cusickii Cusick's popcornflower Annual herb  
Plagiobothrys scriptus Scribe's allocarya Annual herb  
Plagiobothrys shastensis Shasta popcorn flower Annual herb  
Plagiobothrys stipitatus Vernal pool allocarya Annual herb  
Plagiobothrys stipitatus var. micranthus Common vernal pool allocarya Annual herb  
Plagiobothrys stipitatus var. stipitatus Vernal pool allocarya Annual herb  
Plagiobothrys tenellus Slender popcorn flower Annual herb  
Planodes virginicum Common rock cress Annual, Perennial herb  
Plantago bigelovii Long leaf plantain Annual herb  
Plantago elongata Coastal plantain Annual herb  
Plantago erecta California plantain Annual herb 6
Platystemon californicus Cream cups Annual herb 3
Plectritis brachystemon Short spurred plectritis Annual herb  
Plectritis ciliosa Long spurred plectritis Annual herb  
Plectritis ciliosa ssp. ciliosa Long spurred plectritis Annual herb  
Plectritis congesta Sea blush Annual herb 1
Plectritis congesta ssp. brachystemon Shortspur seablush Annual herb  
Plectritis macrocera Plectritis Annual herb  
Poa bolanderi Bolander's bluegrass Annual grass  
Poa howellii Howell's blue grass Annual grass  
Pogogyne douglasii Douglas' pogogyne Annual herb  
Pogogyne serpylloides Thyme leaf mesa mint Annual herb  
Pogogyne zizyphoroides Sacramento mint Annual herb  
Polanisia dodecandra Redwhisker clammyweed Annual herb 1
Polanisia dodecandra ssp. trachysperma Clammy weed Annual herb  
Polygonum douglasii Douglas' knotweed Annual herb  
Polygonum douglasii ssp. douglasii Douglas' knotweed Annual herb  
Polygonum douglasii ssp. johnstonii Knotweed Annual herb  
Polygonum lapathifolium Common knotweed Annual herb  
Polygonum minimum Little mountain knotweed Annual herb  
Polygonum parryi Parry's knotweed Annual herb  
Polygonum polygaloides Milkwort knotweed Annual herb  
Polygonum polygaloides ssp. kelloggii Kellogg's knotweed Annual herb  
Polygonum sawatchense Knotweed Annual herb  
Polygonum sawatchense ssp. sawatchense Knotweed Annual, Perennial herb  
Pseudognaphalium californicum Ladies' tobacco Annual, Perennial herb 13
Psilocarphus brevissimus Woolly marbles Annual herb  
Psilocarphus brevissimus var. brevissimus Woolly heads Annual herb  
Psilocarphus oregonus Woolly marbles Annual herb  
Psilocarphus tenellus Slender woolly heads Annual herb  
Psilocarphus tenellus var. tenellus Slender woolly heads Annual herb  
Pterostegia drymarioides Fairy mist Annual herb  
Puccinellia simplex California alkaligrass Annual grass  
Rafinesquia californica California chicory Annual herb  
Ranunculus hebecarpus Pubescent fruited buttercup Annual herb  
Ranunculus uncinatus Hooked fruit buttercup Annual, Perennial herb  
Ranunculus uncinatus var. parviflorus Small flowered hooked fruit buttercup Annual, Perennial herb  
Rigiopappus leptocladus Wire weed Annual herb  
Rorippa curvipes Bluntleaf yellow cress Annual herb  
Rorippa curvipes var. truncata Blunt yellow cress Annual herb  
Rorippa curvisiliqua Curvepod yellow cress Annual, Perennial herb  
Rorippa palustris Bog yellow cress Annual, Perennial herb  
Rotala ramosior Lowland rotala Annual herb  
Sagina decumbens Trailing pearlwort Annual herb  
Sagina decumbens ssp. occidentalis Western pearlwort Annual herb  
Salicornia depressa Virginia glasswort Annual herb 7
Salvia columbariae Chia sage Annual herb 11
Scribneria bolanderi Scribneria Annual grass  
Sedella pentandra Mt. Hamilton mock stonecrop Annual herb  
Sedella pumila Sierra mock stonecrop Annual herb  
Sibara virginica Common rock cress Annual, Perennial herb  
Sidalcea calycosa Checker mallow Annual herb 3
Sidalcea calycosa ssp. calycosa Checker mallow Annual herb  
Sidalcea diploscypha Fringed checker mallow Annual herb  
Sidalcea hartwegii Hartweg's checkerbloom Annual herb  
Sidalcea hirsuta Hairy checkerbloom Annual herb  
Sidalcea keckii Keck's checkerbloom Annual herb  
Silene antirrhina Sleepy catch fly Annual herb  
Silene californica California indian pink Annual herb 2
Silene verecunda Dolores campion Annual herb  
Silene verecunda ssp. platyota San francisco campion Annual herb  
Solanum americanum White nightshade Annual, Perennial herb 2
Spergularia marina Salt sand spurry Annual herb 1
Spergularia salina Salt sandspurry Annual herb 1
Stellaria nitens Shining chickweed Annual herb  
Stephanomeria paniculata Stiff branched stephanomeria Annual herb  
Stephanomeria virgata Twiggy wreath plant Annual herb 1
Stephanomeria virgata ssp. pleurocarpa Tall stephanomeria Annual herb  
Streptanthus albidus ssp. peramoenus Most beautiful jewel flower Annual herb 1
Streptanthus barbiger Bearded jewelflower Annual herb  
Streptanthus breweri Brewer's jewelflower Annual herb  
Streptanthus breweri var. breweri Brewer's jewelflower Annual herb  
Streptanthus breweri var. hesperidis Brewer's jewelflower Annual herb  
Streptanthus drepanoides Sickle fruit jewel flower Annual herb  
Streptanthus glandulosus Bristly jewelflower Annual herb 2
Streptanthus glandulosus ssp. glandulosus Jewelflower Annual herb 1
Streptanthus hesperidis Green jewel-flower Annual herb  
Symphyotrichum subulatum Eastern annual saltmarsh aster Annual herb  
Tetrapteron graciliflorum Hill sun cup Annual herb  
Thysanocarpus curvipes Common fringe pod Annual herb 2
Thysanocarpus curvipes ssp. curvipes Fringe Pod Annual herb  
Thysanocarpus laciniatus Narrow leaved lacepod Annual herb 1
Tonella tenella Small flowered tonella Annual herb  
Trichocoronis wrightii Limestone bugheal Annual herb  
Trichocoronis wrightii var. wrightii Wright's trichocoronis Annual herb  
Trichostema lanceolatum Vinegarweed Annual herb 2
Trichostema laxum Turpentine weed Annual herb  
Trichostema oblongum Mountain bluecurls Annual herb  
Trifolium albopurpureum Indian clover Annual herb 2
Trifolium albopurpureum var. albopurpureum Indian clover Annual herb 2
Trifolium albopurpureum var. dichotomum Clover Annual herb  
Trifolium albopurpureum var. olivaceum Owl's clover Annual herb  
Trifolium bifidum Notch leaf clover Annual herb 2
Trifolium bifidum var. bifidum Pinole clover Annual herb 2
Trifolium bifidum var. decipiens Notch leaf clover Annual herb 2
Trifolium ciliolatum Tree clover Annual herb 6
Trifolium columbinum Olive clover Annual herb  
Trifolium cyathiferum Cup clover Annual herb  
Trifolium depauperatum Dwarf sack clover Annual herb  
Trifolium depauperatum var. amplectens Pale sack clover Annual herb  
Trifolium depauperatum var. depauperatum Dwarf bladder clover Annual herb  
Trifolium depauperatum var. truncatum Dwarf sack clover Annual herb  
Trifolium dichotomum Branched indian clover Annual herb  
Trifolium fucatum Bull clover Annual herb 5
Trifolium gracilentum Pin point clover Annual herb 4
Trifolium gracilentum var. gracilentum Pin point clover Annual herb 4
Trifolium microcephalum Small head clover Annual herb 4
Trifolium microdon Valparaiso clover Annual herb  
Trifolium obtusiflorum Creek clover Annual herb 5
Trifolium olivaceum Olive clover Annual herb  
Trifolium trichocalyx Monterey clover Annual herb  
Trifolium variegatum Variegated clover Annual herb 1
Trifolium variegatum var. variegatum Variegated clover Annual herb  
Trifolium willdenovii Tomcat clover Annual herb 8
Triodanis biflora Venus looking glass Annual herb  
Triphysaria eriantha Butter 'n' eggs Annual herb 1
Triphysaria eriantha ssp. eriantha Butter 'n' eggs Annual herb  
Triphysaria pusilla Little owl's clover Annual herb  
Triphysaria versicolor Yellow owl's clover Annual herb 1
Triphysaria versicolor ssp. faucibarbata Yellow owl's clover Annual herb  
Triphysaria versicolor ssp. versicolor Yellow owl's clover Annual herb  
Tropidocarpum gracile Slender tropidocarpum Annual herb  
Uropappus lindleyi Silver puffs Annual herb 1
Veronica peregrina Neckweed Annual herb  
Veronica peregrina ssp. xalapensis Speedwell Annual herb  
Vulpia microstachys Fescue Annual grass 6
Vulpia microstachys var. ciliata Eastwood fescue Annual grass  
Vulpia microstachys var. confusa Tracy's fescue Annual grass  
Vulpia microstachys var. microstachys Small fescue Annual grass  
Vulpia microstachys var. pauciflora Few flowered fescue Annual grass  
Vulpia octoflora Slender fescue Annual grass 5
Vulpia octoflora var. hirtella Six weeks fescue Annual grass 1
Vulpia octoflora var. octoflora Six weeks fescue Annual grass  
Xanthium strumarium Cocklebur Annual herb  
Yabea microcarpa Hedge parsley Annual herb  
Zeltnera davyi Davy's centaury Annual herb 1
Zeltnera muehlenbergii Muehlenberg's centaury Annual herb 2
Zeltnera trichantha Alkali centaury Annual herb  
Zeltnera venusta Charming centaury Annual herb  
  Lifeform: Perennial943 plants
  Lifeform: Fern43 plants
Adiantum jordanii Adiantum Fern 4
Aspidotis densa Lace fern Fern 1
Athyrium filix-femina Common ladyfern Fern 19
Athyrium filix-femina ssp. cyclosorum Subarctic ladyfern Fern  
Athyrium filix-femina var. cyclosorum Western lady fern Fern 1
Azolla filiculoides Mosquito fern Fern  
Azolla mexicana Mexican mosquito fern Fern  
Azolla microphylla Mexican mosquito fern Fern  
Botrychium crenulatum Scalloped moonwort Fern (rhizomatous)  
Cheilanthes covillei Coville's lip fern Fern 4
Cheilanthes gracillima Lace lip fern Fern 1
Cheilanthes intertexta Coastal lipfern Fern  
Cryptogramma acrostichoides American parsley fern Fern  
Cystopteris fragilis Brittle fern Fern 1
Equisetum arvense Common horsetail Fern 6
Equisetum hyemale Scouringrush horsetail Fern 31
Equisetum hyemale ssp. affine Giant scouring rush Fern 7
Equisetum hyemale var. affine Scouringrush horsetail Fern 4
Equisetum laevigatum Smooth scouring rush Fern 2
Equisetum telmateia Giant horsetail Fern 3
Equisetum telmateia ssp. braunii Giant horsetail Fern 1
Equisetum telmateia var. braunii Giant horsetail Fern 1
Isoetes bolanderi Bolander's quillwort Fern  
Marsilea vestita Hairy waterclover Fern 6
Marsilea vestita ssp. vestita Hairy pepperwort Fern 5
Myriopteris covillei Coville's lip fern Fern 4
Myriopteris gracillima Lace lip fern Fern 1
Myriopteris intertexta Coastal lip fern Fern  
Pellaea andromedifolia Coffee fern Fern 3
Pellaea brachyptera Sierra cliff brake Fern  
Pellaea mucronata Bird's foot fern Fern 2
Pellaea mucronata var. mucronata Bird's foot fern Fern  
Pentagramma triangularis Gold back fern Fern 3
Pentagramma triangularis ssp. semipallida Pale gold back fern Fern 3
Pentagramma triangularis ssp. triangularis Gold back fern Fern  
Pilularia americana Pillwort Fern  
Polystichum imbricans Narrow leaved sword fern Fern 1
Polystichum imbricans ssp. curtum Cliff sword fern Fern  
Polystichum imbricans ssp. imbricans Rock sword fern Fern  
Polystichum munitum Western sword fern Fern 43
Pteridium aquilinum Western brackenfern Fern 5
Pteridium aquilinum var. pubescens Western bracken fern Fern  
Woodwardia fimbriata Western chain fern Fern 31
  Lifeform: Shrub206 plants
Adenostoma fasciculatum Chamise Tree, Shrub 15
Adenostoma fasciculatum var. fasciculatum Chamise Tree, Shrub 2
Alnus incana Gray alder Tree, Shrub 6
Alnus incana ssp. tenuifolia Creek alder Tree, Shrub 9
Amelanchier pallida Pallid service berry Shrub 3
Amelanchier utahensis Pale leaved serviceberry Shrub 10
Arctostaphylos canescens Hoary manzanita Shrub 1
Arctostaphylos canescens ssp. canescens Hoary manzanita Shrub  
Arctostaphylos canescens ssp. sonomensis Sonoma manzanita Shrub 1
Arctostaphylos glandulosa Eastwood manzanita Shrub 6
Arctostaphylos glandulosa f. cushingiana Cushing's manzanita Shrub  
Arctostaphylos glandulosa ssp. cushingiana Cushing manzanita Shrub  
Arctostaphylos glandulosa ssp. glandulosa Eastwood manzanita Shrub 3
Arctostaphylos glandulosa ssp. zacaensis Zaca lake manzanita Shrub 3
Arctostaphylos malloryi Balaklala manzanita Shrub  
Arctostaphylos manzanita Common manzanita Shrub 26
Arctostaphylos manzanita ssp. elegans Konocti manzanita Shrub  
Arctostaphylos manzanita ssp. manzanita Common manzanita Shrub 1
Arctostaphylos manzanita ssp. roofii Roof's manzanita Shrub  
Arctostaphylos nevadensis Pine mat manzanita Shrub 6
Arctostaphylos patula Green leaf manzanita Shrub 14
Arctostaphylos viscida Whiteleaf manzanita Tree, Shrub 6
Arctostaphylos viscida ssp. mariposa Mariposa manzanita Tree, Shrub 1
Arctostaphylos viscida ssp. pulchella White leaf manzanita Tree, Shrub  
Arctostaphylos viscida ssp. viscida Smooth white leaf manzanita Tree, Shrub 2
Aristolochia californica California pipevine Vine, Shrub 23
Atriplex lentiformis Big saltbush Shrub 34
Baccharis pilularis Coyote brush Shrub 57
Baccharis salicifolia Mule fat Shrub 26
Baccharis salicifolia ssp. salicifolia Mule fat Shrub 8
Berberis aquifolium Mountain grape Shrub 46
Berberis aquifolium var. dictyota Jepson's oregon grape Shrub 3
Berberis aquifolium var. repens Creeping oregon grape Shrub 30
Calycanthus occidentalis Spicebush Shrub 41
Ceanothus cordulatus Snow bush Shrub 7
Ceanothus cuneatus Buck brush Shrub 24
Ceanothus cuneatus var. cuneatus Buck brush Shrub 3
Ceanothus integerrimus Deer brush Shrub 15
Ceanothus integerrimus var. macrothyrsus Deerbrush Shrub 15
Ceanothus jepsonii Musk brush Shrub  
Ceanothus jepsonii var. albiflorus White flowered musk brush Shrub  
Ceanothus oliganthus Hairy ceanothus Shrub 5
Ceanothus oliganthus var. sorediatus Jim brush Shrub  
Ceanothus palmeri Palmer's ceanothus Shrub 1
Ceanothus parryi Parry ceanothus Shrub  
Ceanothus prostratus Mahala mats Shrub 10
Cephalanthus occidentalis Common buttonbush Shrub 14
Cephalanthus occidentalis var. californicus California buttonbush Shrub 14
Cercis occidentalis Western redbud Tree, Shrub 66
Cercocarpus betuloides Birch leaf mountain mahogany Tree, Shrub 45
Cercocarpus betuloides var. betuloides Birch leaf mountain mahogany Tree, Shrub 2
Cercocarpus ledifolius Desert mountainmahogany Tree, Shrub 18
Chrysothamnus nauseosus Common rabbitbrush Shrub 25
Chrysothamnus nauseosus ssp. albicaulis Rubber rabbitbrush Shrub  
Cornus glabrata Brown dogwood Tree, Shrub 10
Cornus sericea American dogwood Shrub 43
Cornus sericea ssp. occidentalis Western dogwood Shrub 9
Cornus sericea ssp. sericea Red osier dogwood Shrub 33
Crocanthemum aldersonii Alderson's rush-rose Shrub 12
Crocanthemum scoparium Bisbee Peak Rushrose Shrub 13
Crocanthemum scoparium var. scoparium Peak Rushrose Shrub 12
Crocanthemum scoparium var. vulgare Peak Rushrose Shrub 12
Cupressus macnabiana Macnab's cypress Tree, Shrub 7
Cupressus sargentii Sargent cypress Tree, Shrub 3
Dendromecon rigida Bush poppy Shrub 14
Diplacus aurantiacus Sticky monkeyflower Shrub 49
Ericameria greenei Greene's goldenbush Shrub 1
Ericameria linearifolia Interior goldenbush Shrub 6
Ericameria nauseosa Rubber rabbitbrush Shrub 25
Ericameria nauseosa var. speciosa Rubber rabbitbrush Shrub  
Eriodictyon californicum Yerba santa Shrub 11
Eriogonum fasciculatum California buckwheat Shrub 42
Eriogonum fasciculatum var. fasciculatum California buckwheat Shrub 3
Eriogonum nudum Naked buckwheat Shrub 15
Eriogonum nudum var. auriculatum Nude buckwheat Shrub 1
Eriogonum nudum var. nudum Nude buckwheat Shrub 1
Eriogonum tripodum Tripod buckwheat Shrub  
Euonymus occidentalis Western burning bush Tree, Shrub 7
Forestiera pubescens Desert olive Shrub 5
Frangula californica California coffeeberry Shrub 50
Frangula californica ssp. californica California coffeeberry Shrub 43
Frangula californica ssp. crassifolia Serpentine hoary coffeeberry Shrub  
Frangula californica ssp. tomentella Hoary coffeeberry Shrub 13
Frangula purshiana Cascara sagrada Tree, Shrub 19
Fraxinus dipetala Two petaled ash Tree, Shrub 7
Fraxinus jonesii California ash Tree, Shrub 7
Galium porrigens Climbing bedstraw Vine, Shrub  
Galium porrigens var. porrigens Graceful bedstraw Vine, Shrub  
Galium porrigens var. tenue Graceful bedstraw Vine, Shrub  
Garrya congdonii Silk tassel Shrub  
Garrya elliptica Coast silk tassel Tree, Shrub 31
Garrya flavescens Ashy silk tassel Shrub 1
Garrya fremontii Fremont's silk tassel Shrub 5
Garrya veatchii Southern silk tassel Shrub 1
Helianthemum scoparium Broom rose Shrub 13
Helianthemum suffrutescens Bisbee peak rush rose Shrub 12
Hesperocyparis macnabiana Macnab cypress Tree, Shrub 7
Hesperocyparis sargentii Sargent cypress Tree, Shrub 3
Heteromeles arbutifolia Toyon Shrub 64
Holodiscus discolor Oceanspray Shrub 42
Holodiscus discolor var. discolor Oceanspray Shrub 2
Holodiscus microphyllus Oceanspray Shrub 40
Holodiscus microphyllus var. glabrescens Rock spiraea Shrub 40
Holodiscus microphyllus var. microphyllus Little leaf creambush Shrub 40
Juniperus californica California juniper Shrub 4
Keckiella breviflora Gaping keckiella Shrub 4
Keckiella corymbosa Red beardtongue Shrub 2
Keckiella lemmonii Lemmon's keckiella Shrub  
Lepechinia calycina Pitcher sage Shrub 14
Leptodactylon pungens Prickly phlox Shrub  
Linanthus pungens Granite prickly phlox Shrub  
Lonicera interrupta Chaparral honeysuckle Vine, Shrub 5
Lonicera involucrata Coast twinberry Shrub 42
Lonicera involucrata var. ledebourii Coast twinberry Shrub 2
Lupinus albifrons Silver bush lupine Shrub 34
Lupinus albifrons var. albifrons Silver bush lupine Shrub 5
Lupinus albifrons var. collinus Silver bush lupine Shrub 8
Lupinus arboreus Coastal bush lupine Shrub 26
Malacothamnus fremontii Fremont's bush mallow Shrub 8
Malacothamnus helleri Heller's bush mallow Shrub 9
Mimulus aurantiacus Sticky monkeyflower Shrub 55
Mimulus aurantiacus var. aurantiacus Sticky monkeyflower Shrub 4
Mimulus puniceus Red bush monkeyflower Shrub 52
Monardella follettii Follett's monardella Shrub 1
Oemleria cerasiformis Oso berry Shrub 18
Phoradendron bolleanum Bollean mistletoe Shrub (parasitic)  
Phoradendron juniperinum Mistletoe Shrub (parasitic)  
Phoradendron leucarpum American mistletoe Shrub (parasitic)  
Phoradendron leucarpum ssp. macrophyllum Big leaf mistletoe Shrub (parasitic)  
Phoradendron leucarpum ssp. tomentosum Mistletoe Shrub (parasitic)  
Phoradendron libocedri Incense cedar mistletoe Shrub (parasitic)  
Phoradendron macrophyllum Big leaf mistletoe Shrub (parasitic)  
Phoradendron serotinum Mistletoe Shrub (parasitic)  
Phoradendron serotinum ssp. macrophyllum Big leaf mistletoe Shrub (parasitic)  
Phoradendron serotinum ssp. tomentosum Pacific mistletoe Shrub (parasitic)  
Phoradendron villosum Hairy mistletoe Shrub (parasitic)  
Pickeringia montana Chaparral pea Shrub 3
Pickeringia montana var. montana Chaparral pea Shrub  
Prunus emarginata Bitter cherry Tree, Shrub 15
Prunus subcordata Sierra plum Tree, Shrub 4
Prunus virginiana Chokecherry Tree, Shrub 29
Prunus virginiana var. demissa Western choke cherry Tree, Shrub 10
Prunus virginiana var. melanocarpa Black chokecherry Tree, Shrub 8
Ptelea crenulata Hop tree Tree, Shrub 4
Purshia tridentata Antelope bush Shrub 18
Purshia tridentata var. tridentata Antelope bitterbrush Shrub 18
Quercus dumosa Scrub oak Shrub 10
Quercus durata Leather oak Shrub 9
Quercus durata var. durata Leather oak Shrub 2
Quercus palmeri Palmer's oak Shrub  
Quercus vacciniifolia Huckleberry oak Shrub 5
Quercus wislizeni Interior live oak Tree, Shrub 22
Quercus wislizeni var. frutescens Live oak Tree, Shrub 1
Quercus wislizeni var. wislizeni Interior live oak Tree, Shrub 3
Rhamnus californica Coffee berry Shrub 61
Rhamnus californica ssp. californica California coffeeberry Shrub 10
Rhamnus ilicifolia Evergreen buckthorn Shrub 17
Rhamnus purshiana Cascara sagrada Tree, Shrub 17
Rhamnus tomentella Hoary coffeeberry Shrub 10
Rhamnus tomentella ssp. crassifolia Velvet leaf coffeeberry Shrub  
Rhamnus tomentella ssp. tomentella Chaparral coffee berry Shrub 6
Rhododendron occidentale Western azalea Tree, Shrub 22
Rhus aromatica Fragrant sumac Shrub 32
Rhus trilobata Skunkbrush Shrub 32
Rhus trilobata var. simplicifolia Single leaf skunkbrush Shrub 7
Ribes binominatum Trailing gooseberry Shrub  
Ribes californicum California gooseberry Shrub 8
Ribes divaricatum Spreading gooseberry Shrub 9
Ribes divaricatum var. pubiflorum Spreading gooseberry Shrub 2
Ribes lobbii Gummy gooseberry Shrub 2
Ribes malvaceum Chaparral currant Shrub 23
Ribes malvaceum var. malvaceum Chaparral currant Shrub 3
Ribes malvaceum var. viridifolium Chaparral currant Shrub 7
Ribes nevadense Mountain pink currant Shrub 11
Ribes quercetorum Oak gooseberry Shrub 2
Ribes roezlii Sierra gooseberry Shrub 10
Ribes roezlii var. cruentum Spiny fruited gooseberry Shrub 3
Rosa californica California wild rose Shrub 52
Rosa gymnocarpa Wood rose Shrub 21
Rubus leucodermis White bark raspberry Shrub 8
Rubus parviflorus Thimbleberry Vine, Shrub 38
Rubus ursinus California blackberry Vine, Shrub 38
Salix breweri Serpentine willow Shrub 1
Salix exigua Narrowleaf willow Tree, Shrub 26
Salix exigua var. hindsiana Sandbar willow Tree, Shrub 25
Salix hindsiana Sandbar willow Tree, Shrub 25
Salix lasiolepis Arroyo willow Tree, Shrub 23
Salix lucida Shining willow Tree, Shrub 19
Salix melanopsis Dusky willow Tree, Shrub 4
Salix sitchensis Coulter willow Tree, Shrub 14
Salvia mellifera Black sage Shrub 44
Sambucus mexicana Elderberry Tree, Shrub 40
Sambucus nigra Black elderberry Shrub 13
Sambucus nigra ssp. caerulea Blue elderberry Shrub 60
Senecio flaccidus Shrubby ragwort Shrub 6
Senecio flaccidus var. douglasii Bush groundsel Shrub 3
Solanum parishii Parish's purple nightshade Shrub 3
Solanum umbelliferum Blue witch Shrub 10
Styrax redivivus California snowdrop bush Shrub 10
Symphoricarpos acutus Creeping snowberry Shrub 17
Symphoricarpos hesperius Creeping snowberry Shrub 17
Symphoricarpos mollis Snowberry Shrub 18
Toxicodendron diversilobum Poison oak Vine, Shrub 7
Trichostema parishii Parish's bluecurls Shrub 1
Viburnum ellipticum Common viburnum Shrub 5
Vitis californica California wild grape Vine, Shrub 39
  Lifeform: Tree43 plants
Abies Xshastensis Shasta red fir Tree  
Abies concolor White fir Tree 22
Abies magnifica Magnificant silver fir Tree 3
Abies magnifica var. shastensis Shasta red fir Tree  
Acer macrophyllum Bigleaf maple Tree 52
Acer negundo Boxelder Tree 30
Acer negundo var. californicum California box elder Tree 30
Aesculus californica Buckeye Tree 46
Alnus rhombifolia White alder Tree 38
Calocedrus decurrens Incense cedar Tree 40
Fraxinus latifolia Oregon ash Tree 29
Juglans californica var. hindsii Northern california black walnut Tree 13
Juglans hindsii Northern california black walnut Tree 13
Pinus attenuata Knobcone pine Tree 6
Pinus jeffreyi Jeffrey pine Tree 17
Pinus lambertiana Sugar pine Tree 13
Pinus ponderosa Yellow pine Tree 29
Pinus ponderosa var. ponderosa North plateau ponderosa pine Tree 2
Pinus sabiniana Gray pine Tree 28
Platanus racemosa California sycamore Tree 36
Populus balsamifera ssp. trichocarpa Black cottonwood Tree 27
Populus fremontii Fremont cottonwood Tree 32
Populus fremontii ssp. fremontii Cottonwood Tree 4
Populus trichocarpa Black cottonwood Tree 27
Pseudotsuga menziesii Douglas fir Tree 31
Pseudotsuga menziesii var. menziesii Douglas fir Tree 4
Quercus Xmorehus Oracle oak Tree 1
Quercus berberidifolia Inland scrub oak Tree 13
Quercus chrysolepis Gold cup live oak Tree 24
Quercus chrysolepis var. nana Canyon live oak Tree 25
Quercus douglasii Blue oak Tree 26
Quercus garryana Oregon oak Tree 24
Quercus garryana var. breweri Oregon oak Tree 2
Quercus garryana var. garryana Oregon oak Tree 1
Quercus kelloggii California black oak Tree 24
Quercus lobata Valley oak Tree 40
Salix gooddingii Gooding's willow Tree 7
Salix laevigata Polished willow Tree 17
Salix lasiandra Pacific willow Tree 20
Salix lasiandra var. lasiandra Pacific willow Tree 6
Salix lucida ssp. lasiandra Shining willow Tree 6
Torreya californica California nutmeg Tree 9
Umbellularia californica California bay Tree 40
 
Pink background indicates a plant is non-native.
! indicates a plant is potentially invasive.
NB: found in Colusa 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.