A1-ranked (1-3 populations)

Scientific NameNotesRarity RanksCommon Name
Acmispon junceus var. junceusCNPS-EB: A1
Adiantum aleuticum(A. jordanii is more common)CNPS-EB: A1five-finger fern
Allium acuminatumCNPS-EB: A1Hooker's onion
Allium bolanderi var. bolanderiCNPS-EB: A1Bolander's onion
Allium crispumCNPS-EB: A1crinkled onion
Amaranthus powelliiCNPS-EB: A1Powell's amaranth
Ammannia coccineaCNPS-EB: A1long-leaved ammannia
Amsinckia grandifloraCNPS-EB: *A1
State CNPS: 1B.1
Global Rank: G1
CNDDB Rank: S1
FESA Status: FE
CESA Status: CE
large-flowered fiddleneck
Amsinckia tessellata var. gloriosaCNPS-EB: A1carrizo fiddleneck, tessellate fiddleneck
Amsinckia tessellata var. tessellataCNPS-EB: A1desert fiddleneck, devil's lettuce
Amsinckia vernicosaCNPS-EB: A1waxy fiddleneck, forked fiddleneck
Antirrhinum kelloggiiCNPS-EB: A1lax snapdragon
Antirrhinum thompsonii(formerly A. multiflorum)CNPS-EB: A1withered snapdragon
Aphyllon californicum subsp. jepsoniiCNPS-EB: A1Jepson broom-rape
Aphyllon pinorumCNPS-EB: A1pine broom-rape
Arctostaphylos crustacea subsp. roseiCNPS-EB: A1Rose's manzanita
Argemone munitaCNPS-EB: A1chicalote, prickly poppy
Asclepias cordifolia(A. californica is more commonCNPS-EB: A1purple milkweed
Astragalus didymocarpus var. didymocarpus(A. gambelianus is more commonCNPS-EB: A1two-seeded milkvetch
Athysanus unilateralis(formerly Heterodraba unilateralis)CNPS-EB: A1heterodraba
Atriplex serenana var. serenanaCNPS-EB: A1bractscale
Balsamorhiza macrolepisCNPS-EB: *A1
State CNPS: 1B.2
Global Rank: G2
CNDDB Rank: S2
big-scale balsamroot
Berberis aquifolium var. dictyotaCNPS-EB: A1Jepson's mahonia
Berberis nervosa(B. pinnata is more common)CNPS-EB: A1Oregon grape
Bromus sitchensis var. maritimus(formerly B. maritimus)CNPS-EB: A1maritime brome, seaside brome grass
Calochortus clavatus var. pallidusCNPS-EB: A1club-haired mariposa-lily
Camissonia strigulosaCNPS-EB: A1contorted primrose
Camissoniopsis cheiranthifolia subsp. cheiranthifoliaCNPS-EB: A1dune suncup
Campanula griffiniiCNPS-EB: A1Griffin's campanula
Carex aquatilis var. divesCNPS-EB: A1Sitka sedge
Carex graciliorCNPS-EB: A1slender sedge
Carex laeviculmisCNPS-EB: A1smooth-stemmed sedge
Carex lenticularis var. lipocarpaCNPS-EB: A1few-ribbed sedge
Carex leporina(formerly Carex ovalis)CNPS-EB: A1hare sedge, oval sedge, mountain hare sedge
Carex multicostataCNPS-EB: A1many-ribbed sedge
Carex pellita(formerly C. lanuginosa)CNPS-EB: A1woolly sedge
Carex sentaCNPS-EB: A1western rough sedge, rough sedge
Carex unilateralisCNPS-EB: A1one-sided sedge
Castilleja exserta subsp. latifoliaCNPS-EB: A1owl's-clover
Castilleja subinclusa subsp. franciscanaCNPS-EB: A1Franciscan indian paintbrush
Castilleja subinclusa subsp. subinclusaCNPS-EB: A1long-leaved indian paintbrush
Chaenactis glabriuscula var. glabriusculaCNPS-EB: A1yellow pincushion
Chaenactis glabriuscula var. heterocarphaCNPS-EB: A1inner coast range pincushion, yellow pincushion
Chaenactis glabriuscula var. megacephalaCNPS-EB: A1yellow pincushion
Chenopodium berlandieri var. sinuatumCNPS-EB: A1
Chenopodium pratericolaCNPS-EB: A1
Chenopodium rubrumCNPS-EB: A1red pigweed, red goosefoot
Chlorogalum pomeridianum var. minusCNPS-EB: *A1
State CNPS: 1B.2
Global Rank: G5T3
CNDDB Rank: S3
DWARF SOAPROOT
Chloropyron molle subsp. hispidumCNPS-EB: *A1
State CNPS: 1B.1
Global Rank: G2T1
CNDDB Rank: S1
hispid salty bird's-beak, hispid bird's-beak
Chloropyron palmatumCNPS-EB: *A1
State CNPS: 1B.1
Global Rank: G1
CNDDB Rank: S1
FESA Status: FE
CESA Status: CE
palmate salty bird's-beak, palmate-bracted bird's-beak
Chorizanthe polygonoides var. polygonoidesCNPS-EB: A1knotweed spineflower
Cicuta maculata var. bolanderiCNPS-EB: *A1
State CNPS: 2B.1
Global Rank: G5T4T5
CNDDB Rank: S2?
Bolander's water-hemlock, water hemlock
Cirsium andrewsiiCNPS-EB: *A1
State CNPS: 1B.2
Global Rank: G3
CNDDB Rank: S3
Franciscan thistle
Cirsium douglasii var. douglasiiCNPS-EB: A1swamp thistle
Cirsium fontinale var. campylonCNPS-EB: *A1
State CNPS: 1B.2
Global Rank: G2T2
CNDDB Rank: S2
Mount Hamilton fountain thistle
Cirsium remotifolium var. odontolepisCNPS-EB: A1remote-leaved thistle
Clarkia breweriCNPS-EB: *A1
State CNPS: 4.2
Global Rank: G4
CNDDB Rank: S4
Brewer's clarkia
Clarkia epilobioidesCNPS-EB: A1
Clarkia franciscanaCNPS-EB: *A1
State CNPS: 1B.1
Global Rank: G1
CNDDB Rank: S1
FESA Status: FE
CESA Status: CE
Presidio clarkia
Clarkia purpurea subsp. viminea(ssp. quadrivulnera more commonCNPS-EB: A1large godetia
Clarkia rhomboideaCNPS-EB: A1
Clarkia tembloriensis subsp. tembloriensisCNPS-EB: A1temblor clarkia
Clintonia andrewsianaCNPS-EB: A1red clintonia
Collomia diversifoliaCNPS-EB: *A1
State CNPS: 4.3
Global Rank: G4
CNDDB Rank: S4
serpentine collomia
Collomia heterophyllaCNPS-EB: A1variable-leaf collomia
Cordylanthus nidulariusCNPS-EB: *A1
State CNPS: 1B.1
Global Rank: G1
CNDDB Rank: S1
CESA Status: CR
Mount Diablo bird's-beak
Cordylanthus rigidus subsp. rigidusCNPS-EB: A1stiffly-branched bird's-beak
Cornus glabrataCNPS-EB: A1brown dogwood
Crocidium multicauleCNPS-EB: A1spring gold
Cryptantha juniperensis(formerly C. nevadensis var. rigida)CNPS-EB: A1Nevada cryptantha
Cucurbita foetidissimaCNPS-EB: A1buffalo gourd, calabazilla, calabazilla
Cuscuta campestrisCNPS-EB: A1field dodder
Cuscuta salinaCNPS-EB: A1SALT DODDER
Cyperus strigosusCNPS-EB: A1false nutsedge, straw-colored cyperus
Deinandra bacigalupii(formerly Hemizonia increscensCNPS-EB: *A1
State CNPS: 1B.1
Global Rank: G1
CNDDB Rank: S1
CESA Status: CE
Livermore tarplant
Delphinium gypsophilumCNPS-EB: A1gypsum-loving larkspur
Dichondra donellianaCNPS-EB: A1dichondra
Diplacus bolanderi(formerly Mimulus b.)CNPS-EB: A1Bolander's monkeyflower
Downingia cuspidataCNPS-EB: A1cuspidate downingia
Downingia insignisCNPS-EB: A1cupped downingia
Draba cuneifoliaCNPS-EB: A1Sonora draba
Dudleya cymosa subsp. cymosa(ssp. paniculata is more common)CNPS-EB: A1spreading dudleya
Eclipta prostrataCNPS-EB: A1false daisy
Elatine brachyspermaCNPS-EB: A1waterwort
Eleocharis parishiiCNPS-EB: A1Dombey's spike-rush
Eleocharis parvulaCNPS-EB: *A1
State CNPS: 4.3
Global Rank: G5
CNDDB Rank: S3
small spikerush
Elymus trachycaulus subsp. trachycaulusCNPS-EB: A1slender wheat grass
Epilobium ciliatum subsp. watsonii(ssp. ciliatum is more common)CNPS-EB: A1San Francisco willowherb
Epilobium cleistogamumCNPS-EB: A1cleistogamous boisduvalia
Epilobium torreyiCNPS-EB: A1narrow-leaved boisduvalia
Epipactis giganteaCNPS-EB: A1stream orchid
Eremalche exilisCNPS-EB: A1WHITE MALLOW
Eremalche parryi subsp. parryi CNPS-EB: A1Parry's mallow
Eremothera boothii subsp. decorticans(formerly Camissonia boothii subsp. decorticans)CNPS-EB: A1shredding evening-primrose
Eriastrum ertteraeCNPS-EB: *A1
State CNPS: 1B.1
Global Rank: G1
CNDDB Rank: S1
CESA Status: CC
Ertter's eriastrum
Eriastrum pluriflorum subsp. pluriflorumCNPS-EB: A1many-flowered eriastrum
Erigeron reductus var. angustatusCNPS-EB: A1California rayless daisy
Eriogonum fasciculatum var. foliolosumCNPS-EB: A1leafy California buckwheat, California buckwheat
Eriogonum inerme var. inermeCNPS-EB: A1unarmed buckwheat
Eriogonum nudum var. pauciflorumCNPS-EB: A1little-flower wild buckwheat
Eriogonum nudum var. psychicolaCNPS-EB: *A1
State CNPS: 1B.1
Global Rank: G5T1
CNDDB Rank: S1
Antioch Dunes buckwheat
Eriogonum truncatumCNPS-EB: *A1
State CNPS: 1B.1
Global Rank: G1
CNDDB Rank: S1
Mount Diablo buckwheat
Eryngium aristulatum var. hooveriCNPS-EB: *A1
State CNPS: 1B.1
Global Rank: G5T1
CNDDB Rank: S1
Hoover's button-celery
Eryngium armatumCNPS-EB: A1coastal button-celery, coast coyote-thistle
Eryngium articulatumCNPS-EB: A1beethistle, coyote-thistle
Eryngium spinosepalumCNPS-EB: *A1
State CNPS: 1B.2
Global Rank: G2
CNDDB Rank: S2
Eryngium vaseyi var. vallicolaCNPS-EB: A1coyote-thistle, Vasey's coyote-thistle
Erysimum capitatum var. angustatum(ssp. capitatum is more commonCNPS-EB: *A1
State CNPS: 1B.1
Global Rank: G5T1
CNDDB Rank: S1
FESA Status: FE
CESA Status: CE
Contra Costa wallflower
Erythranthe inconspicuaCNPS-EB: *A1
State CNPS: 4.3
Global Rank: G4
CNDDB Rank: S4
Erythranthe latidens(formerly Mimulus latidens)CNPS-EB: A1broad-toothed monkeyflower
Eschscholzia caespitosaCNPS-EB: A1tufted poppy
Eschscholzia rhombipetalaCNPS-EB: *A1
State CNPS: 1B.1
Global Rank: G1
CNDDB Rank: S1
diamond-petaled California poppy
Euonymus occidentalis var. occidentalisCNPS-EB: A1burning bush
Festuca elmeriCNPS-EB: A1Elmer's fescue
Fremontodendron californicumCNPS-EB: A1flannelbush
Fritillaria falcataCNPS-EB: *A1
State CNPS: 1B.2
Global Rank: G2
CNDDB Rank: S2
talus fritillary
Galium porrigens var. tenue(var. porrigens is more commonCNPS-EB: A1climbing bedstraw
Galium trifidum subsp. columbianumCNPS-EB: A1trifid bedstraw
Gaultheria shallonCNPS-EB: A1salal
Gilia capitata subsp. capitataCNPS-EB: A1blue field gilia
Glyceria leptostachyaCNPS-EB: A1narrow manna grass, Davy's mannagrass
Gratiola ebracteataCNPS-EB: A1bractless hedge-hyssop
Hesperocyparis sargentii(formerly Cupressus s.)CNPS-EB: A1Sargent cypress
Hesperolinon clevelandiiCNPS-EB: A1Cleveland's dwarf flax
Hesperolinon disjunctumCNPS-EB: A1dwarf flax
Heterocodon rariflorumCNPS-EB: A1heterocodon
Heterotheca oregona var. rudisCNPS-EB: A1Oregon goldenaster
Heterotheca oregona var. scaberrimaCNPS-EB: A1Oregon goldenaster
Holocarpha macradeniaCNPS-EB: *A1
State CNPS: 1B.1
Global Rank: G1
CNDDB Rank: S1
FESA Status: FT
CESA Status: CE
Santa Cruz tarplant
Horkelia californica var. californicaCNPS-EB: A1California horkelia
Hosackia stipularis var. stipularisCNPS-EB: A1stipulate lotus
Hydrophyllum occidentaleCNPS-EB: A1western waterleaf
Idahoa scapigeraCNPS-EB: A1flat-pod
Iris longipetalaCNPS-EB: *A1
State CNPS: 4.2
Global Rank: G3
CNDDB Rank: S3
coast iris
Isoetes howelliiCNPS-EB: A1Howell's quillwort
Isolepis carinata(formerly Scirpus koilolepis)CNPS-EB: A1dwarf club-rush
Juncus lescuriiCNPS-EB: A1San Francisco rush, salt rush
Juncus oxymerisCNPS-EB: A1pointed rush
Kopsiopsis strobilacea(formerly Boschniakia strobilacea)CNPS-EB: A1California ground-cone
Laennecia coulteri(formerly Conyza c.)CNPS-EB: A1Coulter's horseweed, Coulter's conyza
Lasthenia ferrisiaeCNPS-EB: *A1
State CNPS: 4.2
Global Rank: G3
CNDDB Rank: S3
Ferris' goldfields
Lasthenia fremontiiCNPS-EB: A1Fremont's goldfields
Lasthenia minorCNPS-EB: A1coastal goldfields, woolly goldfields
Lasthenia platycarphaCNPS-EB: A1alkali goldfields
Leersia oryzoidesCNPS-EB: A1rice cutgrass
Legenere limosaCNPS-EB: *A1
State CNPS: 1B.1
Global Rank: G2
CNDDB Rank: S2
legenere
Leptochloa fusca subsp. fascicularisCNPS-EB: A1bearded sprangletop
Leptochloa fusca subsp. uninerviaCNPS-EB: A1mexican sprangletop, dense-flowered sprangle-top
Leptosiphon bolanderi(formerly Linanthus b.)CNPS-EB: A1Bolander's linanthus, Bolander's leptosiphon
Leptosiphon liniflorus(formerly Linanthus l.)CNPS-EB: A1flax-flowered linanthus, flax-flowered leptosiphon
Leptosyne calliopsidea(formerly Coreopsis c.)CNPS-EB: A1leafy-stemmed coreopsis
Leptosyne hamiltonii(formerly Coreopsis h.)CNPS-EB: *A1
State CNPS: 1B.2
Global Rank: G2
CNDDB Rank: S2
Mount Hamilton coreopsis
Lessingia ramulosaCNPS-EB: A1
Lilium pardalinum subsp. pardalinumCNPS-EB: A1leopard lily
Limnanthes douglasii subsp. douglasiiCNPS-EB: A1meadowfoam
Linanthus dichotomus subsp. meridianusCNPS-EB: A1
Lithophragma bolanderiCNPS-EB: A1Bolander starflower
Lupinus affinisCNPS-EB: A1lupine
Lupinus concinnusCNPS-EB: A1Bajada lupine
Lycopus asperCNPS-EB: A1bugleweed
Lysimachia maritimaCNPS-EB: A1sea-milkwort
Lysimachia minima(formerly Anagallis minima, Centunculus minimus)CNPS-EB: A1chaffweed
Malacothrix coulteriCNPS-EB: A1snake's-head
Melica bulbosaCNPS-EB: A1onion grass
Melica subulataCNPS-EB: A1
Microseris acuminataCNPS-EB: A1Sierra Foothills microseris
Microseris campestrisCNPS-EB: A1San Joaquin microseris
Microseris elegansCNPS-EB: A1elegant microseris
Mirabilis laevis var. crassifolia(formerly M. californica)CNPS-EB: A1wishbone bush, California four o'clock
Monolepis nuttallianaCNPS-EB: A1Nuttall's poverty weed, poverty weed
Monolopia lanceolataCNPS-EB: A1common hillside daisy, common monolopia
Myosurus minimus subsp. apusCNPS-EB: *A1
State CNPS: 3.1
Global Rank: G5T2Q
CNDDB Rank: S2
little mousetail
Myosurus sessilisCNPS-EB: A1sessile mouse-tail
Myriopteris gracillimaCNPS-EB: A1lace fern
Navarretia hamata subsp. parvilobaCNPS-EB: A1hooked navarretia
Navarretia heterandraCNPS-EB: *A1
State CNPS: 4.3
Global Rank: G4
CNDDB Rank: S4
Tehama navarretia
Navarretia nigelliformis subsp. radiansCNPS-EB: *A1
State CNPS: 1B.2
Global Rank: G4T2
CNDDB Rank: S2
shining navarretia
Navarretia prostrataCNPS-EB: *A1
State CNPS: 1B.2
Global Rank: G2
CNDDB Rank: S2
prostrate vernal pool navarretia
Nicotiana attenuataCNPS-EB: A1coyote tobacco
Nitrophila occidentalisCNPS-EB: A1nitrophila
Oxalis oreganaCNPS-EB: A1redwood sorrel
Parietaria hespera var. californicaCNPS-EB: A1California pellitory
Pentachaeta exilis subsp. exilisCNPS-EB: A1meager pentachaeta
Petasites frigidus var. palmatusCNPS-EB: A1western sweet coltsfoot, coltsfoot
Petunia parvifloraCNPS-EB: A1wild petunia
Phacelia douglasiiCNPS-EB: A1Douglas' phacelia
Phacelia suaveolensCNPS-EB: A1sweet-scented phacelia
Phalaris arundinaceaCNPS-EB: A1reed canary grass
Pilularia americanaCNPS-EB: A1pillwort
Pinus attenuataCNPS-EB: A1knobcone pine
Piperia unalascensisCNPS-EB: A1Alaska piperia, slender-spire orchid
Plagiobothrys glaberCNPS-EB: *A1
State CNPS: 1A
Global Rank: GX
CNDDB Rank: SX
hairless popcornflower
Plagiobothrys leptocladusCNPS-EB: A1alkali plagiobothrys
Polypodium scouleriCNPS-EB: A1leather-leaf fern
Polystichum californicumCNPS-EB: A1California sword fern
Pseudognaphalium biolettii(formerly Gnaphalium bicolor)CNPS-EB: A1Bioletti's cudweed
Pseudognaphalium microcephalum(formerly Gnaphalium canescensCNPS-EB: A1white everlasting
Psilocarphus chilensis(formerly P. tenellus var. gloCNPS-EB: A1round woolly marbles, round woolly-marbles
Puccinellia nuttallianaCNPS-EB: A1Nuttall's alkali grass
Pyrrocoma racemosa var. racemosaCNPS-EB: A1racemose pyrrocoma
Quercus agrifolia x wislizeniCNPS-EB: A1coast live oak x interior live oak
Quercus garryana x durataCNPS-EB: A1Oregon oak x leather oak
Quercus parvula var. shreveiCNPS-EB: A1island scrub oak
Quercus xeplingiiCNPS-EB: A1Oregon oak x blue oak
Rhinotropis californica(formerly Polygala californica)CNPS-EB: A1California milkwort
Ribes speciosumCNPS-EB: A1fuchsia-flowered gooseberry
Romanzoffia californicaCNPS-EB: A1Suksdorf's romanzoffia
Rumex crassus(formerly R. salicifolius var.CNPS-EB: A1willow dock
Sabulina californica(formerly Minuartia californica)CNPS-EB: A1California sandwort
Sabulina pusilla(formerly Minuartia pusilla)CNPS-EB: A1annual sandwort, least sandwort
Sagittaria latifoliaCNPS-EB: A1arrowhead
Salvia spathaceaCNPS-EB: A1California hummingbird sage, hummingbird sage
Samolus parviflorusCNPS-EB: A1seaside brookweed, water-pimpernel
Scutellaria siphocampyloidesCNPS-EB: A1gray-leaved skullcap
Sedella pentandra(formorely Parvisedum pentandrCNPS-EB: A1Mount Hamilton sedella
Senecio hydrophilusCNPS-EB: A1water ragwort, alkali-marsh ragwort, alkali-marsh butterweed
Sidalcea diploscyphaCNPS-EB: A1fringed checkerbloom, fringed sidalcea
Silene antirrhinaCNPS-EB: A1sleepy catchfly, snapdragon catchfly
Silene lemmoniiCNPS-EB: A1LEMMON'S CATCHFLY
Silene verecundaCNPS-EB: A1San Francisco campion, Cuyamaca campion
Sisyrinchium californicumCNPS-EB: A1golden-eyed-grass
Sium suaveCNPS-EB: A1hemlock water-parsnip
Sparganium eurycarpum var. eurycarpumCNPS-EB: A1bur-reed
Sparganium eurycarpum var. greeneiCNPS-EB: A1Greene's bur-reed
Spiranthes romanzoffianaCNPS-EB: A1hooded ladies' tresses
Sporobolus airoidesCNPS-EB: A1alkali sacaton
Streptanthus breweriCNPS-EB: A1Brewer's streptanthus
Taxus brevifoliaCNPS-EB: A1PACIFIC YEW
Thysanocarpus radiansCNPS-EB: A1ribbed fringe pod
Toxicoscordion venenosum var. venenosum(formerly Zigadenus venenosus)CNPS-EB: A1death-camas
Trifolium cyathiferumCNPS-EB: A1BOWL CLOVER
Trifolium flavulum(Included within T. fucatum inCNPS-EB: A1bull clover
Trifolium gambelii(Included within T. fucatum inCNPS-EB: A1bull clover
Trifolium grayiCNPS-EB: A1Gray's clover
Trifolium lilacinum(Included within T. barbigerumCNPS-EB: A1Gray's clover
Trifolium macraeiCNPS-EB: A1Macrae's clover, double-headed clover
Trifolium wormskioldiiCNPS-EB: A1cow clover
Triglochin concinna var. concinna(T. maritima is more common)CNPS-EB: A1seaside arrow-grass, slender arrow-grass
Tropidocarpum capparideumCNPS-EB: *A1
State CNPS: 1B.1
Global Rank: G1
CNDDB Rank: S1
caper-fruited tropidocarpum
Verbena hastataCNPS-EB: A1blue vervain
Viola adunca subsp. aduncaCNPS-EB: A1western blue violet
Viola purpurea subsp. purpureaCNPS-EB: A1mountain violet
Wolffia brasiliensisCNPS-EB: *A1
State CNPS: 2B.3
Global Rank: G5
CNDDB Rank: S2
BRAZILIAN WATERMEAL