Scientific Name Common Name Origin, if non-native Habitat Blooming in
FERNS AND THEIR ALLIES
BLECHNACEAE Chain Fern family
Woodwardia fimbriata Giant chain fern Wet places
DRYOPTERIDACEAE Wood Fern Family
Dryopteris arguta Wood Fern Open, wooded slopes
EQUISETACEAE Horsetail Family
Equisetum arvense Common horsetail Moist disturbed sites
Equisetum hyemale ssp. affine Scouring rush Streams; moist, sandy or gravelly areas
POLYPODIACEAE Polypody Family
Polypodium californicum Shaded canyons, streambanks
PTERIDACEAE Maidenhair Fern Family
Adiantum jordanii Maidenhair fern Shaded hillsides, moist woods
Pellaea andromedifolia Coffee fern Rocky or dry sites
Pellaea mucronata Bird's-food fern Rocky or dry sites
Pentagramma triangularis Goldenback fern Shaded slopes or rocky sites
CONIFERS
PINACEAE Pine Family
Pinus sabiniana Gray pine Foothill woodland, chaparral April-May
FLOWERING PLANTS
DICOTYLEDONS
ACERACEAE Maple Family
Acer macrophyllum Bigleaf maple Along streambanks and canyon floors April-May
ANACARDIACEAE Sumac Family
Rhus trilobata Squaw-bush Common in canyons and creek beds, dry slopes and thickets March-April
Toxicodendron diversilobum Poison oak Very abundant in low places, thickets, chaparral and woodland April-May
APIACEAE Celery Family
Angelica californica Angelica Dry slopes June
Anthriscus caucalis Bur-chervil Native to Europe Disturbed areas, shady places April-June
Apiastrum angustifolium Wild celery Chaparral March-April
Conium maculatum Poison hemlock Moist, especially disturbed, places April-June
Coriandrum sativum Coriander, cilantro, Chinese parsley Native to southern Europe Disturbed areas May-July
Daucus pusillus Rattlesnake weed Rocky or sandy places April-June
Foeniculum vulgare Fennel Roadside June-October
Ligusticum apiifolium Celery-leaved lovage Meadows, scrub or woods June-July
Lomatium californicum California rock parsnip Woodland, brushy slopes April-June
Lomatium dasycarpum Lace parsnip Rocky chaparral, woodland March-June
Lomatium macrocarpum Large lace parsnip Rocky chaparral, woodland April-June
Lomatium utriculatum Bladder parsnip Open grassy slopes, meadows, woodland February-May
Perideridia kelloggii Squaw root Open grassland July-August
Sanicula bipinnata Poison sanicle Open grassland, pine-oak woodland April-May
Sanicula bipinnatifida Purple sanicle Open grassland, pine-oak woodland March-May
Sanicula crassicaulis Gamble weed Open slopes, woodlands March-May
Torilis arvensis Native to Europe Disturbed places May-June
Torilis nodosa Hedge parsley Native to Europe Disturbed places April-June
Yabea microcarpa Grassy slopes, chaparral, woodland March-June
ARISTOLOCHIACEAE Pipevine Family
Aristolochia californica California pipe vine Streamsides, chaparral January-April
ASCLEPIADACEAE Milkweed Family
Asclepias cordifolia Purple milkweed Rocky slopes, chaparral May-July
Asclepias fascicularis Narrow-leaved milkweed Dry ground June-September
ASTERACEAE Aster or Sunflower Family
Achillea millefolium Yarrow Open, grassy areas March-June
Achyrachaena mollis Blowwives Grassy sites April-May
Agoseris grandiflora California dandelion Grasslands, shrubland, woodland May-July
Agoseris heterophylla Mountain dandelion Open, grassy slopes and flats March-May
Anthemis cotula Mayweed Disturbed sites May-July
Artemisia douglasiana Mugwort Open to shady places, often in drainages June-October
Aster radulinus Broad-leaved aster Dry woods July-October
Baccharis pilularis Coyote bush Common on hillsides and canyons August-December
Baccharis salicifolia Mule-fat Canyon bottoms, moist streamsides March-July
Brickellia californica California brickellia Diverse dry habitats August-October
Calycadenia ciliosa Rosin weed Open, dry meadows, hillsides June-September
Calycadenia pauciflora Small-flowered calycadenia Open, dry meadows, hillsides July-September
Carduus pycnocephalus Italian thistle Native to southern Europe Pastures, waste areas May-July
Centaurea melitensis Tocalote Native to Europe Disturbed fields, open woods April-June
Centaurea solstitialis Yellow star thistle Native to southern Europe Pastures, disturbed grassland or woodland May-October
Chaenactis glabriuscula var. heterocarpha Open slopes, ridges April-June
Chamomilla suaveolens Pineapple weed Native to NW Northern America, NE Asia Disturbed sites, footpaths, grazed land April-August
Conyza canadensis Horseweed Disturbed sites September-Oct
Cotula australis Brass buttons Native to Australia Disturbed sites January-May
Ericameria arborescens Golden fleece Woodland, chaparral August-November
Erigeron foliosus var. hartwegii Narrow-leaved daisy Grassy or brushy slopes May-July
Erigeron inornatus California rayless daisy Chaparral, rocky sites June-September
Eriophyllum lanatum var. achillaeoides Woolly sunflower Dry, often rocky sites May-July
Euthamia occidentalis Western goldenrod Streambanks September-November
Filago californica California filago Bare or grassy places, drainages March-June
Filago gallica Narrow-leaved filago Native to Europe Bare or grassy places April-June
Gnaphalium californicum Green cudweed Dry open or wooded hills January-July
Gnaphalium canescens ssp.beneolens Fragrant everlasting Open slopes, ridges July-November
Grindelia camporum var. camporum Great Valley grindelia Fields, roadsides August-September
Gutierrezia californica San Joaquin matchweed Grasslands, slopes, outcrops December
Helianthella californica California helianthella, perennial little sunflower Grasslands April-June
Helianthus californicus California sunflower Dry, rocky soils, streambanks June-Aug
Hemizonia congesta ssp. luzulifolia Field tarweed Grasslands, fallow fields September-October
Hesperevax acaulis Sandy slopes, flats, sometimes burns
Hesperevax sparsiflora Sandy soils; dry, open areas March-May
Hieracium albiflorum White hawkweed Dry forests June-August
Hypochaeris glabra Smooth cat's-ear Native to Europe Disturbed sites May-June
Lactuca serriola Prickly lettuce Native to Europe Disturbed open areas September-October
Lagophylla ramosissima Common hareleaf Dry habitats May-October
Madia elegans ssp. vernalis Common madia Grassy sites, valleys, foothills March-June
Madia exigua Threadstem madia Grasslands, open woodlands May-July
Madia gracilis ssp. gracilis Slender tarweed Grasslands, woodlands April-August
Malacothrix floccifera Woolly malacothrix Open burns, chaparral May-June
Micropus californicus Slender cottonweed Dry or moist, bare or grassy sites March-June
Psilocarphus tenellus Slender woollyheads Dry slopes, generally on disturbed soil April-June
Rafinesquia californica California chicory Shrubby slopes, open woods, common after fires April-July
Rigiopappus leptocladus Grassy areas or among shrubs April-June
Senecio vulgaris Annual groundsel Native to Europe Disturbed sites Flowers in most months
Silybum marianum Milk thistle Native to southern Europe Roadsides, pastures, waste areas May-July
Soliva sessilis Common soliva Native to South America Disturbed sites March-June
Sonchus asper ssp. asper Sow-thistle Native to Europe Slightly moist waste places Flowers in most months
Sonchus tenerrimus Slender sowthistle Disturbed sites
Stephanomeria virgata Twiggy wreath plant Dry, open slopes July-November
Uropappus lindleyi Grassy areas, woods, chaparral April-June
Wyethia helenioides Foothill mule-ears Open grassland, shrubland March-April
BORAGINACEAE Borage Family
Amsinckia menziesii var. intermedia Fiddleneck Open, generally disturbed sites March-June
Cryptantha flaccida Flaccid cryptantha Open, dry sites April
Cynoglossum grande Large-leaved hound's tongue Shaded or open sites, woodland or chaparral March-June
Pectocarya pusilla Little pectocarya Dry sites in grassland, woodland April
Plagiobothrys canescens Valley popcorn flower Grassland, woodlands March-May
Plagiobothrys nothofulvus Popcorn flower Grassland, woodlands March-May
Plagiobothrys tenellus Small popcorn flower Dry slopes in grassland, scrub, woodland March-May
BRASSICACEAE Mustard Family
Arabis modesta Modest rock cress Steep slopes, cliffs April-May
Arabis modesta ssp. rollins Dry steep slopes, outcrops March-June
Athysanus pusillus Sandweed Grassy, open slopes, rocky outcrops March-June
Barbarea orthoceras Damp meadows, streambanks, moist woods May-September
Barbarea vulgaris Winter-cress Native to Eurasia Disturbed sites April-May
Brassica juncea Fields, disturbed sites April
Brassica nigra Black mustard Native to Europe Fields, disturbed sites April-June
Capsella bursa-pastoris Shepherd's-purse Native to Europe Disturbed sites Flowers all year
Cardamine californica var. integrifolia California toothwort, milkmaids Shaded sites, canyons, woods February-April
Cardamine oligosperma Annual bittercress Shady banks, creek bottoms March-July
Cardamine pennsylvanica Pennsylvania bittercress Shady banks, creek bottoms May-June
Cardaria draba Hoary-cress Native to Europe Disturbed sites March-June
Descurainia sophia Tansy-mustard Native to Eurasia Disturbed sites
Draba verna Whitlow-grass Native to Europe Open or disturbed sites February-May
Erysimum capitatum Wallflower Many habitats March-July
Guillenia lasiophylla California mustard Dry, open, sometimes disturbed sites March-June
Hirschfeldia incana Short pod mustard Native to Eurasia Creek bottoms, disturbed sites May-October
Lepidium strictum Peppergrass Native to South America Disturbed sites March-May
Sinapis arvensis Charlock Native to Eurasia Disturbed sites March-October
Sisymbrium altissimum Tumble-mustard Native to Europe Disturbed sites, fields May-July
Sisymbrium officinale Hedge-mustard Native to Europe Disturbed sites April-July
Thysanocarpus curvipes Lace pod Slopes, moist meadows March-May
Tropidocarpum gracile Keel-pod Grassy slopes and open areas March-May
CALYCANTHACEAE Calycanthus Family
Calycanthus occidentalis Spice bush Moist canyon floors and streams April-August
CAMPANULACEAE Bellflower Family
Githopsis specularioides Common blue cup Chaparral, oak woodlands April-June
Triodanis biflora Venus looking-glass Disturbed sites April-June
CAPRIFOLIACEAE Honeysuckle Family
Lonicera interrupta Chaparral honeysuckle Dry slopes, ridges May-July
Sambucus mexicana Blue elderberry Streambanks March-September
Symphoricarpos mollis Trailing snowberry Ridges, slopes April-June
CARYOPHYLLACEAE Pink Family
Cerastium glomeratum Mouse-ear chickweed Native to Europe Dry hillsides, grasslands, chaparral, disturbed sites February-May
Minuartia douglasii Douglas' sandwort Rocky slopes in chaparral April-June
Petrorhagia dubia Native to Europe Disturbed sites, woodland savanna May
Sagina apetala Dwarf pearlwort Sandy waste areas, streamsides May
Silene gallica Common catchfly Native to Europe Fields, disturbed sites February-June
Stellaria media Common chickweed Native to Europe Oak woodlands, meadows, disturbed sites March-June
Stellaria nitens Shining chickweed Streambanks, open woodlands, disturbed sites March-June
CHENOPODIACEAE Goosefoot Family
Chenopodium californicum Perennial goosefoot Open sites March-June
CISTACEAE Rock-rose Family
Helianthemum scoparium Peak rush-rose Rocky slopes and ridges March-June
CONVOLVULACEAE Morning-glory Family
Calystegia occidentalis Dry slopes, chaparral May-June
Calystegia purpurata ssp. purpurata Solano morning-glory, bindweed Chaparral May-July
CORNACEAE Dogwood Family
Cornus glabrata Brown dogwood Moist areas May-July
CRASSULACEAE Stonecrop Family
Crassula connata Sand pygmy Open areas February-May
Crassula tillaea (1) Mediterranean sand pygmy Native to Europe Open, gravelly sites March-April
Dudleya cymosa Canyon live-forever Rocky outcrops April-June
CUCURBITACEAE Gourd Family
Marah fabaceus var. agrestis Common manroot, wild cucumber Streamsides, shrubby and open areas February-April
Marah watsonii Watson's manroot, bigroot Shrubby sites
CUSCUTACEAE Dodder Family March-April
Cuscuta californica  (2) California dodder Chaparral, grassland May-August
DATISCACEAE Datisca Family
Datisca glomerata Durango root Dry stream beds May-July
ERICACEAE Heath Family
Arbutus menziesii Pacific madrone Oak, pine woodlands March-May
Arctostaphylos glandulosa ssp. glandulosa Eastwood manzanita Slopes, ridges, chaparral January-April
Arctostaphylos manzanita Parry manzanita Slopes, chaparral, woodland February-April
EUPHORBIACEAE Spurge Family
Eremocarpus setigerus Doveweed, turkey mullein Common in dry, open areas May-October
Euphorbia crenulata Chinese caps, spurge Common in dry areas March-August
Euphorbia spathulata Spurge Occasional in open and disturbed areas March-June
FABACEAE Pea Family
Astragalus gambelianus Gambel's dwarf locoweed Open, grassy sites, shrubland March-June
Cercis occidentalis Western redbud Dry slopes, canyons, streamsides, chaparral February-April
Hoita macrostachya Leather root Streamsides, spring-moist sites July-August
Lathyrus vestitus var. vestitus Pacific peavine Chaparral, oak woodland April-June
Lotus crassifolius Buck lotus Chaparral, pine woodland, disturbed sites May-August
Lotus humistratus Hill lotus Grassland, oak, pine woodland March-June
Lotus micranthus Pink-flowered lotus Open flats, fields and slopes March-May
Lotus purshianus Spanish lotus Chaparral, disturbed sites June
Lotus scoparius California broom, deerweed Chaparral, roadsides March-August
Lotus wrangelianus Smooth hill lotus Chaparral, disturbed sites March-September
Lupinus albifrons Bush lupine Open sand or rocks March-June
Lupinus bicolor Miniature lupine Open or disturbed sites March-June
Lupinus microcarpus var. densiflorus White-whorled lupine Open, or disturbed sites April-June
Lupinus succulentus Fleshy lupine Open or disturbed sites February-May
Medicago polymorpha Bur clover Native to Europe Disturbed sites March-June
Melilotus alba White sweet clover Native to Eurasia Open, disturbed sites May-September
Melilotus indica Yellow sweet clover Native to Eurasia Open, disturbed sites April-October
Pickeringia montana Chaparral pea Chaparral, open woodlands April-May
Rupertia physodes California tea Woodlands May-July
Trifolium albopurpureum Rancheria clover Grasslands, chaparral, pine woodlands March-April
Trifolium ciliolatum Tree clover Grasslands, chaparral, disturbed sites
Trifolium gracilentum Slender clover Open, disturbed sites April
Trifolium hirtum Rose clover Native to Eurasia Disturbed sites March-May
Trifolium microcephalum Small-headed clover Streambanks, moist, disturbed sites March
Trifolium oliganthum Few-flowered clover Woody or shrubby slopes April
Trifolium willdenovii Tomcat clover Disturbed, spring-moist soils March-May
Vicia sativa Common vetch Native to Europe Disturbed sites April-May
FAGACEAE Oak Family
Quercus berberidifolia Scrub oak Dry slopes, chaparral April
Quercus douglasi Blue oak Interior foothills, woodland March-April
Quercus lobata Valley oak
Quercus wislizeni Interior live oak Interior canyons, chaparral, oak/pine woodland March-April
GARRYACEAE Silk Tassel Family
Garrya fremontii Silk tassel Chaparral, foothill woodland February-March
GERANIACEAE Geranium Family
Erodium botrys Long-beaked filaree Native to Europe Dry, open or disturbed sites March-May
Erodium brachycarpum Native to southern Europe Dry, open or disturbed sites February-May
Erodium cicutarium (3) Red-stemmed filaree Native to southern Europe Open, disturbed sites, grassland, shrubland February-May
Erodium moschatum White-stemmed filaree Native to southern Europe Common in disturbed sites February-May
Geranium molle Annual cranesbill Native to Europe Open to shaded disturbed sites May-July
GROSSULARIACEAE Gooseberry Family
Ribes malvaceum Chaparral currant Chaparral, oak woodland October-March
Ribes victoris Victor's gooseberry Chaparral
HIPPOCASTANACEAE Buckeye Family
Aesculus californica California buckeye Along drainages, sides of streams May-June
HYDROPHYLLACEAE Waterleaf Family
Emmenanthe penduliflora Whispering bells Dry, open slopes, often after burns May-June
Eriodictyon californicum Yerba santa Fields, woodland, chaparral May-July
Eucrypta chrysanthemifolia Common eucrypta Chaparral, disturbed sites March-June
Nemophila heterophylla Vari-leaf nemophila Partly shaded slopes, chaparral, streambanks March-July
Nemophila pedunculata Meadow nemophila Grasslands, woodlands, streambanks April-August
Phacelia cicutaria Caterpillar phacelia Slopes, grassland, chaparral, oak/pine woodland March-May
Phacelia imbricata Imbricate phacelia Slopes, chaparral, woodland March-June
Phacelia tanacetifolia  (1) Tansy phacelia Slopes, open areas March-May
HYPERICACEAE St. John's Wort Family
Hypericum perforatum Klamathweed Native to Europe Pastures, disturbed sites June-July
Hypericum concinnum Gold-wire dry, shrubby slopes May-July
JUGLANDACEAE Walnut Family
Juglans californica var. hindsii Black walnut Shaded slopes, drainages April-May
LAMIACEAE Mint Family
Lamium amplexicaule Henbit Native to Europe Disturbed sites, former fields or homesteads March-August
Lepechinia calycina Pitcher sage Open slopes, chaparral, woodland April-June
Marrubium vulgare Horehound Native to Europe Disturbed sites March-August
Mentha spicata Spearmint Native to Europe Moist sites July-October
Monardella villosa Coyote mint Rocky slopes, chaparral, oak woodland June-August
Salvia columbariae Chia Dry, disturbed sites, chaparral March-June
Scutellaria tuberosa Tuberous skullcap Chaparral, oak woodland, common after fires March-July
Stachys ajugoides var. rigida Hedge nettle Generally moist sites, sometimes dry hillsides July-August
LAURACEAE Laurel Family
Umbellularia californica California bay or laurel Shaded slopes, drainages, chaparral December-May
MALVACEAE Mallow Family
Malva nicaeensis Bull mallow Native to Eurasia Disturbed sites March-September
Malva parviflora Cheeseweed Native to Eurasia Disturbed sites Flowers most of the year
Sidalcea diploscypha Fringed sidalcea Grassland, open woodland April-June
OLEACEAE Olive Family
Fraxinus dipetala Flowering ash Slopes, chaparral, oak/pine woodland April-May
ONAGRACEAE Evening Primrose Family
Clarkia affinis Openings in chaparral April-May
Clarkia concinna Red ribbons Woodland May-July
Clarkia purpurea ssp. quadrivulnera Four-spot Open, grassy or shrubby sites April-July
Clarkia unguiculata Elegant clarkia Dry, often shaded slopes May-June
Epilobium brachycarpum Annual willow-herb Open, dry grassland, woodland, disturbed sites June-September
Epilobium canum ssp. canum California fuchsia, hummingbird trumpet Dry, rocky sites August-November
Epilobium minutum Chaparral willow-herb Open, dry disturbed sites April-August
OROBANCHACEAE Broomrape Family
Orobanche bulbosa  (4) Chaparral broomrape Openings in chaparral April-July
Orobanche californica California broomrape Generally dry, rocky areas May-June
Orobanche fasciculata  (5) Clustered broomrape Dry, generally bare sites April-July
Orobanche uniflora (6) Naked broomrape Generally moist sites March-May
PAPAVERACEAE Poppy Family
Eschscholzia caespitosa Annual California poppy Open chaparral March-June
Eschscholzia californica California golden poppy Grassy, open areas February-September
PHILADELPHACEAE Mock Orange Family
Whipplea modesta Yerba de selva Shaded slopes April-June
PLANTAGINACEAE Plantain Family
Plantago erecta Annual plantain Grassy slopes and flats, open woodland April
POLEMONIACEAE Phlox Family
Allophyllum divaricatum Pink false gilia Chaparral, woodland, particularly following a fire April-June
Allophyllum gilioides Blue false gilia Open, damp or grassy sites April-June
Collomia heterophylla Vari-leaf collomia Open sites April-June
Gilia capitata Blue-headed gilia Open, dry slopes May-July
Gilia clivorum Many-stemmed gilia Open, grassy sites March-April
Gilia tricolor Bird's eyes Open grasslands, slopes March-April
Linanthus androsaceus False baby stars Open or shaded areas, chaparral, woodland April-June
Linanthus bicolor True baby stars Open grassland and woodland March-June
Linanthus ciliatus Whisker brush Dry open or wooded sites March-July
Navarretia mellita Honey-scented navarretia Open sandy or gravelly sites, chaparral July
Navarretia pubescens Downy navarretia Open slopes May-July
Navarretia viscidula Sticky navarretia Open flats near water May-July
Phlox gracilis Slender phlox Dry to moist sites March-August
POLYGONACEAE Buckwheat Family
Chorizanthe membranacea Pink spineflower Grassland, chaparral, foothill woodland April-July
Eriogonum dasyanthemum Many-flowered buckwheat Sand June-October
Eriogonum nudum Naked buckwheat Dry rocky areas June-November
Pterostegia drymarioides Shady, moist sites March-July
Rumex acetosella Sheep sorrel Native to Eurasia Moist, disturbed sites March-August
Rumex crispus Curly dock Native to Eurasia Disturbed sites Flowers most of the year
PORTULACACEAE Purslane Family
Calandrinia breweri Brewer's calandrinia Disturbed sites, burns March-June
Calandrinia ciliata Red maids Open, grassy sites February-May
Claytonia parviflora ssp. parviflora Moist, often disturbed sites March
Claytonia perfoliata Miner's lettuce Common in grassy or disturbed sites February-May
PRIMULACEAE Primrose Family
Anagallis arvensis Scarlet pimpernel Native to Europe Common in disturbed areas March-July
Dodecatheon hendersonii Henderson's shooting star, sailor caps Shady sites February-May
RANUNCULACEAE Buttercup Family
Clematis lasiantha Virgin's bower Hillsides, chaparral, open woodland March-May
Delphinium hesperium ssp. pallescens Foothill delphinium Oak woodland April-June
Delphinium nudicaule Canyon delphinium Moist wooded, rocky slopes March-June
Delphinium patens Zigzag delphinium Grassland, woodland March-May
Ranunculus hebecarpus Pubescent-fruited buttercup Shaded sites, chaparral, oak/pine woodland March-May
Ranunculus occidentalis Western buttercup Flats, open woodland March-May
RHAMNACEAE Buckthorn Family
Ceanothus cuneatus Buck brush Dry slopes and fans March-May
Ceanothus oliganthus var. sorediatus Jim brush Dry, shrubby slopes February-May
Rhamnus californica Coffeeberry Chaparral, woodlands May-July
Rhamnus crocea Redberry Chaparral, woodlands March-April
ROSACEAE Rose Family
Adenostoma fasciculatum Chamise Common on dry slopes and ridges, chaparral May-June
Aphanes occidentalis Western lady's mantle Seasonally moist grassland, chaparral March-June
Cercocarpus betuloides Mountain mahogany Chaparral, oak/pine woodland March-May
Heteromeles arbutifolia Toyon Chaparral, oak woodland April-July
Holodiscus discolor Ocean spray, cream bush Woodland, rocky slopes May-August
Potentilla glandulosa Sticky cinquefoil Dry to moist sites, many habitats May-July
Rosa californica California wild rose Moist sites, especially streambanks May-August
Rosa gymnocarpa Wood rose Shaded woods, shrublands March-July
Rubus ursinus California blackberry Moist shrublands, streamside May
RUBIACEAE Madder Family
Galium aparine Cleavers Native to Europe Grassy, partly shaded places March-July
Galium bolanderi Bolander's bedstraw Chaparral May-August
Galium murale Tiny bedstraw Native to Europe Damp places, grassy hillsides April-May
Galium parisiense Wall bedstraw Native to Europe Warm, dry, generally rocky soil  April-August
Galium porrigens Climbing bedstraw Among shrubs in chaparral June
SALICACEAE Willow Family
Populus fremontii ssp. fremontii Fremont cottonwood Moist sites and streamside March-April
Salix exigua Sandbar willow Common along streams and arroyos March-May
Salix laevigata Red willow Streambanks
Salix lasiolepis Arroyo willow Common along stream banks and beds February-April
Salix melanopsis Dusky willow Stream banks March-May
SAXIFRAGACEAE Saxifrage Family
Lithophragma campanulatum Shady, well drained slopes April
Lithophragma heterophyllum Hill star Shaded slopes March-June
Saxifraga californica California saxifrage Moist, shady sites February-June
SCROPHULARIACEAE Figwort Family
Antirrhinum vexillo-calyculatum (7) Wiry snapdragon Lower slopes of rockslides, disturbed sites May-November
Castilleja affinis  Coast paintbrush Dry places in chaparral April-May
Castilleja applegatei ssp. martinii Martin's Indian paintbrush Dry, open scrub slopes May-September
Castilleja attenuata Valley tassels Grassland March-May
Castilleja exserta Purple owl's-clover Open fields, grassland March-May
Castilleja foliolosa Woolly paintbrush Dry open, rocky areas, chaparral March-June
Collinsia heterophylla Chinese houses Common in shaded sites March-June
Collinsia sparsiflora Spinster's blue-eyed Mary Grassy, disturbed sites, chaparral March-May
Keckiella lemmonii Lemmon's penstemon Chaparral, wooded slopes June-August
Mimulus aurantiacus Bush monkey flower Rocky slopes, disturbed sites, borders of chaparral March-August
Mimulus cardinalis Scarlet monkey flower Moist to wet sites along streams April-October
Mimulus guttatus Seepspring monkey flower Wet places March-August
Pedicularis densiflora Indian warrior Dry chaparral, oak/pine woodland January-June
Penstemon heterophyllus Foothill penstemon Grassland, chaparral April-July
Scrophularia californica California figwort Common in + damp areas, chaparral February-July
Tonella tenella Small-flowered tonella Moist shaded sites March-May
Triphysaria pusilla Dwarf orthocarpus Grassland April-May
Veronica persica Persian speedwell Native to Europe Fields, disturbed sites February-May
SOLANACEAE Nightshade Family
Solanum xanti Purple nightshade Shrubland, oak/pine woodland February-July
VALERIANACEAE Valerian Family
Plectritis ciliosa Long-spurred plectritis Open, partly shaded slopes March-May
Plectritis congesta Short-spurred plectritis Open, partly shaded slopes April-June
Plectritis macrocera White plectritis Open, partly shaded slopes April-May
VITACEAE Grape Family
Vitis californica California wild grape Stream banks, often climbing on shrubs and trees May-June
MONOCOTYLEDONS
CYPERACEAE Sedge Family
Carex nudata Torrent sedge Common, streambanks
Cyperus eragrostis Umbrella sedge Streambanks May-November
IRIDACEAE Iris Family
Iris fernaldii  (8) Fernald's iris Shaded sites April-May
Iris macrosiphon Long-tubed iris Open to partly shaded slopes April-May
Sisyrinchium bellum Blue-eyed grass Open grassland, woodland March-May
JUNCACEAE Rush Family
Juncus balticus Baltic rush Moist to dry sites sites May-August
Juncus bufonius Toad rush Moist, open, often disturbed sites April-September
Juncus mexicanus Mexican rush Moist areas May-August
Juncus patens Spreading rush Moist meadows and stream banks June-July
Juncus xiphioides Sword-leaved rush Common in moist areas May-October
LILIACEAE Lily Family
Allium serra Wild onion Grassy slopes March-May
Brodiaea elegans ssp. elegans Elegant brodiaea Grassland, open woodland May-June
Calochortus amabilis Golden fairy lantern Shady or open woodland, shrubland April-June
Calochortus luteus Gold nuggets Grassland, woodland May-June
Calochortus splendens Splendid mariposa Grassland, chaparral May-June
Chlorogalum pomeridianum Soap plant Grassland, chaparral May-August
Dichelostemma capitatum Blue dicks Open woodland, scrub, grassland March-May
Dichelostemma volubile Twining lily Foothill woodland, scrub Common
Fritillaria affinis Checker-lily Grassland, oak scrub February-May
Triteleia laxa Ithuriel's spear Grassland, woodland March-June
Triteleia lugens  (7) Edges of chaparral April-May
Zigadenus fremontii Fremont's star-lily Grassy or wooded slopes March-May
ORCHIDACEAE Orchid Family
Piperia elegans Rein-orchid Dry, open sites, scrubland May-September
POACEAE Grass Family
Agrostis exarata Pacific bent grass Moist open or disturbed sites June-August
Aira caryophyllea Hairgrass Native to Europe Open or disturbed sites April-June
Avena barbata Slender wild oat Native to Europe Disturbed sites March-June
Avena fatua Broad-leaved wild oat Native to Europe Disturbed sites April-June
Brachypodium distachyon Purple falsebrome Native to Eurasia Disturbed sites April-May
Briza minor Little quaking grass Native to Europe Shaded or moist, open sites April-June
Bromus carinatus California brome Open shrubland, woodland April-August
Bromus diandrus Ripgut grass Open, disturbed sites April-June
Bromus hordeaceus Soft chess Native to Europe Open, often disturbed sites April-July
Bromus laevipes Perennial smooth-stemmed brome Shrubland, pine woodland May-August
Bromus madritensis Foxtail chess Native to Europe Open, often disturbed sites April-June
Bromus madritensis ssp. rubens Red brome Native to southern Europe Open, often disturbed sites March-June
Bromus sterilis Poverty brome Native to Europe Open, often disturbed sites April-June
Cynodon dactylon Bermuda grass Native to Africa Disturbed sites March-May
Cynosurus echinatus Hedgehog dogtail From Europe Open, often disturbed sites April-June
Elymus glaucus Woodland wild rye Grassland, chaparral, woodland June-August
Elymus trachycaulis Slender wheat grass Dry to moist open areas, woodland.
Gastridium ventricosum Nit grass Native to Europe Open, often disturbed sites May-September
Hordeum marinum ssp. gussoneanum Mediterranian barley Native to Europe Dry to moist disturbed sites April-June
Hordeum murinumssp. leporinum Farmer's foxtail Native to Europe Moist, generally disturbed sites April-June
Lolium multiflorum Italian ryegrass Disturbed sites, abandoned fields March-May
Lolium temulentum Darnel Open, often disturbed sites April-June
Melica californica California melic grass Open hillsides, oak woodland April-May
Melica torreyana Small-flowered melic grass Shady oak woodland and chaparral March-June
Nassella lepida Foothill needlegrass Dry slopes, chaparral, oak grassland March-May
Nassella pulchra Purple needlegrass Grassland, chaparral, oak woodland March-May
Poa annua Annual bluegrass Native to Europe Disturbed, moist ground January-July
Poa bulbosa Bulbous bluegrass Native to Europe Disturbed sites April-July
Poa secunda ssp. secunda One-sided bluegrass Many habitats February-June
Polypogon maritimus Mediterranean beard grass Native to Europe Moist places June
Polypogon monspeliensis Beard grass Native to Europe Moist places April-August
Vulpia bromoides Brome fescue Native to Europe Disturbed sites, chaparral April-June
Vulpia microstachys var. ciliata Gray fescue Open, disturbed sites March-June
Vulpia microstachys var. confusa Small fescue Occasional on dry slopes March-June
Vulpia microstachys var. microstachys Stiff annual fescue Dry hillsides, open woodlands April-June
Vulpia microstachys var. pauciflora Dry hillsides, open woodlands April-June
Vulpia myuros var. hirsuta Foxtail fescue Native to Europe Common in dry, open areas March-June
Vulpia myuros var. myuros Rattail fescue Native to Europe Dry hillsides, open woodlands March-May
TYPHACEAE Cattail Family
Typha angustifolia Narrow-leaved cattail Marsh and moist areas June
 
FOOTNOTES:
(1) Rare
(2) Parasitic on many herbaceous and woody plants
(3) Common
(4) Parasite of Adenostoma fasciculatum
(5) Occasional parasite of Artemisia, Eriogonum, Eriodictyon, etc.
(6) Parasite of Saxifraga
(7) Uncommon
(8) Apparent hybrid with Iris macrosiphon, may be only a local form of latter