| Achillea millefolium | yarrow |
| Achyrachaena mollis | blow-wives |
| Ageratina adenophora | |
| Agoseris grandiflora var. grandiflora | perennial |
| Agoseris heterophylla var. cryptopleura | annual |
| Agoseris heterophylla var. heterophylla | |
| Agoseris retrorsa | |
| Ambrosia chamissonis | beach-bur |
| Ambrosia psilostachya | western ragweed |
| Anaphalis margaritacea | pearly everlasting |
| Ancistrocarphus filagineus | woolly fishhook |
| Anisocarpus madioides | |
| Anthemis cotula | mayweed, dog-fennel |
| Argyranthemum foeniculaceum | |
| Arnica discoidea | |
| Artemisia biennis | biennial wormwood |
| Artemisia californica | California sagebrush |
| Artemisia douglasiana | mugwort |
| Artemisia dracunculus | tarragon |
| Baccharis glutinosa | marsh baccharis |
| Baccharis pilularis subsp. consanguinea | coyote brush |
| Baccharis pilularis subsp. pilularis | |
| Baccharis salicifolia subsp. salicifolia | mule fat, seepwillow |
| Balsamorhiza deltoidea | |
| Balsamorhiza macrolepis | |
| Bellis perennis | English daisy |
| Bidens frondosa | sticktight |
| Bidens laevis | bur-marigold |
| Blennosperma nanum var. nanum | |
| Blepharizonia laxa | glandular big tarplant |
| Blepharizonia plumosa | big tarplant |
| Brickellia californica | California brickelbush |
| Calendula arvensis | field-marigold |
| Calendula officinalis | pot-marigold |
| Calycadenia multiglandulosa | |
| Calycadenia truncata | rosin weed |
| Carduus pycnocephalus subsp. pycnocephalus | Italian thistle |
| Carduus tenuiflorus | |
| Centaurea calcitrapa | purple star-thistle |
| Centaurea cyanus | bachelor's button, cornflower |
| Centaurea iberica | Iberian starthistle |
| Centaurea melitensis | tocalote, Maltese start-thistle |
| Centaurea solstitialis | yellow star-thistle |
| Centromadia fitchii | Fitch's spikeweed |
| Centromadia parryi subsp. congdonii | Congdon's tarplant |
| Centromadia pungens subsp. pungens | common spikeweed |
| Chaenactis glabriuscula var. glabriuscula | yellow pincushion |
| Chaenactis glabriuscula var. heterocarpha | yellow pincushion |
| Chaenactis glabriuscula var. megacephala | |
| Cichorium intybus | chicory |
| Cirsium andrewsii | Franciscan thistle |
| Cirsium brevistylum | Indian thistle |
| Cirsium cymosum var. cymosum | peregrine thistle |
| Cirsium douglasii var. douglasii | swamp thistle |
| Cirsium fontinale var. campylon | Hamilton thistle |
| Cirsium occidentale var. californicum | California thistle |
| Cirsium occidentale var. venustum | venus thistle |
| Cirsium quercetorum | brownie thistle |
| Cirsium remotifolium var. odontolepis | |
| Cirsium vulgare | bull thistle |
| Corethrogyne filaginifolia | |
| Cotula australis | |
| Cotula coronopifolia | brass-buttons |
| Crepis bursifolia | |
| Crepis capillaris | |
| Crepis monticola | |
| Crepis vesicaria subsp. taraxacifolia | |
| Crocidium multicaule | spring gold |
| Cynara cardunculus | artichoke thistle, cardoon |
| Deinandra bacigalupii | Livermore moonshine |
| Deinandra corymbosa | |
| Deinandra kelloggii | |
| Deinandra lobbii | |
| Delairea odorata | German-ivy |
| Dittrichia graveolens | stinkwort |
| Eclipta prostrata | |
| Ericameria arborescens | golden-fleece |
| Ericameria linearifolia | interior goldenbush |
| Ericameria nauseosa var. mohavensis | rabbitbrush |
| Erigeron bonariensis | |
| Erigeron canadensis | horseweed |
| Erigeron foliosus var. franciscensis | |
| Erigeron petrophilus var. petrophilus | |
| Erigeron philadelphicus var. philadelphicus | |
| Erigeron reductus var. angustatus | |
| Erigeron sumatrensis | |
| Eriophyllum confertiflorum var. confertiflorum | golden-yarrow |
| Eriophyllum jepsonii | Jepson's woolly-sunflower |
| Eriophyllum lanatum var. achilleoides | |
| Eriophyllum staechadifolium | seaside woolly-sunflower |
| Eurybia radulina | broad-leaf aster |
| Euthamia occidentalis | western goldenrod |
| Gamochaeta pensylvanica | |
| Gamochaeta ustulata | featherweed |
| Glebionis segetum | corn chrysanthemum |
| Gnaphalium palustre | lowland cudweed |
| Grindelia camporum | |
| Grindelia hirsutula | |
| Grindelia stricta var. angustifolia | marsh gumplant |
| Gutierrezia californica | California matchweed |
| Hedypnois rhagadioloides | |
| Helenium bigelovii | |
| Helenium puberulum | sneezeweed |
| Helianthella californica var. californica | helianthella |
| Helianthella castanea | Diablo helianthella |
| Helianthus annuus | sunflower |
| Helianthus californicus | California sunflower |
| Helianthus gracilentus | |
| Helminthotheca echioides | bristly ox-tongue |
| Hemizonia congesta subsp. lutescens | |
| Hemizonia congesta subsp. luzulifolia | |
| Hesperevax caulescens | hogwallow starfish |
| Hesperevax sparsiflora var. sparsiflora | |
| Heterotheca grandiflora | telegraph weed |
| Heterotheca oregona var. rudis | Oregon goldenaster |
| Heterotheca oregona var. scaberrima | goldenaster |
| Heterotheca sessiliflora subsp. bolanderi | Bolander's goldenaster |
| Heterotheca sessiliflora subsp. echioides | |
| Hieracium albiflorum | white hawkweed |
| Holocarpha heermannii | Heermann's tarweed |
| Holocarpha macradenia | Santa Cruz tarplant |
| Holocarpha obconica | |
| Holocarpha virgata subsp. virgata | |
| Holozonia filipes | Greene's white crown |
| Hypochaeris glabra | smooth cat's ear |
| Hypochaeris radicata | rough cat's ear |
| Iva axillaris | poverty weed |
| Jaumea carnosa | |
| Lactuca saligna | |
| Lactuca serriola | prickly lettuce |
| Lactuca virosa | |
| Laennecia coulteri | |
| Lagophylla ramosissima | hare's-ear |
| Lapsana communis | |
| Lasthenia californica subsp. californica | goldfields |
| Lasthenia conjugens | Contra Costa goldfields |
| Lasthenia ferrisiae | |
| Lasthenia fremontii | goldfields |
| Lasthenia glaberrima | goldfields |
| Lasthenia glabrata subsp. glabrata | |
| Lasthenia gracilis | |
| Lasthenia microglossa | |
| Lasthenia minor | |
| Lasthenia platycarpha | |
| Layia chrysanthemoides | |
| Layia gaillardioides | woodland tidy-tips |
| Layia hieracioides | tall tidy-tips |
| Layia platyglossa | tidy-tips |
| Leptosyne calliopsidea | |
| Leptosyne hamiltonii | Mt. Hamilton coreopsis |
| Lessingia nemaclada | |
| Lessingia pectinata var. tenuipes | |
| Lessingia ramulosa | |
| Lessingia tenuis | spring lessingia |
| Logfia filaginoides | herba impia |
| Logfia gallica | |
| Madia elegans | common madia |
| Madia exigua | threadstem madia |
| Madia gracilis | slender tarweed |
| Madia sativa | coast tarweed |
| Malacothrix clevelandii | Cleveland's malacothrix |
| Malacothrix coulteri | snake's-head |
| Malacothrix floccifera | |
| Matricaria discoidea | pineapple weed |
| Micropus californicus var. californicus | slender cottonweed |
| Micropus californicus var. subvestitus | |
| Microseris acuminata | |
| Microseris campestris | |
| Microseris douglasii subsp. douglasii | silver puffs |
| Microseris douglasii subsp. tenella | |
| Microseris elegans | |
| Microseris sylvatica | |
| Monolopia gracilens | |
| Monolopia lanceolata | |
| Monolopia major | |
| Packera breweri | Brewer groundsel |
| Pentachaeta alsinoides | tiny pygmy daisy |
| Pentachaeta exilis subsp. exilis | meager pygmy daisy |
| Petasites frigidus var. palmatus | coltsfoot |
| Pluchea odorata var. odorata | saltmarsh fleabane |
| Pseudognaphalium beneolens | |
| Pseudognaphalium biolettii | |
| Pseudognaphalium californicum | |
| Pseudognaphalium luteoalbum | cudweed |
| Pseudognaphalium microcephalum | |
| Pseudognaphalium ramosissimum | |
| Pseudognaphalium stramineum | |
| Pseudognaphalium thermale | |
| Psilocarphus brevissimus var. brevissimus | dwarf woolly-marbles |
| Psilocarphus chilensis | round woolly-marbles |
| Psilocarphus oregonus | Oregon woolly-marbles |
| Psilocarphus tenellus | slender woolly-marbles |
| Rafinesquia californica | California chicory |
| Rhaponticum repens | Russian knapweed |
| Rigiopappus leptocladus | |
| Scolymus hispanicus | golden thistle |
| Senecio aronicoides | rayless ragwort |
| Senecio flaccidus var. douglasii | Douglas' ragwort |
| Senecio glomeratus | cutleaf burnweed |
| Senecio hydrophilus | water ragwort |
| Senecio jacobaea | tansy ragwort |
| Senecio minimus | Australian fireweed |
| Senecio sylvaticus | woodland ragwort |
| Senecio vulgaris | common groundsel |
| Silybum marianum | milk-thistle |
| Solidago elongata | Canada goldenrod |
| Solidago velutina subsp. californica | California goldenrod |
| Soliva sessilis | |
| Sonchus asper subsp. asper | prickly sow-thistle |
| Sonchus oleraceus | common sow-thistle |
| Sonchus tenerrimus | |
| Stebbinsoseris heterocarpa | |
| Stephanomeria elata | |
| Stephanomeria exigua subsp. coronaria | |
| Stephanomeria virgata subsp. pleurocarpa | |
| Stylocline gnaphaloides | nest-straw |
| Symphyotrichum chilense | Pacific aster |
| Symphyotrichum lanceolatum var. hesperium | |
| Symphyotrichum lentum | Suisun Marsh aster |
| Symphyotrichum spathulatum | |
| Symphyotrichum subulatum var. parviflorum | |
| Tanacetum parthenium | feverfew |
| Taraxacum erythrospermum | red-seeded dandelion |
| Taraxacum officinale | common dandelion |
| Tragopogon porrifolius | salsify |
| Uropappus lindleyi | silver puffs |
| Urospermum picroides | false hawkbit |
| Verbesina encelioides subsp. exauriculata | golden crownbeard |
| Wyethia angustifolia | narrowleaf mule-ears |
| Wyethia glabra | mules ears |
| Wyethia helenioides | woolly mules ears |
| Xanthium orientale | cocklebur |
| Xanthium spinosum | spiny cocklebur |