Ear drops, Golden (Dicentra chrysantha)
Early onion (Allium praecox)
Earth brodiaea (Brodiaea terrestris ssp. kernensis)
Eastern joshua tree (Yucca jaegeriana)
Eastern threadplant (Nemacladus orientalis)
East Mojave buckwheat (Eriogonum fasciculatum var. flavoviride)
Eastwood manzanita (Arctostaphylos glandulosa ssp. zacaensis)
Eastwood's baby blue eyes (Nemophila pulchella var. pulchella)
Eastwood's fiddleneck (Amsinckia eastwoodiae)
Eastwood's threadplant (Nemacladus eastwoodiae)
Edible fig (Ficus carica)*
Egg milkvetch (Astragalus oophorus var. oophorus)
Elderberry,
    Mexican (Sambucus mexicana)
    Red (Sambucus racemosa var. racemosa)
Elegant alumroot (Heuchera caespitosa)
Elegant clarkia (Clarkia unguiculata)
Elegant rock-cress, see California rock-cress
Elephant tree (Bursera microphylla)
Elk thistle (Cirsium scariosum var. congdonii)
Elmer's cinguefoil (Potentilla gracilis var. elmeri)
El Paso gilia (Gilia mexicana)
Emory baccharis, see Willow baccharis
Emory indigo bush (Psorothamnus emoryi)
Encelia,
    Acton (Encelia actoni)
    Green (Encelia virginensis)
    Rayless (Encelia frutescens)
Encinitas baccharis (Baccharis vanessae)
Engelmann oak (Quercus engelmannii)
Engelmann's hedgehog cactus (Echinocereus engelmannii)
English daisy (Bellis perennis)*
English ivy (Hedera helix)*
English plantain (Plantago lanceolata)*
Enigmatic bush mallow (Malacothamnus enigmaticus)
Entire-leaved thelypodium (Thelypodium integrifolium ssp. affine)
Ephedra,
    California (Ephedra californica)
    Green (Ephedra viridis)
    Nevada (Ephedra nevadensis)
Erect golden-aster (Heterotheca sessiliflora ssp. fastigiata)
Eschscholtz's buttercup (Ranunculus eschscholtzii var. oxynotus)
Esteve pincushion, see Desert pincushion
Estuary sea-blite (Suaeda esteroa)
Eucrypta,
    Common (Eucrypta chrysanthemifolia var. chrysanthemifolia)
    Small-flowered (Eucrypta micrantha)
    Torrey's (Eucrypta chrysanthemifolia var. bipinnatifida)
Eureka Dunes evening primrose (Oenothera avita ssp. eurekensis)
Eureka Valley dune grass (Swallenia alexandrae)
European yellow lupine (Lupinus luteus)*
Evening primrose,
    Basket (Oenothera deltoides ssp. deltoides)
    Booth's clustered (Eremothera boothii ssp. condensata)
    Booth's desert (Eremothera boothii ssp. desertorum)
    Booth's intermediate (Eremothera boothii ssp. intermedia)
    Booth's shredding (Eremothera boothii ssp. decorticans)
    California (Oenothera californica ssp. californica)
    Cave (Oenothera cavernae)
    Desert (Oenothera californica ssp. avita)
    Eureka Dunes (Oenothera avita ssp. eurekensis)
    Hairy (Oenothera elata ssp. hirsutissima)
    Hooker's (Oenothera elata ssp. hookeri)
    Mexican (Oenothera speciosa)*
    Rose (Oenothera rosea)*
    Small (Camissoniopsis micrantha)
    Tufted (Oenothera cespitosa ssp. marginata)
Evening snow (Linanthus dichotomus)
Evergreen currant (Ribes viburnifolium)
Everlasting,
    California (Pseudognaphalium californicum)
    Feltleaf (Pseudognaphalium microcephalum)
    Fragrant (Pseudognaphalium beneolens)
    Slender (Pseudognaphalium thermale)
    Two-tone (Pseudognaphalium biolettii)
Everlasting neststraw (Stylocline gnaphaloides)
Ewan's cinquefoil (Drymocallis cuneifolia var. ewanii)
Eyed gilia (Gilia ophthalmoides)
Fagonia,
    Smooth-stemmed (Fagonia laevis)
    Sticky (Fagonia pachyacantha)
Fairy duster, Pink (Calliandra eriophylla)
Fairyfan, Gunsight (Clarkia xantiana)
Fairy lantern (Calochortus albus)
False-brome, Purple (Brachypodium distachyon)*
False-clover (Cleomella oxystyloides)
False-daisy (Eclipta prostrata)
False-indigo,
    California (Amorpha californica var. californica)
    Western (Amorpha fruticosa)
False-gilia,
    Dense (Allophyllum gilioides ssp. gilioides)
    Purple (Allophyllum divaricatum)
    Sticky (Allophyllum glutinosum)
    Violet (Allophyllum gilioides ssp. violaceum)
    White (Allophyllum integrifolium)
False-lupine,
    Silvery (Thermopsis californica var. argentata)
    Velvety (Thermopsis californica var. semota)
False solomon's seal,
    [Common] (Maianthemum racemosum)
    Star-flowered (Maianthemum stellatum)
False-spineflower (Hollisteria lanata)
Fan leaf (Psathyrotes annua)
Fanleaf crinklemat (Tiquilia plicata)
Fan palm, California (Washingtonia filifera)
Feltleaf everlasting (Pseudognaphalium microcephalum)
Fendlerbush, Utah (Fendlerella utahensis)
Fendler's bluegrass (Poa fendleriana ssp. longiligula)
Fendler's ground-cherry (Physalis hederifolia var. fendleri)
Fendler's meadow-rue (Thalictrum fendleri var. fendleri)
Fennel, Sweet (Foeniculum vulgare)*
Ferguson's bearded cryptantha (Cryptantha barbigera var. fergusoniae)
Fern,
    African asparagus (Asparagus asparagoides)*
    Bird's-foot (Pellaea mucronata var. mucronata)
    Bracken (Pteridium aquilinum var. pubescens)
    Brittle (Cystopteris fragilis)
    California cloak (Notholaena californica)
    California lace (Aspidotis californica)
    California maidenhair (Adiantum jordanii)
    Cliff sword (Polystichum imbricans ssp. curtum)
    Clover (Marsilea vestita ssp. vestita)
    Coastal silverback (Pentagramma viscosa)
    Coastal wood (Dryopteris arguta)
    Coffee (Pellaea andromedifolia)
    Cotton (Cheilanthes newberryi)
    Five-finger (Adiantum aleuticum)
    Giant chain (Woodwardia fimbriata)
    Goldback (Pentagramma triangularis ssp. triangularis)
    Jones' cloak (Argyrochosma jonesii)
    Lady (Athyrium filix-femina var. cyclosorum)
    Maidenhair (Adiantum capillus-veneris)
    Mountain holly (Polystichum scopulinum)
    Scaly cloak (Astrolepis cochisensis)
    Sonoran maiden (Pelazoneuron puberulum var. sonorensis)
    Western sword (Polystichum munitum)
Fernleaf ironwood (Lyonothamnus floribundus ssp. aspleniifolius)
Fernleaf lomatium (Lomatium multifidum)
Fescue,
    Rattail (Festuca myuros)*
    Red (Festuca rubra)
    Small (Festuca microstachys)
    Spike (Festuca kingii)
    Tall (Festuca arundinacea)*
Feverfew (Tanacetum parthenium)*
Few-flowered blue dicks (Dipterostemon capitatus ssp. pauciflorus)
Few-flowered caltrop (Kallstroemia parviflora)
Few-flowered heterocodon (Heterocodon rariflorum)
Few-flowered meadow-rue (Thalictrum sparsiflorum)
Few-flowered naked buckwheat (Eriogonum nudum var. pauciflorum)
Few-flowered woolstar (Eriastrum sparsiflorum)
Few-leaved checkerbloom (Sidalcea sparsifolia)
Fiddle dock (Rumex pulcher)*
Fiddleleaf, California (Nama californica)
Fiddleneck,
    Bristly (Amsinckia tessellata var. gloriosa)
    Checker (Amsinckia tessellata var. tessellata)
    Common (Amsinckia intermedia)
    Eastwood's (Amsinckia eastwoodiae)
    Rigid (Amsinckia retrorsa)
    Seaside (Amsinckia spectabilis var. spectabilis)
    Small-flowered (Amsinckia retrorsa)
Field hedge-parsley (Torilis arvensis)*
Field madder (Sherardia arvensis)*
Field mint (Mentha arvensis)*
Field mustard (Brassica rapa)*
Field willow-herb (Epilobium brachycarpum)
Fiesta flower,
    [Common] (Pholistoma auritum var. auritum)
    White (Pholistoma membranaceum)
Figwort,
    California (Scrophularia californica)
    Desert (Scrophularia desertorum)
Filago,
    California (Logfia filaginoides)
    Dwarf (Logfia depressa)
    Narrow-leaf (Logfia gallica)*
Filaree,
    Red-stem (Erodium cicutarium)*
    Short-fruited (Erodium brachycarpum)*
    White-flowered (California macrophylla)
    White-stem (Erodium moschatum)*
Fine-flower gilia (Gilia leptantha ssp. leptantha)
Fineleaf hymenopappus (Hymenopappus filifolius var. megacephalus)
Firecracker penstemon (Penstemon eatonii var. undosus)
Fire evax, see Stemless evax
Fire poppy (Papaver californicum)
Fireweed (Chamerion angustifolium ssp. circumvagum)
Fir, White (Abies concolor)
Fishhook cactus (Mammillaria tetrancistra)
Fish's milkwort (Rhinotropis cornuta var. fishiae)
Five-finger fern (Adiantum aleuticum)
Five-hook bassia (Bassia hyssopifolia)*
Five-needled thymophylla (Thymophylla pentachaeta var. belenidium)
Five-tooth spineflower (Chorizanthe watsonii)
Fivespot,
    [Common] (Nemophila maculata)
    Desert (Eremalche rotundifolia)
Flannel bush,
    [Common] (Fremontodendron californicum)
    Mexican (Fremontodendron mexicanum)
Flatcrown buckwheat (Eriogonum deflexum var. deflexum)
Flat-leaf summer-holly (Comarostaphylis diversifolia ssp. planifolia)
Flat sagebrush (Artemisia bigelovii)
Flat-topped broomrape (Aphyllon corymbosum)
Flat-topped buckwheat (Eriogonum plumatella)
Flax,
    Common (Linum usitatissimum)*
    Plains (Linum puberulum)
    Small-flowered dwarf (Hesperolinon micranthum)
    Western blue (Linum lewisii var. lewisii)
Flax-flowered linanthus (Leptosiphon liniflorus)
Flax-leaved monardella (Monardella linoides ssp. linoides)
Fleabane,
    Brewer's (Erigeron breweri var. breweri)
    Coville's (Erigeron breweri var. covillei)
    Mojave Brewer's (Erigeron breweri var. porphyreticus)
    Navajo (Erigeron concinnus)
    Parish's (Erigeron parishii)
    Pinzl's (Erigeron clokeyi var. pinzliae)
    Rayless (Erigeron aphanactis var. congestus)
    Rayless shaggy (Erigeron aphanactis var. aphanactis)
    Salt marsh (Pluchea odorata var. odorata)
    San Jacinto Mountains (Erigeron breweri var. jacinteus)
    Shortray (Erigeron lonchophyllus)
    Spreading (Erigeron divergens)
Flix weed (Descurainia sophia)*
Flowering quillwort (Triglochin scilloides)
Fluff grass (Dasyochloa pulchella)
Foothill lupine, see Arroyo lupine
Foothill needlegrass (Stipa lepida)
Foothill penstemon (Penstemon heterophyllus var. heterophyllus)   
Foothill shooting star (Primula hendersonii)
Forest camp sandwort (Eremogone macradenia var. arcuifolia)
Forest goosefoot (Chenopodium atrovirens)
Forest sedge (Carex multicaulis)
Fort Mojave buckwheat (Eriogonum ordii)
Fosberg's cholla (Cylindropuntia fosbergii)
Fountaingrass (Pennisetum setaceum)*
Four o'clock,
    Bigelow's desert (Mirabilis laevis var. villosa)
    Cultivated (Mirabilis jalapa var. jalapa)*
    Dwarf (Mirabilis albida)
    Giant (Mirabilis multiflora var. pubescens)
    Red (Mirabilis coccinea)
    Retrorse desert (Mirabilis laevis var. retrorsa)
    Slender-lobed (Mirabilis tenuiloba)
Four-leaf allseed (Polycarpon tetraphyllum ssp. tetraphyllum)*
Four-needle pinyon pine (Pinus quadrifolia)
Four-valved tobacco (Nicotiana quadrivalvis)
Four-wing saltbush (Atriplex canescens var. canescens)
Fowl mannagrass (Glyceria elata)
Foxglove (Digitalis purpurea)*
Foxtail barley (Hordeum murinum ssp. glaucum)*
Fragile-sheathed sedge (Carex fracta)
Fragrant everlasting (Pseudognaphalium beneolens)
Fragrant pitcher sage (Lepechinia fragrans)
Fragrant shooting star (Primula fragrans)
Fragrant snakeroot (Ageratina herbacea)
Fragrant snowberry (Symphoricarpos longiflorus)
Franciscan broomrape (Aphyllon franciscanum)
Frankenia, Palmer's (Frankenia palmeri)
Fremont's barberry (Berberis fremontii)
Fremont's bush mallow (Malacothamnus fremontii)
Fremont's cottonwood (Populus fremontii ssp. fremontii)
Fremont's goosefoot (Chenopodium fremontii)
Fremont's milkvetch (Astragalus lentiginosus var. fremontii)
Fremont's monkeyflower (Diplacus fremontii)
Fremont's phacelia (Phacelia fremontii)
Fremont's pincushion (Chaenactis fremontii)
Fremont's silktassel (Garrya fremontii)
Fremont's syntrichopappus (Syntrichopappus fremontii)
Fremont's thornbush (Lycium fremontii)
French broom (Genista monspessulana)*
Fringed amaranth (Amaranthus fimbriatus)
Fringed gentian, One-flowered, see Hiker's gentian
Fringed onion (Allium fimbriatum var. fimbriatum)
Fringed spineflower (Chorizanthe fimbriata var. fimbriata)
Fringe-pod (Thysanocarpus curvipes)
Fringe-pod, Santa Cruz Island (Thysanocarpus conchuliferus)
Fritillary,
    Ojai (Fritillaria ojaiensis)
    Pinewoods (Fritillaria pinetorum)
Frostmat (Achyronychia cooperi)
Fuchsia,
    California (Epilobium canum ssp. latifolium)
    Hoary (Epilobium canum ssp. canum)
Fuchsia-flowered gooseberry (Ribes speciosum)
Funnel bluebells (Phacelia campanularia var. vasiformis)
Gambel's dwarf milkvetch (Astragalus gambelianus)
Gander's cholla (Cylindropuntia ganderi)
Gaping goosefoot (Chenopodium hians)
Gaping penstemon (Keckiella breviflora var. breviflora)
Garden stock (Matthiola incana)*
Garland chrysanthemum (Glebionis coronaria)*
Gentian,
    Autumn dwarf (Gentianella amarella ssp. acuta)
    Catchfly (Eustoma exaltatum ssp. exaltatum)
    Hiker's (Gentianopsis simplex)
    Moss (Gentiana fremontii)
Geranium,
    California (Geranium californicum)
    Carolina (Geranium carolinianum)
    Cutleaf (Geranium dissectum)*
    Dovefoot (Geranium molle)*
    Roundleaf (Geranium rotundifolium)*
German-ivy, see Cape-ivy
Geyer's willow (Salix geyeriana)
Ghost flower (Antirrhinum confertiflorum)
Ghostly rubber rabbitbrush (Ericameria nauseosa ssp. hololeuca)
Giant blazing star (Mentzelia laevicaulis)
Giant chain fern (Woodwardia fimbriata)
Giant coreopsis (Leptosyne gigantea)
Giant four o'clock (Mirabilis multiflora var. pubescens)
Giant horsetail (Equisetum telmateia ssp. braunii)
Giant hyssop (Agastache urticifolia)
Giant reed (Arundo donax)*
Giant saguaro (Carnegiea gigantea)
Giant sequoia (Sequoiadendron giganteum)*
Giant Spanish needles (Palafoxia arida var. gigantea)
Giant stipa (Stipa coronata)
Giant wildrye (Elymus condensatus)
Giant woolstar (Eriastrum densifolium ssp. elongatum)
Gilia,
    Argus (Gilia brecciarum ssp. neglecta)
    Banded volcanic (Gilia ochroleuca ssp. bizonata)
    Bell (Linanthus campanulatus)
    Birdseye (Gilia tricolor ssp. diffusa)
    Bridges' (Navarretia leptalea ssp. bicolor)
    Broad-flowered (Gilia latiflora ssp. latiflora)
    Broad-leaf (Aliciella latifolia ssp. latifolia)
    Caraway-leaved (Saltugilia caruifolia)
    Chaparral (Gilia angelensis)
    Clokey's (Gilia clokeyi)
    Cream (Leptosiphon chrysanthus ssp. decorus)
    Cuyama (Gilia latiflora ssp. cuyamensis)
    Davy (Gilia latiflora ssp. davyi)
    Decumbent (Gilia jacens)
    Desert pale (Aliciella hutchinsifolia)
    El Paso (Gilia mexicana)
    Eyed (Gilia ophthalmoides)
    Fine-flower (Gilia leptantha ssp. leptantha)
    Globe (Gilia capitata ssp. abrotanifolia)
    Golden (Leptosiphon aureus ssp. aureus)
    Grant's, see Grant's woodland-gilia
    Great Basin (Aliciella leptomeria)
    Latimer's, see Latimer's woodland-gilia
    Little (Gilia minor)
    Miniature (Navarretia capillaris)
    Modoc (Gilia modocensis)
    Nevada (Gilia brecciarum ssp. brecciarum)
    Puff-calyx (Gilia aliquanta ssp. aliquanta)
    Purpus's (Gilia leptantha ssp. purpusii)
    Rock (Gilia scopulorum)
    Rosy (Gilia sinuata)
    San Bernardino showy (Gilia cana ssp. bernardina)
    Sand (Aliciella triodon)
    San Diego (Gilia diegensis
    San Gabriel Mountains (Gilia ochroleuca ssp. vivida)
    Showy (Gilia cana ssp. speciformis)
    Slender volcanic (Gilia ochroleuca ssp. exilis)
    Southern, see Southern woodland-gilia
    Splendid, see Splendid woodland-gilia
    Spreading (Ipomopsis polycladon)
    Star (Gilia stellata)
    Threadstem (Linanthus filiformis)
    Three-headed showy (Gilia cana ssp. triceps)
    Transmontane gilia (Gilia transmontana)
    Transverse fine-flower (Gilia leptantha ssp. transversa)
    Volcanic (Gilia ochroleuca ssp. ochroleuca)
    Western (Gilia aliquanta ssp. breviloba)
Gilman's buckwheat (Eriogonum gilmanii)
Gilman's cymopterus (Cymopterus gilmanii)
Gilman's milkvetch (Astragalus gilmanii)
Glandular showy penstemon (Penstemon spectabilis var. subviscosus)
Glandular threadplant (Nemacladus glanduliferus)
Glandular willow-herb (Epilobium ciliatum ssp. glandulosum)
Glasswort (Arthrocnemum subterminale)
Globe chamomile (Oncosiphon piluliferum)*
Globe gilia (Gilia capitata ssp. abrotanifolia)
Globemallow,
    Coulter's (Sphaeralcea coulteri)
    Desert (Sphaeralcea ambigua var. rugosa)
    Narrow-leaved (Sphaeralcea angustifolia)
Goldback fern
    [Common] (Pentagramma triangularis ssp. triangularis)
    Maxon's (Pentagramma maxonii)
Golden-aster,
    Bristly (Heterotheca sessiliflora ssp. echioides)
    Erect (Heterotheca sessiliflora ssp. fastigiata)
    Rough hairy (Heterotheca villosa var. scabra)
Golden bowl mariposa lily (Calochortus concolor)
Goldenbush,
    Boundary (Ericameria brachylepis)
    Bracted alkali (Isocoma acradenia var. bracteosa)
    Coast (Isocoma menziesii var. vernonioides)
    Cooper's (Ericameria cooperi var. cooperi)
    Decumbent (Isocoma menziesii var. decumbens)
    Dwarf (Ericameria nana)
    Interior (Ericameria linearifolia)
    Laguna Mountains (Ericameria cuneata var. macrocephala)
    Menzies' (Isocoma menziesii var. menziesii)
    Palmer's (Ericameria palmeri var. pachylepis)
    Parish's (Ericameria parishii var. parishii)
    Pine (Ericameria pinifolia)
    Prostrate coast (Isocoma menziesii var. sedoides)
    Rock (Ericameria cuneata var. cuneata)
    Sawtooth (Hazardia squarrosa var. grindelioides)
    Solitary-leaved alkali (Isocoma acradenia var. eremophila)
    Wide-leaved rock (Ericameria cuneata var. spathulata)
Golden chinch flower (Pectis papposa var. papposa)
Golden crownbeard (Verbesina encelioides ssp. exauriculata)
Golden currant (Ribes aureum var. gracillimum)
Golden eardrops (Ehrendorferia chrysantha)
Goldeneye,
    Mojave (Bahiopsis reticulata)
    Parish's (Bahiopsis parishii)
    San Diego County (Bahiopsis laciniata)
Golden-fleece (Ericameria arborescens)
Golden gilia (Leptosiphon chrsanthus ssp. chrysanthus)
Goldenheads,
    [Common] (Acamptopappus sphaerocephalus var. sphaerocephalus)
    Hairy (Acamptopappus sphaerocephalus var. hirtellus)
    Shockley's (Acamptopappus shockleyi)
Golden-rayed pentachaeta (Pentachaeta aurea ssp. aurea)
Goldenrod,
    California (Solidago velutina ssp. californica)
    Southern (Solidago confinis)
    Western (Euthamia occidentalis)
Golden sedge (Carex aurea)
Golden-spined cereus (Bergerocactus emoryi)
Golden stars (Bloomeria crocea var. crocea)
Goldentop grass (Lamarckia aurea)*
Golden wattle (Acacia longifolia)*
Goldenweed, Slender (Xanthisma gracile)
Golden yarrow (Eriophyllum confertiflorum var. confertiflorum)
Goldfields,
    California (Lasthenia californica ssp. californica)
    [Common] (Lasthenia gracilis)
    Rayless (Lasthenia glaberrima)
    Royal (Lasthenia coronaria)
Goldflower, Cooper's (Hymenoxys cooperi)
Goodding's black willow (Salix gooddingii)
Goodding's verbena (Verbena gooddingii)
Gooseberry,
    Bitter (Ribes amarum)
    Desert (Ribes velutinum)
    Fuchsia-flowered (Ribes speciosum)
    Hillside (Ribes californicum var. hesperium)
    Mountain (Ribes montigenum)
    Oak (Ribes quercetorum)
    Santa Cruz Island (Ribes thacherianum)
    Sierra (Ribes roezlii var. roezlii)
Goosefoot,
    Aridland (Chenopodium desiccatum)
    California (Chenopodium californicum)
    Coast (Chenopodium macrospermum)*
    Forest (Chenopodium atrovirens)
    Fremont's (Chenopodium fremontii)
    Gaping (Chenopodium hians)
    Jerusalem-oak (Dysphania botrys)*
    Meadow (Chenopodium pratericola)
    Nettleleaf (Chenopodium murale)*
    Pitseed (Chenopodium berlandieri)
Goosefoot bur-sage (Ambrosia chenopodiifolia)
Goosefoot violet (Viola purpurea ssp. purpurea)
Graceful bedstraw (Galium porrigens var. porrigens)
Graceful tarplant (Holocarpha virgata ssp. elongata)
Grama,
    Black (Bouteloua eriopoda)
    Blue (Bouteloua gracilis)
    Needle (Bouteloua aristidoides var. aristidoides)
    Red (Bouteloua trifida)
    Side-oats (Bouteloua curtipendula)
Grand hound's tongue (Adelinia grandis)
Grand juniper (Juniperus grandis)
Grant's carpet clover (Trifolium monanthum ssp. grantianum)
Grant's woodland-gilia (Saltugilia splendens ssp. grantii)
Grape soda lupine (Lupinus excubitus var. excubitus)
Grape, Wild (Vitis girdiana)
Grass,
    Bermuda (Cynodon dactylon)*
    Big galleta (Hilaria rigida)
    Blue-eyed (Sisyrinchium bellum)
    Common Mediterranean (Schismus barbatus)*
    Cord (Spartina foliosa)
    Dallis (Paspalum dilatatum)*
    Desert panic (Panicum urvilleanum)
    Ditch beard (Polypogon interruptus)*
    Goldentop (Lamarckia aurea)*
    Harding (Phalaris aquatica)*
    Kikuyu (Pennisetum clandestinum)*
    Knot (Paspalum distichum)
    Nit (Gastridium phleoides)*
    Rabbitsfoot grass (Polypogon monspeliensis)*
    Salt (Distichlis spicata)
    Shore (Distichlis littoralis)
    Smilo (Stipa miliacea)*
Grass-of-parnassus (Parnassia palustris)
Gravel cryptantha (Cryptantha decipiens)
Gravel ghost (Atrichoseris platyphylla)
Gravel milkvetch (Astragalus sabulonum)
Gray chickensage (Sphaeromeria cana)
Gray herniaria (Herniaria hirsuta var. cinerea)*
Grayleaf skullcap (Scutellaria siphocampyloides)
Gray-leaved violet (Violet pinetorum ssp. grisea)
Gray monardella (Monardella australis ssp. cinerea)
Gray pine (Pinus sabiniana)
Greasebush, Spiny (Glossopetalon spinescens var. aridum)
Greata's aster (Symphyotrichum greatae)
Great Basin gilia (Aliciella leptomeria)
Great Basin wildrye (Elymus cinereus)
Great red paintbrush (Castilleja miniata ssp. miniata)
Great valley phacelia (Phacelia ciliata)
Greenbark ceanothus (Ceanothus spinosus)
Green bentgrass (Polypogon viridis)*
Green encelia (Encelia virginensis)
Green ephedra (Ephedra viridis)
Greene's dudleya (Dudleya greenei)
Green-gentian,
    Parry's (Frasera parryi)
    Pine (Frasera neglecta)
Greenleaf manzanita (Arctostaphylos patula)
Green miner's lettuce (Claytonia parviflora ssp. viridis)
Green rabbitbrush (Ericameria teretifolia)
Grinnell's penstemon (Penstemon grinnellii var. grinnellii)
Ground-cherry,
    Fendler's (Physalis hederifolia var. fendleri)
    Lobed (Physalis lobata)
    Thick-leaved (Physalis crasssifolia)
Groundcone, California (Boschniakia strobilacea)
Ground ivy (Glechoma hederacea)*
Ground pink (Linanthus dianthiflorus)
Groundsel,
    Broom (Senecio spartioides)
    California (Senecio californicus)
    Common (Senecio vulgaris)*
    Mono (Senecio flaccidus var. monoensis)
Groundsmoke,
    Pinegrove (Gayophytum oligospermum)
    Small-flowered (Gayophytum diffusum ssp. parviflorum)
    Zig-zag (Gayophytum heterozygum)
Guadalupe cryptantha (Cryptantha maritima)
Guayule (Parthenium argentatum)*
Gum-leaved brickellbush (Brickellia longifolia var. multiflora)
Gumplant,
    Coastal (Grindelia stricta var. platyphylla)
    Common (Grindelia camporum)
    Hairy (Grindelia hirsutula)
    San Diego (Grindelia hallii)
Gunsight fairyfan (Clarkia xantiana ssp. xantiana)
Gypsum-loving larkspur (Delphinium gypsophilum)
Gypsum spring beauty (Claytonia gypsophiloides)