Cupressaceae (Cypress):

Calocedrus decurrens (Incense-cedar)
Cupressus
    arizonica ssp. arizonica, see Hesperocyparis stephensonii
    forbesii, see Hesperocyparis forbesii
Hesperocyparis
    stephensonii (Cuyamaca cypress)
    forbesii (Tecate cypress)
Juniperus
    californica (California juniper)
    grandis (Grand juniper)
    occidentalis var. australis, see Juniperus grandis
    osteosperma (Utah juniper)
Sequoiadendron giganteum (Giant sequoia)*

Cyperaceae (Sedge):

Bolboschoenus maritimus ssp. paludosus (Marsh bulrush)
Carex
    alma (Sturdy sedge)
    aurea (Golden sedge)
    bolanderi (Bolander's sedge)
    densa (Dense)
    filifolia var. erostrata (Sagebrush sedge)
    fracta (Fragile-sheathed sedge)
    heteroneura (Smooth-fruited sedge)
    multicaulis (Forest sedge)
    pellita (Woolly sedge)
    praegracilis (Clustered field sedge)
    rossii (Ross's sedge)
    senta (Western rough sedge)
    spissa (San Diego sedge)
    subfusca (Rusty slender sedge)
    triquetra (Triangular-fruit sedge)
Cladium californicum (California sawgrass)
Cyperus
    eragrostis (Tall flat sedge)
    involucratus (Umbrella plant)*
    laevigatus (Smooth flatsedge)
Eleocharis
    acicularis var. acicularis (Needle spikerush)
    macrostachya (Common spikerush)
    montevidensis (Sand spikerush)
Schoenoplectus
    americanus (American bulrush)
    californicus (California bulrush)
Schoenus nigricans (Black sedge)
Scirpus
    americanus, see Schoenoplectus americanus
    californicus, see Schoenoplectus californicus
    maritimus, see Bolboschoenus maritimus
    microcarpus (Panicled bulrush)


Cystopteridaceae (Bladder fern):
   
Cystopteris fragilis (Brittle fern)


Datiscaceae (Datisca):

Datisca glomerata (Durango root)

Dennstaedtiaceae (Bracken):

Pteridium aquilinum var. pubescens (Bracken fern)


Dryopteridaceae (Wood fern):

Dryopteris arguta (Coastal wood fern)
Polystichum
    imbricans ssp. curtum (Cliff sword fern)
    munitum (Western sword fern)
    scopulinum (Mountain holly fern)


Ehretiaceae (Ehretia):

Tiquilia
    canescens (Woody crinklemat)
    nuttallii (Nuttall's crinklemat)
    palmeri (Palmer's crinklemat)
    plicata (Fanleaf crinklemat)

Elaeagnaceae (Oleaster):

Shepherdia argentea (Buffalo-berry)


Ephedraceae (Ephedra):

Ephedra
    aspera (Rough joint-fir)
    californica (California ephedra)
    nevadensis (Nevada ephedra)
    viridis (Green ephedra)

Equisetaceae (Horsetail):

Equisetum
    arvense (Common horsetail)
    hyemale ssp. affine (Common scouring rush)
    laevigatum (Smooth scouring rush)
    telmateia ssp. braunii (Giant horsetail)

Ericaceae (Heath):

Arbutus menziesii (Pacific madrone)
Arctostaphylos
    catalinae (Santa Catalina Island manzanita)
    confertiflora (Santa Rosa Island manzanita)
    gabrielensis, see Arctostaphylos glandulosa ssp. gabrielensis
    glandulosa ssp. adamsii (Adams' manzanita)
    glandulosa ssp. crassifolia (Del Mar manzanita)
    glandulosa ssp. gabrielensis (San Gabriel manzanita)
    glandulosa ssp. glandulosa (Eastwood manzanita)
    glandulosa ssp. glaucomollis, see Arctostaphylos glandulosa ssp. mollis
    glandulosa ssp. mollis (Transverse Range manzanita)
    glandulosa ssp. zacaensis, see Arctostaphylos glandulosa ssp. glandulosa
    glauca (Big-berry manzanita)
    insularis (Island manzanita)
    otayensis (Otay manzanita)
    parryana ssp. desertica (Desert manzanita)
    parryana ssp. parryana (Parry's manzanita)
    parryana ssp. tumescens (Interior manzanita)
    patula (Greenleaf manzanita)
    pringlei ssp. drupacea (Pink-bracted manzanita)
    pungens (Mexican manzanita)
    purissima (La purisima manzanita)
    rainbowensis (Rainbow manzanita)
    viridissima (McMinn's manzanita)
Chimaphila
    menziesii (Little prince's pine)
    umbellata (Pipsissewa)
Comarostaphylis
    diversifolia ssp. diversifolia (Varied-leaf summer-holly)
    diversifolia ssp. planifolia (Flat-leaf summer-holly)
Ornithostaphylos oppositifolia (Baja birdbush)
Orthilia secunda (One-sided wintergreen)
Phyllodoce breweri (Mountain heather)
Pterospora andromedea (Pinedrops)
Pyrola
    asarifolia ssp. asarifolia (Bog wintergreen)
    dentata (Toothed wintergreen)
    minor (Lesser wintergreen)
    picta (White-veined wintergreen)
Rhododendron occidentale (Western azalea)
Rhododendron sp. (Azalea)**
Sarcodes sanguinea (Snow plant)
Vaccinium ovatum (California huckleberry)
Xylococcus bicolor (Mission manzanita)

Euphorbiaceae (Spurge):

Acalypha californica (California copperleaf)
Bernardia incana (Bernardia)
Chamaesyce
    abramsiana, see Euphorbia ambramsiana
    albomarginata, see Euphorbia albomarginata
    arizonica, see Euphorbia arizonica
    melanadenia, see Euphorbia melanadenia
    micromera, see Euphorbia micromera
    ocellata ssp. arenicola, see Euphorbia ocellata ssp. arenicola
    parishii, see Euphorbia parishii
    parryi, see Euphorbia parryi
    pediculifera, see Euphorbia pediculifera
    polycarpa, see Euphorbia polycarpa
    prostrata, see Euphorbia prostrata
    serpyllifolia ssp. serpyllifolia, see Euphorbia serpyllifolia ssp. serpyllifolia
    setiloba, see Euphorbia setiloba
Croton
    californicus (California croton)
    setiger (Doveweed)
    wigginsii (Wiggins's croton)
Ditaxis
    lanceolata (Narrow-leaf ditaxis)
    neomexicana (New mexico ditaxis)
Eremocarpus setigerus, see Croton setiger
Euphorbia
    abramsiana (Abrams' spurge)
    albomarginata (Rattlesnake weed)
    arizonica (Arizona spurge)
    characias (Bush spurge)*
    eriantha (Beetle spurge)
    incisa, see Euphorbia schizoloba
    lathyris (Caper spurge)*
    lurida (Woodland spurge)
    melanadenia (Red-gland spurge)
    micromera (Sonoran spurge)
    misera (Cliff spurge)
    ocellata ssp. arenicola (Dune spurge)
    palmeri, see Euphorbia lurida
    parishii (Parish's spurge)
    parryi (Parry's spurge)
    pediculifera (Carrizo Mountain spurge)
    peplus (Petty spurge)*
    polycarpa (Small-seeded spurge)
    prostrata (Prostrate spurge)*
    schizoloba (Mojave spurge)
    serpyllifolia ssp. serpyllifolia (Thyme-leaved spurge)
    setiloba (Yuma spurge)
    spathulata (Warty spurge)
    terracina (Terracina spurge)*
Ricinus communis (Castor bean)*
Stillingia
    linearifolia (Narrow-leaved stillingia)
    spinulosa (Broad-leaved stillingia)
Tragia ramosa (Noseburn)

Fabaceae (Pea):

Acacia
    baileyana (Cootamundra watttle)*
    greggii, see Senegalia greggii
    longifolia (Golden wattle)*
Acmispon
    americanus var. americanus (Spanish clover)
    argophyllus var. adsurgens (San Clemente Island bird's-foot trefoil)
    argophyllus var. argophyllus (Silver lotus)
    argophyllus var. niveus (Santa Cruz Island bird's-foot trefoil)
    argyraeus var. argyraeus (Canyon bird's-foot trefoil)
    argyraeus var. multicaulis (Scrub lotus)
    brachycarpus (Hill lotus)
    dendroideus var. dendroideus (Island deerweed)
    dendroideus var. veatchii (San Miguel Island deerweed)
    denticulatus (River bar bird's-foot trefoil)
    glaber var. brevialatus (Short-winged deerweed)
    glaber var. glaber (Common deerweed)
    grandiflorus var. grandiflorus (Large-flowered lotus)
    haydonii (Pygmy lotus)
    heermannii var. heermannii (Heermann's lotus)
    maritimus var. brevivexillus (Short-bannered coastal lotus)
    maritimus var. maritimus (Coastal lotus)
    micranthus (Small-flowered lotus)
    nevadensis var. davidsonii (Davidson's lotus)
    nevadensis var. nevadensis (Sierra Nevada lotus)
    procumbens var. procumbens (Silky deerweed)
    rigidus (Desert rock pea)
    strigosus (Strigose lotus)
    wrangelianus (California lotus)
Amorpha
    californica var. californica (Californica false-indigo)
    fruticosa (Western false indigo)
Astragalus
    albens (Cushenbury milkvetch)
    allochrous var. playanus (Playa milkvetch)
    aridus (Annual desert milkvetch)
    bicristatus (Crested milkvetch)
    brauntonii (Braunton's rattleweed)
    calycosus var. calycosus (Torrey's milkvetch)
    cimae var. cimae (Cima milkvetch)
    cimae var. sufflatus (Inflated cima milkvetch)
    coccineus (Scarlet milkvetch)
    crotalariae (Salton milkvetch)
    curtipes (San Luis Obispo milkvetch)
    didymocarpus var. didymocarpus (Two-seeded milkvetch)
    didymocarpus var. dispermus (Dwarf white milkvetch)
    douglasii var. douglasii (Douglas's milkvetch)
    douglasii var. parishii (Parish's milkvetch)
    filipes (Narrowpod locoweed)
    gambelianus (Gambel's dwarf milkvetch)
    gilmanii (Gilman's milkvetch)
    layneae (Layne's locoweed)
    lentiginosus var. borreganus (Borrego milkvetch)
    lentiginosus var. fremontii (Fremont's milkvetch)
    lentiginosus var. micans (Shining milkvetch)
    lentiginosus var. semotus (White Mountains milkvetch)
    lentiginosus var. sierrae (Bear Valley milkvetch)
    lentiginosus var. variabilis (Varied milkvetch)
    leucolobus (Bear Valley woollypod)
    magdalenae var. peirsonii (Peirson's milkvetch)
    miguelensis (San Miguel milkvetch)
    minthorniae var. villosus (Minthorn's milkvetch)
    mohavensis var. mohavensis (Mojave milkvetch)
    newberryi var. newberryi (Newberry's rattleweed)
    nutans (Providence Mountains milkvetch)
    oophorus var. oophorus (Egg milkvetch)
    pachypus var. pachypus (Thickpod milkvetch)
    palmeri (Palmer's milkvetch)
    panamintensis (Panamint milkvetch)
    platytropis (Broad-keeled milkvetch)
    pomonensis (Pomona locoweed)
    preussii (Preuss's milkvetch)
    purshii var. lectulus (Pursh's milkvetch)
    purshii var. tinctus (Woollypod milkvetch)
    pycnostachyus var. lanosissimus (Ventura marsh milkvetch)
    sabulonum (Gravel milkvetch)
    serenoi var. shockleyi (Naked milkvetch)
    tidestromii (Astragalus tidestromii)
    tricarinatus (Triple-ribbed milkvetch)
    trichopodus var. lonchus (Coast locoweed)
    trichopodus var. phoxus (Santa Barbara milkvetch)
    whitneyi var. whitneyi (Whitney's locoweed)
Bituminaria bituminosa (Pitch trefoil)*
Caesalpinia
    gilliesii (Yellow bird-of-paradise)*
    virgata, see Hoffmanseggia microphylla
Calliandra eriophylla (Pink fairy duster)
Cercidium
    floridum ssp. floridum, see Parkinsonia florida
    microphyllum. see Parkinsonia microphylla
Cercis occidentalis (Western redbud)
Colutea arborescens (Bladder senna)*
Cytisus striatus (Portuguese broom)*
Dalea
    mollis (Silky dalea)
    mollissima (Downy dalea)
    searlsiae (Searls' prairie clover)
Genista
    linifolia (Mediterranean broom)*
    monspessulana (French broom)*
Glycyrrhiza lepidota (Wild licorice)
Hoffmannseggia
    glauca (Hog potato)
    microphylla (Hoffmannseggia)
Hoita
    macrostachya (Leather root)
    orbicularis (Roundleaf leather root)
Hosackia
    crassifolius var. crassifolius (Broad-leaved lotus)
    oblongifolia var. oblongifolia (Streambank lotus)
Lathyrus
    latifolius (Perennial sweet pea)*
    vestitus var. alefeldii (San Diego pea)
    vestitus var. vestitus (Canyon sweet pea)
Lotus  
    argophyllus var. adsurgens, see Acmispon argophyllus var. adsurgens
    argophyllus var. argophyllus, see Acmispon argophyllus var. argophyllus
    argophyllus var. niveus, see Acmispon argophyllus var. niveus
    argyraeus var. argyraeus, see Acmispon argyraeus var. argyraeus
    argyraeus var. multicaulis, see Acmispon argyraeus var. multicaulis
    corniculatus (Bird's-foot trefoil)*
    crassifolius var. crassifolius, see Hosackia crassifolia var. crassifolia
    dendroideus var. dendroideus, see Acmispon dendroideus var. dendroideus
    dendroideus var. veatchii, see Acmispon dendroideus var. veatchii
    denticulatus, see Acmispon denticulatus
    grandiflorus var. grandiflorus, see Acmispon grandiflorus var. grandiflorus
    hamatus, see Acmispon micranthus
    heermannii var. heermannii, see Acmispon heermannii var. heermannii
    humistratus, see Acmispon brachycarpus
    nevadensis var. davidsonii, see Acmispon nevadensis var. davidsonii
    nevadensis var. nevadensis, see Acmispon nevadensis var. nevadensis
    oblongifolius var. oblongifolius, see Hosackia oblongifolia var. oblongifolia
    procumbens var. procumbens, see Acmispon procumbens var. procumbens
    purshianus var. purshianus, see Acmispon americanus var. americanus
    rigidus, see Acmispon rigidus
    salsuginosus var. brevivexillus, see Acmispon maritimus var. brevivexillus
    salsuginosus var. salsuginosus, see Acmispon maritimus var. maritimus
    scoparius var. brevialatus, see Acmispon glaber var. brevialatus
    scoparius var. scoparius, see Acmispon glaber var. glaber
    strigosus, see Acmispon strigosus
    wrangelianus, see Acmispon wrangelianus
Lupinus
    adsurgens (Drew's silky lupine)
    albifrons var. albifrons (Silver bush lupine)
    albifrons var. douglasii (Douglas's silver bush lupine)
    andersonii (Anderson's lupine)
    arboreus (Coast bush lupine)
    arbustus (Long-spurred lupine)
    argenteus var. argenteus (Silvery lupine)
    arizonicus (Arizona lupine)
    benthamii (Bentham lupine)
    bicolor (Miniature lupine)
    brevicaulis (Sand lupine)
    breweri var. breweri (Brewer's lupine)
    breweri var. bryoides (Matted lupine)
    breweri var. grandiflorus (Showy Brewer's lupine)
    chamissonis (Dune lupine)
    concinnus (Bajada lupine)
    elatus (Silky lupine)
    albifrons var. austromontanus (Southern mountain lupine)
    albifrons var. hallii (Hall's bush lupine)
    albifrons var. johnstonii (Johnston's bush lupine)
    excubitus var. excubitus (Grape soda lupine)
    flavoculatus (Yellow-eyed lupine)
    formosus var. formosus (Summer lupine)
    hirsutissimus (Stinging lupine)
    hyacinthinus (San Jacinto lupine)
    latifolius var. latifolius (Broad-leaved lupine)
    latifolius var. parishii (Parish's lupine)
    lepidus var. confertus (Clustered tidy lupine)
    longifolius (Bush lupine)
    luteolus (Pale yellow lupine)
    luteus (European yellow lupine)*
    microcarpus var. densiflorus (White-whorled lupine)
    microcarpus var. horizontalis (Chick lupine)
    microcarpus var. microcarpus (Valley lupine)
    nanus (Sky lupine)
    odoratus (Royal desert lupine)
    peirsonii (Peirson's lupine)
    polyphyllus var. burkei (Meadow lupine)
    shockleyi (Desert lupine)
    sparsiflorus (Coulter's lupine)
    stiversii (Harlequin lupine)
    succulentus (Arroyo lupine)
    truncatus (Collar lupine)
Marina
    orcuttii var. orcuttii (California marina)
    parryi (Parry's marina)
Medicago
    lupulina (Black medick)*
    polymorpha (California bur-clover)*
    sativa (Alfalfa)*
Melilotus
    albus (White sweetclover)*
    indicus (Sourclover)*
    officinalis (Yellow sweetclover)*
Olneya tesota (Desert ironwood)
Oxytropis oreophila var. oreophila (Mountain oxytrope)
Paraserianthes lophantha (Plume acacia)*
Parkinsonia
    florida (Palo verde)
    microphylla (Littleleaf palo verde)
Pediomelum californicum (California breadroot)
Pickeringia
    montana var. montana (Chaparral pea)
    montana var. tomentosa (Woolly chaparral pea)
Prosopis
    glandulosa var. torreyana (Honey mesquite)
    pubescens (Screwbean mesquite)
Psorothamnus
    arborescens var. minutifolius (Little-leaved Mojave indigo bush)
    arborescens var. simplicifolius (California indigo bush)
    emoryi (Emory indigo bush)
    polydenius (Dotted indigo bush)
    schottii (Schott's indigo bush)
    spinosus (Smoke tree)
Robinia
    neomexicana (Desert locust)
    pseudoacacia (Black locust)*
Rupertia
    physodes (California tea)
    rigida (Parish's psoralea)
Senegalia
    greggii (Catclaw acacia)
Senna
    armata (Desert senna)
    artemisioides (Silver senna)*
    covesii (Coues' senna)
Spartium junceum (Spanish broom)*
Thermopsis
    californica var. argentata (Silvery false-lupine)
    californica var. semota (Velvety false-lupine)
    macrophylla var. argentata, see Thermopsis californica var. argentata
    macrophylla var. semota, see Thermopsis californica var. semota
Trifolium
    albopurpureum (Rancheria clover)
    barbigerum (Bearded clover)
    ciliolatum (Foothill clover)
    depauperatum var. truncatum (Balloon clover)
    gracilentum (Pin-point clover)
    hirtum (Rose clover)*
    longipes var. nevadense, see Trifolium longipes ssp. hansenii
    longipes ssp. hansenii (Summer clover)
    microcephalum (Small-head field clover)
    monanthum ssp. grantianum (Grant's carpet clover)
    obtusiflorum (Creek clover)
    pratense (Red clover)*
    repens (White clover)*
    variegatum (Whitetip clover)
    wildenovii (Tomcat clover)
    wormskioldii (Mountain clover)
Vachellia farnesiana var. farnesiana (Sweet acacia)*
Vicia
    americana ssp. americana (American vetch)
    hassei (Slender vetch)
    ludoviciana ssp. ludoviciana (Slim vetch) 
    sativa ssp. sativa (Spring vetch)*
    sativa ssp. nigra (Narrow-leaved vetch)*
    villosa ssp. varia (Smooth winter vetch)*
    villosa ssp. villosa (Hairy winter vetch)*

Fagaceae (Oak):

Chrysolepis sempervirens (Bush chinquapin)
Lithocarpus densiflorus var. densiflorus, see Notholithocarpus densiflorus var. densiflorus
Notholithocarpus densiflorus var. densiflorus (Tanbark oak)
Quercus
    acutidens (Torrey's scrub oak)
    agrifolia var. agrifolia (Coast live oak)
    agrifolia var. oxyadenia (Southern coast live oak)
    berberidifolia (Inland scrub oak)
    chrysolepis (Canyon live oak)
    cornelius-mulleri (Muller's oak)
    douglasii (Blue oak)
    dumosa (Coastal scrub oak)
    durata var. gabrielensis (San Gabriel Mountains leather oak)
    engelmannii (Engelmann oak)
    garryana var. breweri (Brewer's oak)
    john-tuckeri (Tucker's oak)
    kelloggii (California black oak)
    lobata (Valley oak)
    Xmorehus (Oracle oak)
    pacifica (Channel Island scrub oak)
    palmeri (Palmer's oak)
    tomentella (Island oak)
    turbinella (Shrub live oak)
    wislizeni var. frutescens (Shrubby interior live oak)
    wislizeni var. wislizeni (Interior live oak)

Fouquieriaceae (Ocotillo):

Fouquieria splendens ssp. splendens (Ocotillo)

Frankeniaceae (Frankenia):

Frankenia
    palmeri (Palmer's frankenia)
    salina (Alkali heath)

Garryaceae (Silktassel):

Garrya
    elliptica (Coast silktassel)
    flavescens (Ashy silktassel)
    fremontii (Fremont's silktassel)
    veatchii (Canyon silktassel)

Gentianaceae (Gentian):

Centaurium venustum, see Zeltnera venusta
Eustoma exaltatum ssp. exaltatum (Catchfly gentian)
Frasera
    neglecta (Pine green-gentian)
    parryi (Parry's green-gentian)
    puberulenta (Inyo frasera)
Gentiana fremontii (Moss gentian)
Gentianella amarella ssp. acuta (Autumn dwarf gentian)
Gentianopsis simplex (Hikers' gentian)
Swertia
    neglecta, see Frasera neglecta
    parryi, see Frasera parryi
    puberulenta, see Frasera puberulenta
Zeltnera venusta (Canchalagua)

Geraniaceae (Geranium):

Grossulariaceae (Gooseberry):

Ribes
    amarum (Bitter gooseberry)
    aureum var. gracillimum (Golden currant)
    californicum var. hesperium (Hillside gooseberry)
    cereum var. cereum (Wax currant)
    indecorum (White-flowering currant)
    malvaceum var. viridifolium (Chaparral currant)
    montigenum (Mountain gooseberry)
    nevadense (Mountain pink currant)
    quercetorum (Oak gooseberry)
    roezlii var. roezlii (Sierra gooseberry)
    speciosum (Fuchsia-flowered gooseberry)
    thacherianum (Santa Cruz Island gooseberry)
    velutinum (Desert gooseberry)
    viburnifolium (Evergreen currant)