Cupressaceae (Cypress):

Calocedrus decurrens (Incense-cedar)
Cupressus
    arizonica ssp. arizonica (Cuyamaca cypress)
    forbesii (Tecate cypress)
Juniperus
    californica (California juniper)
    occidentalis var. australis (Western juniper)
    osteosperma (Utah juniper)

Cuscutaceae (Dodder):

Cuscuta
    californica var. breviflora (Short-flowered California dodder)
    californica var. californica (California dodder)
    californica var. papillosa (Papillate dodder)
    denticulata (Desert dodder)
    pentagona (Western field dodder)
    salina var. major (Salt marsh dodder)
    subinclusa (Canyon dodder)

Cyperaceae (Sedge):

Bolboschoenus maritimus (Marsh bulrush)
Carex
    alma (Sturdy sedge)
    densa (Dense)
    fracta (Fragile-sheathed sedge)
    multicaulis (Forest sedge)
    praegracilis (Clustered field sedge)
    senta (Swamp sedge)
    spissa (San Diego sedge)
    subfusca (Rusty slender sedge)
    triquetra (Triangular-fruit sedge)
Cyperus
    eragrostis (Tall flat sedge)
    involucratus (Umbrella plant)*
Eleocharis
    acicularis var. acicularis (Needle spikerush)
    macrostachya (Common spikerush)
    montevidensis (Sand spikerush)
Schoenoplectus
    americanus (American bulrush)
    californicus (California bulrush)
Scirpus, now divided up into families Bolboschoenus, Isolepis, Scirpus, Schoenoplectus and Trichophorum
   

Datiscaceae (Datisca):

Datisca glomerata (Durango root)

Dennstaedtiaceae (Bracken):

Pteridium aquilinum var. pubescens (Bracken fern)


Dryopteridaceae (Wood fern):

Athyrium filix-femina var. cyclosorum (Lady fern)
Cystopteris fragilis (Brittle fern)
Dryopteris arguta (Coastal wood fern)
Polystichum
    imbricans ssp. curtum (Cliff sword fern)
    munitum (Western sword fern)
    scopulinum (Mountain holly fern)
Woodsia oregana (Oregon cliff fern)

Elaeagnaceae (Oleaster):

Shepherdia argentea (Buffalo-berry)


Ephedraceae (Ephedra):

Ephedra
    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 (San Gabriel manzanita)
    glandulosa ssp. adamsii (Adams' manzanita)
    glandulosa ssp. crassifolia (Del Mar manzanita)
    glandulosa ssp. glaucomollis (Eastwood manzanita)
    glandulosa ssp. mollis (Santa Monica Mountains manzanita)
    glandulosa ssp. zacaensis (Zaca Lake manzanita)
    glauca (Bigberry manzanita)
    insularis (Island manzanita)
    otayensis (Otay manzanita)
    parryana ssp. deserticum (Parry's manzanita)
    parryana ssp. parryana (Parry's manzanita)
    patula (Greenleaf manzanita)
    peninsularis (Peninsular manzanita)
    pringlei ssp. drupacea (Pink-bracted manzanita)
    pungens (Mexican manzanita)
    tomentosa (Woollyleaf manzanita)
Chimaphila menziesii (Little prince's pine)
Comarostaphylis
    diversifolia ssp. diversifolia (Summer-holly)
    diversifolia ssp. planifolia (Summer-holly)
Ornithostaphylos oppositifolia (Baja birdbush)
Phyllodoce breweri (Mountain heather)
Pterospora andromedea (Pinedrops)
Pyrola
    asarifolia ssp. asarifolia (Bog 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 myricifolia (Bernardia)
Chamaesyce
    albomarginata (Rattlesnake weed)
    arizonica (Arizona spurge)
    melanadenia (Red-gland spurge)
    micromera (Sonoran spurge)
    ocellata ssp. arenicola (Dune spurge)
    parryi (Parry's spurge)
    polycarpa (Small-seeded spurge)
    prostrata (Prostrate spurge)*
    serpyllifolia ssp. serpyllifolia (Thyme-leaved spurge)
    setiloba (Yuma spurge)
Croton
    californicus (California croton)
    wigginsii (Wiggins's croton)
Ditaxis
    lanceolata (Narrow-leaf ditaxis)
    neomexicana (New mexico ditaxis)
Eremocarpus setigerus (Doveweed)
Euphorbia
    characias (Bush spurge)*
    crenulata (Chinese caps)
    eriantha (Beetle spurge)
    incisa (Mojave spurge)
    lathyris (Caper spurge)*
    misera (Cliff spurge)
    palmeri (Woodland spurge)
    peplus (Petty spurge)*
    spathulata (Warty spurge)
    terracina (Terracina spurge)*
Ricinus communis (Castor bean)*
Stillingia
    linearifolia (Narrow-leaved stillingia)
    spinulosa (Broad-leaved stillingia)
Tetracoccus
    dioicus (Parry's tetracoccus)
    hallii (Hall's purple bush)
Tragia ramosa (Noseburn)

Fabaceae (Pea):

Acacia
    farnesiana var. farnesiana (Sweet acacia)*
    greggii (Catclaw acacia)
    baileyana (Cootamundra watttle)*
    longifolia (Golden wattle)*
Albizia lophantha (Plume acacia)*
Amorpha
    californica var. californica (Californica false-indigo)
    fruticosa (Western false indigo)
Astragalus
    albens (Cushenbury milkvetch)
    aridus (Annual desert milkvetch)
    bicristatus (Crested milkvetch)
    brauntonii (Braunton's rattleweed)
    cimae var. cimae (Cima milkvetch)
    coccineus (Scarlet milkvetch)
    crotalariae (Salton milkvetch)
    curtipes (San Luis Obispo milkvetch)
    didymocarpus var. dispermus (Dwarf white milkvetch)
    douglasii var. douglasii (Jacumba milkvetch)
    douglasii var. parishii (Parish's jacumba 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. 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)
    newberryi var. newberryi (Newberry's rattleweed)
    pachypus (Sheep's locoweed)
    palmeri (Palmer's milkvetch)
    panamintensis (Panamint milkvetch)
    pomonensis (Pomona locoweed)
    purshii var. lectulus (Pursh's milkvetch)
    purshii var. tinctus (Pursh's 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 (Hoffmanseggia)
Calliandra
    eriophylla (Pink fairy duster)
Cercidium
    floridum ssp. floridum (Palo verde)
    microphyllum (Littleleaf palo verde)
Cercis occidentalis (Western redbud)
Colutea arborescens (Bladder senna)*
Cytisus striatus (Portuguese broom)*
Genista
    linifolia (Mediterranean broom)*
    monspessulana (French broom)*
Dalea
    mollis (Silky dalea)
    mollissima (Downy dalea)
Glycyrrhiza lepidota (Wild licorice)
Hoita
    macrostachya (Leather root)
    orbicularis (Roundleaf leather root)
Lathyrus
    latifolius (Perennial sweet pea)*
    vestitus var. alefeldii (San Diego pea)
    vestitus var. vestitus (Canyon sweet pea)
Lotus
    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)
    corniculatus (Bird's-foot trefoil)*
    crassifolius var. crassifolius (Broad-leaved lotus)
    dendroideus var. dendroideus (Island deerweed)
    dendroideus var. veatchii (San Miguel Island deerweed)
    denticulatus (River bar bird's-foot trefoil)
    grandiflorus var. grandiflorus (Large-flowered lotus)
    hamatus (Small-flowered lotus)
    heermannii var. heermannii (Heermann's lotus)
    humistratus (Hill lotus)
    nevadensis var. davidsonii (Davidson's lotus)
    nevadensis var. nevadensis (Sierra Nevada lotus)
    oblongifolius var. oblongifolius (Streambank lotus)
    purshianus var. purshianus (Spanish clover)
    rigidus (Desert rock pea)
    salsuginosus var. brevivexillus (Short-bannered coastal lotus)
    salsuginosus var. salsuginosus (Coastal lotus)
    scoparius var. brevialatus (Short-winged deerweed)
    scoparius var. scoparius (Common deerweed)
    strigosus (Strigose lotus)
    strigosus [var. tomentellus] (Desert strigose lotus)
    wrangelianus (California lotus)
Lupinus
    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)
    breweri var. breweri (Brewer's lupine)
    breweri var. grandiflorus (Showy Brewer's lupine)
    chamissonis (Dune lupine)
    concinnus (Bajada lupine)
    elatus (Silky lupine)
    excubitus var. austromontanus (Southern mountain lupine)
    excubitus var. excubitus (Grape soda lupine)
    excubitus var. hallii (Hall's bush lupine)
    excubitus var. johnstonii (Johnston's bush 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. microcarpus (Valley lupine)
    nanus (Sky lupine)
    odoratus (Royal desert lupine)
    polyphyllus var. burkei (Meadow lupine)
    shockleyi (Desert lupine)
    sparsiflorus (Coulter's lupine)
    succulentus (Arroyo lupine)
    truncatus (Collar lupine)
Marina
    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 (Mountain oxytrope)
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 pseudoacacia (Black locust)*
Rupertia
    physodes (California tea)
    rigida (Parish's psoralea)
Senna
    armata (Desert senna)
    covesii (Coues' senna)
Spartium junceum (Spanish broom)*
Tauschia arguta (Southern tauschia)
Thermopsis
    macrophylla var. argentata (Silvery false-lupine)
    macrophylla var. semota (Velvety false-lupine)
Trifolium
    albopurpureum var. albopurpureum (Indian clover)
    barbigerum (Bearded clover)
    ciliolatum (Tree clover)
    depauperatum var. truncatum (Balloon clover)
    gracilentum var. gracilentum (Pin-point clover)
    hirtum (Rose clover)*
    longipes (Summer clover)
    microcephalum (Small-head field clover)
    monanthum var. grantianum (Grant's carpet clover)
    monanthum var. monanthum (Mountain carpet clover)
    obtusiflorum (Creek clover)
    pratense (Red clover)*
    repens (White clover)*
    variegatum (Whitetip clover)
    wildenovii (Tomcat clover)
    wormskioldii (Mountain clover)
Vicia
    americana var. americana (American vetch)
    hassei (Slender vetch)
    ludoviciana var. ludoviciana (Slim vetch) 
    sativa (Spring vetch)*
    villosa (Winter vetch)*

Fagaceae (Oak):

Chrysolepis sempervirens (Bush chinquapin)
Lithocarpus 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 (Desert scrub oak)
    kelloggii (California black 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 var. splendens (Ocotillo)
Idria columnaris (Boojum tree)

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 (Canchalagua)
Eustoma exaltatum (Catchfly gentian)
Gentianella amarella ssp. acuta (Autumn dwarf gentian)
Gentianopsis simplex (One flower fringed gentian)
Swertia
    neglecta (Pine green-gentian)
    parryi (Parry's green-gentian)

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)
    lasianthum (Alpine gooseberry)
    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)