Orobanchaceae (Broomrape):

Aphyllon
    californicum ssp. feudgei (California broomrape)
    cooperi (Cooper's broomrape)
    corymbosum (Flat-topped broomrape)
    franciscanum (Franciscan broomrape)
    parishii ssp. brachylobum (Short-lobed broomrape)
    parishii ssp. parishii (Parish's broomrape)
    purpureum (Naked broomrape)
    tuberosum (Chaparral broomrape)
    validum (Rock Creek broomrape)
    vallicolum (Valley broomrape)
Boschniakia strobilacea, see Kopsiopsis strobilacea
Castilleja
    affinis ssp. affinis (Coast paintbrush)
    angustifolia, see Castilleja chromosa
    applegatei ssp. martinii (Martin's paintbrush)
    chromosa (Desert paintbrush)
    cinerea (Ashy-gray paintbrush)
    densiflora ssp. gracilis (Dense-flowered owl's clover)
    exserta ssp. exserta (Purple owl's clover)
    exserta ssp. venusta (Mojave owl's clover)
    foliolosa (Woolly paintbrush)
    gleasoni (Mount Gleason paintbrush)
    hololeuca (Island paintbrush)
    lanata ssp. hololeuca, see Castilleja hololeuca
    lasiorhyncha (San Bernardino Mountains owl's clover)
    linariifolia (Narrow-leaved paintbrush)
    miniata ssp. miniata (Great red paintbrush)
    minor ssp. spiralis (Lesser paintbrush)
    mollis (Soft-leaved paintbrush)
    montigena (Heckard's paintbrush)
    nana (Dwarf alpine paintbrush)
    plagiotoma (Yellow paintbrush)
    subinclusa ssp. subinclusa (Longleaf paintbrush)
    tenuis (Hairy owl's clover)
Chloropyron
    maritimum ssp. maritimum (Salt marsh bird's beak)
    tecopense (Tecopa bird's beak)
Cordylanthus
    maritimus ssp. maritimus, see Chloropyron maritimum ssp. maritimum
    nevinii (Nevin's bird's beak)
    orcuttianus, see Dicranostegia orcuttiana
    parviflorus (Purple bird's beak)
    rigidus ssp. rigidus (Stiffbranch bird's beak)
    rigidus ssp. setiger (Bristly bird's beak)
Dicranostegia  orcuttiana (Orcutt's bird's beak)
Kopsiopsis strobilacea (California groundcone)
Orobanche, see Aphyllon
Pedicularis
    attollens (Little elephant heads)
    densiflora (Warrior's plume)
    semibarbata (Pine lousewort)

Oxalidaceae (Oxalis):

Oxalis
    albicans ssp. californica, see Oxalis californica
    albicans ssp. pilosa, see Oxalis pilosa
    californica (California oxalis)
    corniculata (Creeping wood-sorrel)*
    pes-caprae (Bermuda buttercup)*
    pilosa (Wild oxalis)

Paeoniaceae (Peony):

Paeonia californica (Wild peony)

Papaveraceae (Poppy):

Arctomecon merriamii (Bear poppy)
Argemone
    corymbosa (Mojave prickly poppy)
    munita (Chicalote)
Canbya candida (Pygmy poppy)
Dendromecon
    hardfordii (Channel Island tree poppy)
    rigida (Bush poppy)
Dicentra
    chrysantha, see Ehrendorferia chrysantha
    ochroleuca, see Ehrendorferia ochroleuca
Ehrendorferia
    chrysantha (Golden eardrops)
    ochroleuca (Bleeding hearts)
Eschscholzia
    caespitosa (Tufted poppy)
    californica (California poppy)
    glyptosperma (Desert gold poppy)
    lemmonii ssp. kernensis (Tejon poppy)
    minutiflora (Little gold poppy)
    parishii (Parish's poppy)
Meconella denticulata (Small-flowered meconella)
Papaver
    californicum (Fire poppy)
    heterophyllum (Wind poppy)
Platystemon californicus (Cream cups)
Romneya
    coulteri (Matilija poppy)
    trichocalyx (Bristly matilija poppy)
Stylomecon heterophylla, see Papaver heterophyllum


Parnassiaceae (Parnassus):

Parnassia
    californica, see Parnassia palustris
    palustris (Grass-of-parnassus)


Phrymaceae (Lopseed):

Diplacus
    aridus (Low bush monkeyflower)
    australis (Southern bush monkeyflower)
    bigelovii var. bigelovii(Bigelow's monkeyflower)
    bigelovii var. cuspidatus(Northern desert monkeyflower)
    bolanderi (Bolander's monkeyflower)
    brevipes (Yellow monkeyflower)
    calycinus (Southern Sierra bush monkeyflower)
    clevelandii(Cleveland's bush monkeyflower)
    congdonii (Congdon's monkeyflower)
    constrictus (Dense-fruited monkeyflower)
    fremontii (Fremont's monkeyflower)
    johnstonii (Johnston's monkeyflower)
    longiflorus (Hairy bush monkeyflower)
    parviflorus (Island bush monkeyflower)
    pictus (Calico monkeyflower)
    puniceus (Red bush monkeyflower)
    rupicola (Death Valley monkeyflower)
Erythranthe
    androsacea (Rock-jasmine monkeyflower)
    breweri (Brewer's monkeyflower)
    calcicola (Limestone monkeyflower)
    cardinalis (Scarlet monkeyflower)
    exigua (San Bernardino Mountains monkeyflower)
    floribunda (Many-flowered monkeyflower)
    geniculata (Bent-stem monkeyflower)
    guttata (Creek monkeyflower)
    inconspicua (Smallflower monkeyflower)
    moschata (Musk monkeyflower)
    nasuta (Large-nosed monkeyflower)
    palmeri (Palmer's monkeyflower)
    parishii (Parish's monkeyflower)
    primuloides (Primrose monkeyflower)
    purpurea (Purple monkeyflower)
    rhodopetra (Red Rock Canyon monkeyflower)
    rubella (Red-stemmed monkeyflower)
    shevockii (Kelso Creek monkeyflower)
    sierrae (Sierra Nevada monkeyflower)
    suksdorfii (Suksdorf's monkeyflower)
    tilingii (Tiling's monkeyflower)
Mimetanthe pilosa (Downy monkeyflower)
Mimulus,
    androsaceus, see Erythranthe androsaceus
    aridus, see Diplacus aridus
    aurantiacus var. puniceus, see Diplacus puniceus
    bigelovii var. bigelovii, see Diplacus bigelovii var. bigelovii
    bigelovii var. cuspidatus, see Diplacus bigelovii var. cuspidatus
    bolanderi, see Diplacus bolanderi
    brevipes, see Diplacus brevipes
    breweri, Erythranthe breweri
    cardinalis, see Erythranthe cardinalis
    clevelandii, see Diplacus clevelandii
    congdonii, see Diplacus congdonii
    constrictus, see Diplacus constrictus
    exiguus, see Erythranthe exigua
    flemingii, see Diplacus parviflorus
    floribundus, see Erythranthe floribunda
    fremontii, see Diplacus fremontii
    geniculatus, see Erythranthe geniculata
    guttatus, see Erythranthe guttata
    inconspicuus, see Erythranthe inconspicua
    johnstonii, see Diplacus johnstonii
    longiflorus, see Diplacus longiflorus
    longiflorus ssp. calycinus, see Diplacus calycinus
    moschatus, see Erythrina inodora
    palmeri, see Erythranthe palmeri
    parishii, see Erythranthe parishii
    pictus, see Diplacus pictus
    pilosa, Mimetanthe pilosa
    primuloides, see Diplacus primuloides
    purpureus, see Erythranthe purpurea
    rubellus, see Erythranthe rubella
    rupicola, see Diplacus rupicola
    shevockii, see Erythranthe shevockii
    suksdorfii, see Erythranthe suksdorfii
    tilingii, see Erythranthe tilingii


Phytolaccaceae (Pokeweed):

Phytolacca americana (Pokeweed)*


Picrodendraceae (Bitter-tree):

Tetracoccus
    dioicus (Parry's tetracoccus)
    hallii (Hall's tetracoccus)
    ilicifolius (Holly-leaved tetracoccus)

Pinaceae (Pine):

Abies concolor (White fir)
Pinus
    attenuata (Knobcone pine)
    contorta ssp. murrayana (Lodgepole pine)
    coulteri (Coulter pine)
    flexilis (Limber pine)
    halepensis (Aleppo pine)*
    jeffreyi (Jeffrey pine)
    lambertiana (Sugar pine)
    longaeva (Bristlecone pine)
    monophylla (Singleleaf pinyon pine)
    muricata (Bishop pine)
    ponderosa var. pacifica (Yellow pine)
    quadrifolia (Four-needle pinyon pine)
    sabiniana (Gray pine)
    torreyana ssp. insularis (Santa Rosa Island torrey pine)
    torreyana ssp. torreyana (Torrey pine)
Pseudotsuga macrocarpa (Big-cone douglas fir)

Plantaginaceae (Plantain):

Antirrhinum
    confertiflorum (Ghost flower)
    coulterianum (White snapdragon)
    filipes (Desert twining snapdragon)
    kelloggii (Twining snapdragon)
    mohavea (Lesser mohavea)
    multiflorum, see Antirrhinum thompsonii
    nuttallianum ssp. nuttallianum (Violet snapdragon)
    thompsonii (Rose snapdragon)
Callitriche
    heterophylla var. bolanderi (Water-starwort)
    palustris (Vernal water-starwort)
Collinsia
    bartsiifolia var. davidsonii (Davidson's blue-eyed mary)
    callosa (Desert collinsia)
    childii (Child's collinsia)
    concolor (Southern Chinese houses)
    heterophylla var. austromontana (Downy Chinese houses)
    heterophylla var. heterophylla (Chinese houses)
    parryi (Parry's collinsia)
    parviflora (Small-flowered collinsia)
    tinctoria (Sticky Chinese houses)
    torreyi var. wrightii (Wright's collinsia)
Digitalis purpurea (Foxglove)*
Gambelia speciosa (Showy island snapdragon)
Holmgrenanthe petrophila (Rock lady)
Keckiella
    antirrhinoides var. antirrhinoides (Yellow penstemon)
    antirrhinoides var. microphylla (Little-leaved yellow penstemon)
    breviflora var. breviflora (Gaping penstemon)
    cordifolia (Heartleaf penstemon)
    rothrockii var. jacintensis (San Jacinto Mountains keckiella)
    rothrockii var. rothrockii (Rothrock's keckiella)
    ternata var. septentrionalis (Northern blue-stemmed keckiella)
    ternata var. ternata (Whorl-leaf penstemon)
Kickxia elatine (Sharpleaf cancerwort)*
Linaria
    canadensis var. texana, see Nuttallanthus texanus
    dalmatica ssp. dalmatica (Dalmatian toadflax)*
Maurandella antirrhiniflora (Violet twining snapdragon)
Maurandya antirrhiniflora ssp. antirrhiniflora, see Maurandella antirrhiniflora
Mohavea
    breviflora, see Antirrhinum mohavea
    confertiflora, see Antirrhinum confertiflorum
Nuttalanthus texanus (Blue toadflax)
Penstemon
    caesius (San Bernardino beardtongue)
    calcareus (Limestone beardtongue)
    californicus (California beardtongue)
    centranthifolius (Scarlet bugler)
    clevelandii var. clevelandii (Cleveland's beardtongue)
    clevelandii var. connatus (San Jacinto beardtongue)
    clevelandii var. mohavensis (Mojave beardtongue)
    Xdubius (Doubtful penstemon)
    eatonii var. undosus (Firecracker penstemon)
    floridus var. austinii (Austin's beardtongue)
    fruticiformis var. fruticiformis (Desert beardtongue)
    grinnellii var. grinnellii (Grinnell's penstemon)
    grinnellii var. scrophularioides (Northern Grinnell's penstemon)
    heterophyllus var. australis (Southern foothill penstemon)
    heterophyllus var. heterophyllus (Foothill penstemon)
    labrosus (San Gabriel beardtongue)
    laetus var. laetus (Mountain blue penstemon)
    newberryi var. newberryi (Pride of the mountains)
    palmeri var. palmeri (Palmer's penstemon)
    pseudospectabilis (Desert penstemon)
    rostriflorus (Beaked penstemon)
    speciosus (Royal penstemon)
    spectabilis var. spectabilis (Smooth showy penstemon)
    spectabilis var. subviscosus (Glandular showy penstemon)
    stephensii (Stephens' beardtongue)
    thompsoniae (Thompson's beardtongue)
    thurberi (Thurber's penstemon)
    utahensis (Utah penstemon)
Plantago
    arenaria (Sand plantain)*
    coronopus (Cut-leaf plantain)*
    elongata (Longleaf plantain)
    erecta (California plantain)
    lanceolata (English plantain)*
    major (Broad-leaf plantain)*
    ovata var. fastigiata (Woolly plantain)
    patagonica (Patagonia plantain)
Veronica
    americama (American speedwell)
    anagallis-aquatica (Water speedwell)*
    arvensis (Corn speedwell)*
    peregrina ssp. xalapensis (Purslane speedwell)
    persica (Persian speedwell)*
    serpyllifolia ssp. humifusa (Thyme-leaved speedwell)*

Platanaceae (Sycamore):

Platanus racemosa (Western sycamore)

Plumbaginaceae (Leadwort):

Armeria maritima ssp. californica (California sea-pink)
Limonium  
    californicum (Sea-lavender)
    sinuatum (Statice)*


Poaceae (Grass):

Achnatherum
    aridum. see Stipa arida
    coronatum, see Stipa coronata
    diegoense, see Stipa diegoensis
    hymenoides, see Stipa hymenoides
    occidentale var. occidentale, see Stipa occidentalis var. occidentalis
    parishii, see Stipa parishii var. parishii
    speciosum, see Stipa speciosa
Aegilops cylindrica (Jointed goatgrass)*
Agropyron
    cristatum ssp. pectinatum (Desert crested wheat grass)*
    desertorum, see cristatum ssp. pectinatum
Agrostis
    idahoensis (Idaho bentgrass)
    pallens (Seashore bentgrass)
    viridis, see Polypogon viridis
Alopecurus aequalis var. aequalis (Shortawn foxtail)
Andropogon glomeratus var. scabriglumis (Southwestern bushy bluestem)
Aristida
    adscensionis (Three-awn)
    purpurea var. nealleyi (Nealley three-awn)
Arundo donax (Giant reed)*
Avena
    barbata (Slender oats)*
    fatua (Common wild oats)*
Bothriochloa barbinodis (Cane beardgrass)
Bouteloua
    aristidoides var. aristodoides (Needle grama)
    curtipendula (Side-oats grama)
    eriopoda (Black grama)
    gracilis (Blue grama)
    trifida (Red grama)
Brachypodium distachyon (Purple false-brome)*
Bromus
    berteroanus (Chilean chess)
    carinatus var. carinatus, see Bromus sitchensis var. carinatus
    carinatus var. marginatus, see Bromus sitchensis var. marginatus
    carinatus var. maritimus, see Bromus sitchensis var. maritimus
    diandrus (Ripgut brome)*
    hallii (Hall's brome)
    hordeaceus (Soft chess)*
    rubens (Red brome)*
    sitchensis var. carinatus (California brome)
    sitchensis var. marginatus (Mountain brome)
    sitchensis var. maritimus (Seaside brome)
    tectorum (Cheat grass)*
    trinii, see Bromus berteroanus
Calamagrostis purpurascens (Purple reedgrass)
Cortaderia selloana (Pampas grass)*
Cynodon dactylon (Bermuda grass)*
Dactylis glomerata (Orchard grass)*
Dasyochloa pulchella (Fluff grass)
Deschampsia elongata (Slender hairgrass)
Distichlis
    littoralis (Shore grass)
    spicata (Salt grass)
Elymus
    cinereus (Great Basin wildrye)
    condensatus (Giant wildrye)
    elymoides ssp. brevifolius (Short-leaved squirreltail)
    elymoides ssp. californicus (California squirreltail)
    glaucus ssp. glaucus (Blue wildrye)
    hispidus (Intermediate wheat grass)*
    pacificus (Pacific wildrye)
    ponticus (Tall wheat grass)*
    trachycaulus ssp. trachycaulus (Slender wheat grass)
    triticoides (Creeping wildrye)
Elytrigia
    intermedia ssp. intermedia, see Elymus hispidus
    pontica ssp. pontica, see Elymus ponticus
Eragrostis curvula (Weeping love grass)
Erioneuron pulchellum, see Dasyochloa pulchella
Festuca
    arundinacea (Tall fescue)*
    kingii (Spike fescue)
    microstachys (Small fescue)
    myuros (Rattail fescue)*
    octoflora (Six-weeks grass)
    perennis (Ryegrass)*
    rubra (Red fescue)
    temulenta (Darnel)*
Gastridium
    phleoides (Nit grass)*
    ventricosum, see Gastridium phleoides
Glyceria elata (Fowl mannagrass)
Hilaria rigida (Big galleta grass)
Hordeum
    brachyantherum ssp. californicum (Meadow barley)
    intercedens (Bobtail barley)
    murinum ssp. glaucum (Foxtail barley)*
    murinum ssp. leporinum (Hare barley)*
Imperata brevifolia (California satintail)
Koeleria macrantha (Junegrass)
Lamarckia aurea (Goldentop grass)
Leymus
    cinereus, see Elymus cinereus
    condensatus, see Elymus condensatus
    pacificus, see Elymus pacificus
Lolium
    multiflorum, see Festuca perennis
    temulentum, see Festuca temulenta
Melica
    frutescens (Tall melica)
    imperfecta (Coast range melic)
    stricta (Rock melic)
Monanthochloe littoralis, see Distichlis littoralis
Muhlenbergia
    filiformis (Pullup muhly)
    porteri (Bush muhly)
    richardsonis (Mat muhly)
    rigens (Deergrass)
Nassella
    cernua, see Stipa cernua
    lepida, see Stipa lepida
    pulchra, see Stipa pulchra
Panicum urvilleanum (Desert panic grass)
Parapholis incurva (Curved sicklegrass)*
Paspalum
    dilatatum (Dallis grass)*
    distichum (Knot grass)
Pennisetum
    clandestinum (Kikuyu grass)*
    setaceum (Fountaingrass)*
Phalaris aquatica (Harding grass)*
Phleum alpinum (Mountain timothy)
Phragmites australis (Common reed)
Piptatherum miliaceum, see Stipa miliacea
Pleuraphis rigida, see Hilaria rigida
Poa
    atropurpurea (San Bernardino bluegrass)
    bulbosa ssp. vivipara (Bulbous bluegrass)*
    douglasii (Sand-dune bluegrass)
    fendleriana ssp. longiligula (Fendler's bluegrass)
    infirma (Weak bluegrass)*
    pratensis ssp. pratensis (Kentucky bluegrass)*
    secunda ssp. juncifolia (Rush bluegrass)
    secunda ssp. secunda (One-sided bluegrass)
Polypogon
    interruptus (Ditch beard grass)*
    monspeliensis (Rabbitsfoot grass)*
    viridis (Green bentgrass)*
Schismus barbatus (Common Mediterranean grass)*
Secale cereale (Cereal rye)*
Spartina foliosa (Cord grass)
Sporobolus airoides (Alkali sacaton)
Stipa
    arida (Mormon needlegrass)
    cernua (Nodding needlegrass)
    comata var. comata (Needle-and-thread)
    coronata (Giant stipa)
    diegoensis (San Diego County needlegrass)
    hymenoides (Sand ricegrass)
    lepida (Foothill needlegrass)
    miliacea var. miliacea (Smilo grass)*
    occidentalis var. occidentalis (Western needlegrass)
    parishii var. parishii (Parish's needlegrass)
    pulchra (Purple needlegrass)
    speciosa (Desert needlegrass)
Swallenia alexandrae (Eureka Valley dune grass)
Tridens muticus (Slim tridens)
Trisetum spicatum (Narrow oatgrass)
Triticum aestivum (Common wheat)*
Vulpia
    microstachys, see Festuca microstachys
    myuros var. hirsuta, see Festuca myuros
    octoflora var. hirtella, see Festuca octoflora
    octoflora var. octoflora, see Festuca octoflora

Polemoniaceae (Phlox):

Aliciella
    hutchinsifolia (Desert pale gilia)
    latifolia ssp. latifolia (Broad-leaf gilia)
    leptomeria (Great Basin gilia)
    ripleyi (Ripley's aliciella)
    triodon (Sand gilia)
Allophyllum
    divaricatum (Purple false-gilia)
    gilioides ssp. gilioides (Dense false-gilia)
    gilioides ssp. violaceum (Violet false-gilia)
    glutinosum (Sticky false-gilia)
    integrifolium (White false-gilia)
Collomia
    grandiflora (Large-flowered collomia)
    linearis (Slenderleaf collomia)
Eriastrum
    densifolium ssp. austromontanum (Southern mountain woolstar)
    densifolium ssp. elongatum (Giant woolstar)
    densifolium ssp. mohavense (Mojave woolstar)
    densifolium ssp. sanctorum (Santa Ana River woolstar)
    diffusum (Miniature woolstar)
    eremicum ssp. eremicum (Desert woolstar)
    harwoodii (Harwood's woolstar)
    sapphirinum ssp. dasyanthum (Shaggy-flowered woolstar)
    sapphirinum ssp. sappirinum (Sapphire woolstar)
    signatum (Maroon-spotted woolstar)
    sparsiflorum (Few-flowered woolstar)
    tracyi (Tracy's woolstar)
    wilcoxii (Wilcox's woolstar)
Gilia
    aliquanta ssp. aliquanta (Puff-calyx gilia)
    aliquanta ssp. breviloba (Western gilia)
    angelensis (Chaparral gilia)
    australis, see Saltugilia australis
    brecciarum ssp. brecciarum (Nevada gilia)
    brecciarum ssp. neglecta (Argus gilia)
    campanulata, see Linanthus campanulatus
    cana ssp. bernardina (San Bernardino showy gilia)
    cana ssp. speciformis (Showy gilia)
    cana ssp. triceps (Three-headed showy gilia)
    capitata ssp. abrotanifolia (Globe gilia)
    caruifolia, see Saltugilia caruifolia
    clokeyi (Clokey's gilia)
    diegensis (San Diego gilia)
    filiformis, see Linanthus filiformis
    hutchinsifolia, see Aliciella hutchinsifolia
    jacens (Decumbent gilia)
    latiflora ssp. cuyamensis (Cuyama gilia)
    latiflora ssp. davyi (Davy gilia)
    latiflora ssp. latiflora (Broad-flowered gilia)
    latifolia, see Aliciella latifolia ssp. latifolia
    leptantha ssp. leptantha (Fine-flower gilia)
    leptantha ssp. purpusii (Purpus's gilia)
    leptantha ssp. transversa (Transverse fine-flower gilia)
    maculata, see Linanthus maculatus
    mexicana (El Paso gilia)
    minor (Little gilia)
    modocensis (Modoc gilia)
    ochroleuca ssp. bizonata (Banded volcanic gilia)
    ochroleuca ssp. exilis (Slender volcanic gilia)
    ochroleuca ssp. ochroleuca (Volcanic gilia)
    ochroleuca ssp. vivida (San Gabriel Mountains gilia)
    ophthalmoides (Eyed gilia)
    scopulorum (Rock gilia)
    sinuata (Rosy gilia)
    splendens ssp. grantii, see Saltugilia splendens ssp. grantii
    splendens ssp. splendens, see Saltugilia ssp. splendens
    stellata (Star gilia)
    transmontana (Transmontane gilia)
    tricolor ssp. diffusa (Birdseye gilia)
    triodon, see Aliciella triodon
Ipomopsis
    arizonica (Arizona ipomopsis)
    congesta ssp. montana (Ballhead ipomopsis)
    polycladon (Spreading gilia)
Langloisia
    setosissima ssp. punctata (Lilac sunbonnets)
    setosissima ssp. setosissima (Bristly langloisia)
Leptodactylon
    californicum, see Linanthus californicus
    jaegeri, see Linanthus jaegeri
    pungens, see Linanthus pungens
Leptosiphon
    chrysanthus ssp. chrysanthus (Golden gilia)
    chrysanthus ssp. decorus (Cream gilia)
    bicolor (True babystars)
    breviculus (Mojave linanthus)
    ciliatus (Whiskerbrush)
    floribundus ssp. floribundus (Many-flowered linanthus)
    floribundus ssp. glaber (Smooth many-flowered linanthus)
    floribundus ssp. hallii (Santa Rosa Mountains linanthus)
    grandiflorus (Large-flowered leptosiphon)
    lemmonii (Lemmon's linanthus)
    liniflorus (Flax-flowered linanthus)
    parviflorus (Common linanthus)
    pygmaeus ssp. continentalis (Pygmy linanthus)
Linanthus
    aureus ssp. aureus, see Leptosiphon aureus ssp. aureus
    aureus ssp. decorus, see Leptosiphon aureus ssp. decorus
    bellus (Desert beauty)
    bigelovii ssp. johnsonii (Bigelow's linanthus)
    breviculus, see Leptosiphon breviculus
    californicus (Prickly phlox)
    campanulatus (Bell gilia)
    ciliatus, see Leptosiphon ciliatus
    concinnus (San Gabriel linanthus)
    demissus (Desert linanthus)
    dianthiflorus (Ground pink)
    dichotomus (Evening snow)
    filiformis (Threadstem gilia)
    floribundus ssp. floribundus, see Leptosiphon floribundus ssp. floribundus
    floribundus ssp. glaber, see Leptosiphon floribundus ssp. glaber
    floribundus ssp. hallii, see Leptosiphon floribundus ssp. hallii
    jaegeri (San Jacinto prickly phlox)
    jonesii (Jones' linanthus)
    killipii (Baldwin Lake linanthus)
    liniflorus, see Leptosiphon liniflorus
    maculatus ssp. maculatus (Little San Bernardino Mountains linanthus)
    parryae (Parry's linanthus)
    parviflorus, see Leptosiphon parviflorus
    pungens (Mountain prickly phlox)
    pygmaeus ssp. continentalis, see Leptosiphon pygmaeus ssp. continentalis
Loeseliastrum
    matthewsii (Desert calico)
    schottii (Schott's calico)
Microsteris gracilis (Slender phlox)
Navarretia
    atractyloides (Hollyleaf navarretia)
    breweri (Brewer's navarretia)
    capillaris (Miniature gilia)
    fossalis (Spreading navarretia)
    hamata ssp. hamata (Hooked navarretia)
    leptalea ssp. bicolor (Bridges' gilia)
    ojaiensis (Ojai navarretia)
    peninsularis (Baja navarretia)
    prostrata (Prostrate navarretia)
Phlox
    austromontana (Southern mountain phlox)
    condensata (Condensed phlox)
    diffusa (Spreading phlox)
    dolichantha (Big Bear Valley phlox)
    gracilis, see Microsteris gracilis
    stansburyi ssp. stansburyi (Stansbury phlox)
Polemonium occidentale (Western sky pilot)
Saltugilia
    australis (Southern woodland-gilia)
    caruifolia (Caraway-leaved gilia)
    latimeri (Latimer's woodland-gilia)
    splendens ssp. grantii (Grant's woodland-gilia)
    splendens ssp. splendens (Splendid woodland-gilia)

Polygalaceae (Milkwort):

Rhinotropis
    acanthoclada (Desert polygala)
    cornuta var. fishiae (Fish's milkwort)

Polygonaceae (Buckwheat):

Acanthoscyphus
    parishii var. goodmaniana (Cushenbury oxytheca)
    parishii var. parishii (Parish's oxytheca)
Bistorta bistortoides (Western bistort)
Centrostegia thurberi (Thurber's spineflower)
Chorizanthe
    brevicornu var. brevicornu (Brittle spineflower)
    corrugata (Wrinkled spineflower)
    fimbriata var. fimbriata (Fringed spineflower)
    fimbriata var. laciniata (Lace-fringed spineflower)
    leptotheca (Peninsular spineflower)
    membranacea (Pink spineflower)
    parryi var. fernandina (San Fernando Valley spineflower)
    procumbens (Prostrate spineflower)
    rigida (Rigid spineflower)
    spinosa (Mojave spineflower)
    staticoides (Turkish rugging)
    watsonii (Five-tooth spineflower)
    xanti var. leucotheca (Riverside spineflower)
    xanti var. xanti (Xantus' spineflower)
Dedeckera eurekensis (July gold)
Emex spinosa (Devil's thorn)*
Eriogonum
    angulosum (Angled-stem buckwheat)
    apiculatum (San Jacinto buckwheat)
    arborescens (Santa Cruz Island buckwheat)
    baileyi var. baileyi (Bailey's buckwheat)
    brachyanthum (Shortflower buckwheat)
    brachypodum (Parry's wild buckwheat)
    callistum (Tehachapi buckwheat)
    cinereum (Ashy-leaf buckwheat)
    cithariforme var. agninum (Santa Ynez wild buckwheat)
    cithariforme var. cithariforme (Cithara wild buckwheat)
    contiguum (Reveal's buckwheat)
    crocatum (Conejo buckwheat )
    davidsonii (Davidson's buckwheat)
    deflexum var. baratum (Tall skeleton weed)
    deflexum var. deflexum (Flatcrown buckwheat)
    deserticola (Dune buckwheat)
    elongatum var. elongatum (Longstem buckwheat)
    eremicola (Wildrose Canyon buckwheat)
    fasciculatum var. fasciculatum (Coastal California buckwheat)
    fasciculatum var. flavoviride (East Mojave buckwheat)
    fasciculatum var. foliolosum (Leafy buckwheat)
    fasciculatum var. polifolium (California wild buckwheat)
    giganteum var, compactum (Santa Barbara Island buckwheat)
    giganteum var. giganteum (St. Catherine's lace)
    gilmanii (Gilman's buckwheat)
    gracile var. gracile (Slender buckwheat)
    gracilipes (White Mountains wild buckwheat)
    gracillimum (Rose-and-white buckwheat)
    grande var. grande (Island buckwheat)
    grande var. rubescens (Red-flowered buckwheat)
    heermannii var. argense (Heermann's buckwheat)
    heermannii var. floccosum (Clark Mountains buckwheat)
    heermannii var. heermannii (Large Heermann's buckwheat)
    hoffmannii var. robustius (Robust Hoffmann's buckwheat)
    inflatum (Desert trumpet)
    intrafractum (Jointed buckwheat)
    kennedyi var. alpigenum (Southern alpine buckwheat)
    kennedyi var. austromontanum (Southern mountain buckwheat)
    kennedy var. kennedyi (Kennedy's buckwheat)
    maculatum (Spotted buckwheat)
    microtheca var. corymbosoides (San Bernardino buckwheat)
    microtheca var. johnstonii (Johnston's buckwheat)
    microtheca var. simpsonii (Simpson's buckwheat)
    molestum (Pineland buckwheat)
    nidularium (Birdnest buckwheat)
    nudum var. pauciflorum (Few-flowered naked buckwheat)
    nudum var. westonii (Weston's buckwheat)
    ordii (Fort Mojave buckwheat)
    ovalifolium var. ovalifolium (Oval-leaved buckwheat)
    ovalifolium var. vineum (Cushenbury buckwheat)
    palmerianum (Palmer's buckwheat)
    panamintense (Panamint buckwheat)
    parishii (Parish's buckwheat)
    parvifolium (Seacliff buckwheat)
    plumatella (Flat-topped buckwheat)
    pusillum (Yellow turban)
    reniforme (Kidneyleaf buckwheat)
    rixfordii (Rixford's buckwheat)
    roseum (Wand buckwheat)
    saxatile (Rock buckwheat)
    thomasii (Thomas' buckwheat)
    thornei (Thorne's buckwheat)
    thurberi (Thurber's buckwheat)
    trichopes (Little desert trumpet)
    umbellatum var. minus (Alpine sulphur-flowered buckwheat)
    umbellatum var. munzii (Munz's buckwheat)
    umbellatum var. nevadense (Nevada buckwheat)
    umbellatum var. subaridum (Sulphur-flowered buckwheat)
    umbellatum var. versicolor (Varicolored buckwheat)
    wrightii var. membranaceum (Ring-stemmed bastard-sage)
    wrightii var. nodosum (Knot-stemmed bastard-sage)
    wrightii var. subscaposum (Short-stemmed bastard-sage)
    wrightii var. wrightii (Wright's bastard-sage)
Hollisteria lanata (False-spineflower)
Lastarriaea coriacea (Leather spineflower)
Mucronea californica (California spineflower)
Oxytheca
    caryophylloides, see Sidotheca caryophylloides
    emarginata, see Sidotheca emarginata
    parishii var. cienegensis, see Acanthoscyphus parishii var. cienegensis
    parishii var. goodmaniana, see Acanthoscyphus parishii var. goodmaniana
    parishii var. parishii, see Acanthoscyphus parishii var. parishii
    perfoliata (Roundleaf oxytheca)
    trilobata, see Sidotheca trilobata
Persicaria
    amphibia (Swamp knotweed)
    capitata (Himalayan smartweed)*
    hydropiper (Water pepper)
    lapathifolia (Willow smartweed)
    punctata (Water smartweed)
Polygonum
    amphibium var. emersum, see Persicaria amphibia
    arenastrum, see Polygonum aviculare ssp. depressum
    aviculare ssp. depressum (Common knotweed)*
    bistortoides, see Bistorta bistortoides
    capitatum, see Persicaria capitata
    douglasii (Douglas's knotweed)
    douglasii ssp. johnstonii, see Polygonum sawatchense ssp. sawatchense
    lapathifolium, see Persicaria lapathifolia
    polygaloides ssp. kelloggii (Kellogg's knotweed)
    punctatum, see Persicaria punctata
    sawatchense ssp. sawatchense (Sawatch knotweed)
Pterostegia drymarioides (Threadstem)
Rumex
    acetosella (Sheep sorrel)*
    californicus (Willow-leaved dock)
    conglomeratus (Whorled dock)*
    crispus (Curly dock)*
    hymenosepalus (Wild-rhubarb)
    pulcher (Fiddle dock)*
    salicifolius var. denticulatus see Rumex californicus
Sidotheca
    caryophylloides (Chickweed oxytheca)
    emarginata (Whitemargin oxytheca)
    trilobata (Threelobe oxytheca)

Polypodiaceae (Polypody):

Polypodium
    californicum (California polypody)
    hesperium (Western polypody)


Portulacaceae (Purslane):

Portulaca
    halimoides (Desert portulaca)
    oleracea (Purslane)*


Potamogetonaceae (Pondweed):

Potemogeton diversifolius (Diverse-leaved pondweed)


Primulaceae (Primrose):

Androsace septentrionalis (Pygmy-flower rockjasmine)
Dodecatheon, see Primula
Primula
    clevelandii var. clevelandii (Shooting star)
    clevelandii var. insularis (Island shooting star)
    fragrans (Fragrant shooting star)
    hendersonii (Foothill shooting star)
    tetrandra (Alpine shooting star)

Pteridaceae (Brake):

Adiantum
    aleuticum (Five-finger fern)
    capillus-veneris (Maidenhair fern)
    jordanii (California maidenhair fern)
Argyrochosma jonesii (Jones' cloak fern)
Aspidotis californica (California lace fern)
Astrolepis cochisensis (Scaly cloak fern)
Cheilanthes
    clevelandii, see Myriopteris clevelandii
    cooperae, see Myriopteris cooperae
    covillei, see Myriopteris covillei
    feei, see Myriopteris gracilis
    newberryi, see Myriopteris newberryi
    parryi, see Myriopteris parryi
    viscida, see Myriopteris viscida
Cryptogramma acrostichoides (American rock-brake)
Myriopteris
    clevelandii (Cleveland's lip fern)
    cooperae (Cooper's lip fern)
    covillei (Coville's lip fern)
    gracilis (Slender lip fern)
    newberryi (Cotton fern)
    parryi (Parry's lip fern)
    viscida (Viscid lip fern)
    wootonii (Wooton's lip fern)
Notholaena californica (California cloak fern)
Pellaea
    andromedifolia (Coffee fern)
    breweri (Brewer's cliffbrake)
    mucronata var. californica (California cliff brake)
    mucronata var. mucronata (Bird's-foot fern)
    truncata (Cliff brake)
Pentagramma
    maxonii (Maxon's goldback fern)
    rebmanii (Rebman's silverback fern)
    triangularis ssp. triangularis (Goldback fern)
    viscosa (Coastal silverback fern)
Pteris vittata (Ladder brake)*

Ranunculaceae (Buttercup):

Actaea rubra (Red baneberry)
Anemone tuberosa (Desert windflower)
Aquilegia formosa (Columbine)
Clematis
    lasiantha (Pipestems)
    ligusticifolia (Virgin's bower)
    pauciflora (Ropevine)
Delphinium
    cardinale (Scarlet larkspur)
    glaucum (Mountain larkspur)
    gypsophilum (Gypsum-loving larkspur)
    hansenii ssp. kernense (Kern larkspur)
    parishii ssp. pallidum (Pale larkspur)
    parishii ssp. parishii (Desert larkspur)
    parishii ssp. subglobosum (Colorado Desert larkspur)
    parryi ssp. parryi (Blue larkspur)
    patens ssp. hepaticoideum (Spreading larkspur)
    patens ssp. montanum (Mountain spreading larkspur)
Myosurus
    apetalus var. montanus (Bristly mousetail)
    cupulatus (Desert mousetail)
Ranunculus
    alismifolius var. alismellus (Small water-plantain buttercup)
    aquatilis var. diffusus (Water buttercup)
    californicus var. californicus (California buttercup)
    cymbalaria (Alkali buttercup)
    eschscholtzii var. oxynotus (Eschscholtz's buttercup)
    hebecarpus (Delicate buttercup)
    occidentalis (Western buttercup)
    sceleratus (Cursed crowfoot)
    testiculatus (Tubercled crowfoot)*
Thalictrum
    fendleri var. fendleri (Fendler's meadow-rue)
    fendleri var. polycarpum (Meadow-rue)
    sparsiflorum (Few-flowered meadow-rue)