Southern California Wildflowers
Common names T-Z

Brackets [ ] indicate taxa not necessarily recognized by the Jepson Manual but which I think are deserving of separate listings because they are so very different. Names preceded by the word 'Common' in brackets such as [Common] Hawkweed are not necessarily the most common species of the genus, but simply do not have any other descriptive name. The use of the name [Common] in this context is solely for indexing purposes.

* Indicates introduced and naturalized species



Tackstem,
    White (Calycoseris wrightii)
    Yellow (Calycoseris parryi)
Tahquitz ivesia (Ivesia callida)
Tall fescue (Festuca arundinacea)*
Tall flat sedge (Cyperus eragrostis)
Tall hawksbeard (Crepis acuminata)
Tall horseweed (Erigeron canadensis)
Tall melica (Melica frutescens)
Tall skeleton weed (Eriogonum deflexum var. baratum)
Tall wheat grass (Elymus ponticus)*
Tanbark oak (Notholithocarpus densiflorus var. densiflorus)
Tansy mustard,
    Appressed-fruited mountain (Descurainia incana)
    [Common] (Descurainia pinnata ssp. glabra)
    Mountain (Descurainia incisa ssp. incisa)
    Sierra (Descurainia californica)
    Western (Descurainia pinnata ssp. brachycarpa)
Tansy phacelia (Phacelia tanacetifolia)
Tarragon, Wild (Artemisia dracunculus)
Tarplant,
    Graceful (Holocarpha virgata ssp. elongata)
    Heermann's (Holocarpha heermannii)
    Island (Deinandra clementina)
    Kellogg's (Deinandra kelloggii)
    Kern (Deinandra pallida)
    Mojave (Deinandra mohavensis)
    Otay (Deinandra conjugens)
    Red Rock (Deinandra arida)
    San Diego (Deinandra paniculata)
    Santa Susana (Deinandra minthornii)
    Slender (Deinandra fasciculata)
    Southern (Centromadia parryi ssp. australis)
Tauschia,
    Parish's (Tauschia parishii)
    Southern (Tauschia arguta)
Tawny popcorn flower (Plagiobothrys fulvus var. campestris)
Tecate cypress (Hesperocyparis forbesii)
Tehachapi buckwheat (Eriogonum callistum)
Tehachapi monardella (Monardella linoides ssp. oblonga)
Tehachapi ragwort (Packera ionophylla)
Tejon cryptantha (Cryptantha microstachys)
Tejon poppy (Eschscholzia lemmonii ssp. kernensis)
Telegraph weed (Heterotheca grandiflora)
Terracina spurge (Euphorbia terracina)*
Tetracoccus,
    Holly-leaved (Tetracoccus ilicifolius)
    Parry's (Tetracoccus dioicus)
Thickleaf yerba santa (Eriodictyon crassifolium var. crassifolium)
Thick-leaved ground-cherry (Physalis crassifolia)
Thick-leaved phacelia (Phacelia pachyphylla)
Thickstem wild cabbage (Caulanthus crassicaulis)
Thimbleberry (Rubus parviflorus)
Thimblehead, Wright's (Hymenothrix wrightii)
Thistle,
    Barbwire Russian (Salsola paulsenii)*
    Blessed (Centaurea benedictus)*
    Bull (Cirsium vulgare)*
    California (Cirsium occidentale var. californicum)
    Cobweb (Cirsium occidentale var. occidentale)
    Desert (Cirsium neomexicanum)
    Elk (Cirsium scariosum var. congdonii)
    Italian (Carduus pycnocephalus ssp. pycnocephalus)*
    Milk (Silybum marianum)*
    Mojave (Cirsium mohavense)
    Red (Cirsium arizonicum var. tenuisectum)
    Russian (Salsola tragus)*
    Southern meadow (Cirsium scariosum var. citrinum)
    Venus (Cirsium occidentale var. venustum)
    Yellow star (Centaurea solstitialis)*
Thistle sage (Salvia carduacea)
Thomas' buckwheat (Eriogonum thomasii)
Thompson's beardtongue (Penstemon thompsoniae)
Thornbush,
    Anderson (Lycium andersonii)
    Fremont's (Lycium fremontii)
Thorne's buckwheat (Eriogonum thornei)
Thornmint,
    Heartleaf (Acanthomintha obovata ssp. cordata)
    San Diego (Acanthomintha ilicifolia)
Thorny skeleton-plant (Pleiacanthus spinosus)
Thoroughwort (Ageratina adenophora)*
Threadleaf rubber rabbitbrush (Ericameria nauseosa ssp. oreophila)
Thread-leaved brodiaea (Brodiaea filifolia)
Threadplant,
    Comb-leaved (Nemacladus pinnatifidus)
    Desert (Nemacladus rubescens)
    Desert short-flowered (Nemacladus longiflorus var. breviflorus)
    Eastern (Nemacladus orientalis)
    Glandular (Nemacladus glanduliferus)
    Mountain long-flowered (Nemacladus longiflorus var. longiflorus)
    Sigmoid (Nemacladus sigmoideus)
    Slender (Nemacladus tenuis var. tenuis)
    Smallflower (Nemacladus ramosissimus)
    Twisselmann's (Nemacladus twisselmannii)
Threadstem (Pterostegia drymarioides)
Threadstem carpet-weed (Mollugo cerviana)*
Threadstem gilia (Linanthus filiformis)
Threadstem madia (Madia exigua)
Three-awn (Aristida adscensionis)
Three-headed showy gilia (Gilia cana ssp. triceps)
Three-hearts (Tricardia watsonii)
Threelobe oxytheca (Sidotheca trilobata)
Three-petal bedstraw (G, trifidum ssp. columbianum), see Sprawling three-petal bedstraw
Three-petal bedstraw (G. trifidum ssp. subbiflorum), see Dwarf three-petal bedstraw
Three-spot (Osmadenia tenella)
Thurber penstemon (Penstemon thurberi)
Thurber's spineflower (Centrostegia thurberi)
Thurber's stemsucker (Pilostyles thurberi)
Thyme-leaved speedwell (Veronica serpyllifolia ssp. humifusa)*
Thyme-leaved spurge (Euphorbia serpyllifolia ssp. serpyllifolia)
Thymophylla, Five-needled (Thymophylla pentachaeta var. belenidium)
Tickseed,
    California (Leptosyne californica)
    Leafstem (Leptosyne calliopsidea)
Tidestrom's milkvetch (Astragalus tidestromii)
Tidy tips,
    Comanche Point (Layia leucopappa)
    White (Layia glandulosa)
     Yellow (Layia platyglossa)
Tiehm's rush (Juncus tiehmii)
Tiling's monkeyflower (Mimulus tilingii)
Timberline phacelia (Phacelia hastata var. hastata)
Tinker's penny (Hypericum anagalloides)
Tiny bedstraw (Galium murale)*
Toad lily (Montia chamissoi)
Toad rush,
    Common (Juncus bufonius var. bufonius)
    Clustered (Juncus bufonius var. congestus)
    Western (Juncus bufonius var. occidentalis)
Toadflax,
    Blue (Nuttallanthus texanus)
    Dalmatian (Linaria dalmatica ssp. dalmatica)*
Tobacco,
    Coyote (Nicotiana attenuata)
    Desert (Nicotiana obtusifolia)
    Indian (Nicotiana quadrivalvis)
    Tree (Nicotiana glauca)
Tocalote (Centaurea melitensis)*
Tomcat clover (Trifolium willdenovii)
Toothed calicoflower (Downingia cuspidata)
Toothed wintergreen (Pyrola dentata)
Torrey pine (Pinus torreyana ssp. torreyana)
Torrey pine, Santa Rosa Island (Pinus torreyana ssp. insularis)
Torrey's amaranth (Amaranthus torreyi)
Torrey's eucrypta (Eucrypta chrysanthemifolia var. bipinnatifida)
Torrey's milkvetch (Astragalus calycosus var. calycosus)
Torrey's saltbush (Atriplex torreyi var. torreyi)
Torrey's scrub oak (Quercus acutidens)
Tower mustard (Turritis glabra)
Toyon (Heteromeles arbutifolia)
Toyon berries (Heteromeles arbutifolia)
Tracy's woolstar (Eriastrum tracyi)
Trailing windmills (Allionia incarnata var. incarnata)
Transmontane gilia (Gilia transmontana)
Transverse fine-flower gilia (Gilia leptantha ssp. transversa)
Transverse Range manzanita (Arctostaphylos glandulosa ssp. mollis)
Trask's yerba santa (Eriodictyon traskiae)
Tree of heaven (Ailanthus altissima)*
Tree poppy, Channel Island (Dendromecon harfordii)
Tree tobacco (Nicotiana glauca)*
Trefoil, Pitch (Bituminaria bituminosa)*
Triangular-fruit sedge (Carex triquetra)
Tridens, Slim (Tridens muticus)
Triple-ribbed milkvetch (Astragalus tricarinatus)
Triteleia, Coast range (Triteleia lugens)
Trixis, California (Trixis californica var. californica)
Tubercled crowfoot (Ranunculus testiculatus)*
Tucker's oak (Quercus john-tuckeri)
Tufted evening primrose (Oenothera cespitosa ssp. marginata)
Tufted poppy (Eschscholzia caespitosa)
Tumble mustard (Sisymbrium altissimum)*
Turion duckweed (Lemna turionifera)
Turkey pea (Sanicula tuberosa)
Turkish rugging (Chorizanthe staticoides)
Turpentine bush (Ericameria laricifolia)
Turpentine-broom (Thamnosma montana)
Turtleback (Psathyrotes ramosissima)
Twayblade (Listera convallarioides)
Twiggy wreathplant (Stephanomeria virgata ssp. virgata)
Twinberry (Lonicera involucrata var. ledebourii)
Twining snapdragon (Antirrhinum kelloggii)
Twinleaf bedstraw (Galium bifolium)
Twisselmann's threadplant (Nemacladus twisselmannii)
Two-color phacelia (Phacelia bicolor)
Two-seeded milkvetch (Astragalus didymocarpus var. didymocarpus)
Two-tone everlasting (Pseudognaphalium biolettii)
Umbrella plant (Cyperus involucratus)*
Unicorn-plant, Desert (Proboscidea althaeifolia)
Urn-flowered alumroot, see Elegant alumroot
Utah agave (Agave utahensis)
Utah fendlerbush (Fendlerella utahensis)
Utah juniper (Juniperus osteosperma)
Utah penstemon (Penstemon utahensis)
Utah serviceberry (Amelanchier utahensis)
Valerian, Red (Centranthus ruber)*
Valley broomrape (Orobanche vallicola)
Valley mayweed (Matricaria occidentalis)
Valley oak (Quercus lobata)
Valley or cane cholla (Cylindropuntia californica var. parkeri)
Valley lupine (Lupinus microcarpus var. microcarpus)
Valley popcorn flower (Plagiobothrys canescens var. canescens)
Varicolored buckwheat (Eriogonum umbellatum var. versicolor)
Varied milkvetch (Astragalus lentiginosus var. variabilis)
Variegated dudleya (Dudleya variegata)
Vasey's prickly-pear (Opuntia Xvaseyi)
Vasey's sage (Salvia vaseyi)
Veatch's blazing star (Mentzelia veatchiana)
Velvet ash (Fraxinus velutina)
Velvet-mallow
    Newberry's (Horsfordia newberryi)
    Pink (Horsfordia alata)
Velvety false-lupine (Thermopsis californica var. semota)
Ventura marsh milkvetch (Astragalus pycnostachyus var. lanosissimus)
Venus looking-glass (Triodanis biflora)
Venus thistle (Cirsium occidentale var. venustum)
Vera dulce (Aloysia wrightii)
Verbena,
    Big-bract (Verbena bracteata)
    Goodding's (Verbena gooddingii)
Vernal water-starwort (Callitriche palustris)
Vervain,
    Mint-leaved (Verbena menthifolia)
    Robust (Verbena lasiostachys var. scabrida)
    Western (Verbena lasiostachys var. lasiostachys)
Vetch,
    American (Vicia americana ssp. americana)
    Hairy winter (Vicia villosa ssp. villosa)*
    Narrow-leaved (Vicia sativa ssp. nigra)*
    Slender (Vicia hassei)
    Slim (Vicia ludoviciana ssp. ludoviciana)
    Spring (Vicia sativa ssp. sativa)*
    Smooth winter (Vicia villosa ssp. varia)*
Viguiera, Parish's (Viguiera parishii)
Vinegar weed (Trichostema lanceolatum)
Violet,
    Douglas's (Viola douglasii)
    Goosefoot (Viola purpurea ssp. purpurea)
    Gray-leaved (Violet pinetorum ssp. grisea)
    Macloskey's (Viola macloskeyi)
    Mojave goosefoot (Viola purpurea ssp. mohavensis)
    Oak (Viola purpurea ssp. quercetorum)
    Pine (Viola pinetorum ssp. pinetorum)
    Shelton's (Viola sheltonii)
    Western dog (Viola adunca ssp. adunca)
    Yellow (Viola lobata ssp. lobata)
Violet false-gilia (Allophyllum gilioides ssp. violaceum)
Violet snapdragon (Antirrhinum nuttallianum ssp. nuttallianum)
Violet twining snapdragon (Maurandella antirrhiniflora)
Virginia peppergrass (Lepidium virginicum ssp. virginicum)
Virgin River cryptantha (Cryptantha virginensis)
Virgin's bower (Clematis ligusticifolia)
Viscid lip fern (Myriopteris viscida)
Volcanic gilia (Gilia ochroleuca ssp. ochroleuca)
Walker's sun cup (Chylismia walkeri ssp. tortilis)
Wall bedstraw (Galium parisiense)*
Wallflower,
    Island (Erysimum insulare)
    Suffrutescent (Erysimum suffrutescens)
    Western (Erysimum capitatum var. capitatum)
Walnut,
    California black (female flowers) (Juglans californica var. californica)
    California black (fruit) (Juglans californica var. californica)
    California black (male flowers) (Juglans californica var. californica)
Wand buckwheat (Eriogonum roseum)
Wand mullein (Verbascum virgatum)*
Wand wirelettuce (Stephanomeria virgata ssp. pleurocarpa)
Warner Springs lessingia (Lessingia glandulifera var. tomentosa)
Wart cress (Lepidium didymum)*
Wartleaf ceanothus (Ceanothus papillosus)
Wartstem ceanothus (Ceanothus verrucosus)
Warty spurge (Euphorbia spathulata)
Water buttercup (Ranunculus aquatilis var. diffusus)
Water chickweed (Montia fontana)
Watercress (Nasturtium officinale)
Water-parsley (Oenanthe sarmentosa)
Water parsnip (Berula erecta)
Water pennywort (Hydrocotyle verticillata)
Water pepper (Persicaria hydropiper)
Water-pimpernel (Samolus parviflorus)
Water plantain (Alisma triviale)
Water-plantain buttercup, Small (Ranunculus alismifolius var. alismellus)
Water pygmy weed (Crassula aquatica)
Water smartweed (Persicaria punctata)
Water speedwell (Veronica anagallis-aquatica)*
Water-starwort
    [Common] (Callitriche heterophylla var. bolanderi)
    Vernal (Callitriche palustris)
Waterweed, Western (Elodea nuttallii)
Wattle,
    Cootamundra (Acacia baileyana)*
    Golden (Acacia longifolia)*
Watson's saltbush (Atriplex watsonii)
Watson's spike-moss (Selaginella watsonii)
Wavyleaf bee blossom (Oenothera sinuosa)*
Wax currant (Ribes cereum var. cereum)
Wax-myrtle, California (Morella californica)
Waxy saltbush (Atriplex glauca)*
Weak bluegrass (Poa infirma)*
Wedge-leaf horkelia (Horkelia cuneata var. cuneata)
Weed's intermediate mariposa lily (Calochortus weedii var. intermedius)
Weed's mariposa lily (Calochortus weedii var. weedii)
Weedy cudweed (Pseudognaphalium luteoalbum)*
Western azalea (Rhododendron occidentale)
Western bistort (Bistorta bistortoides)
Western blue flag (Iris missouriensis)
Western blue flax (Linum lewisii var. lewisii)
Western bog yellow-cress (Rorippa palustris ssp. palustris)
Western buttercup (Ranunculus occidentalis)
Western chokecherry (Prunus virginiana var. demissa)
Western cowbane (Oxypolis occidentalis)
Western dichondra (Dichondra occidentalis)
Western dog violet (Viola adunca ssp. adunca)
Western dwarf mistletoe (Arceuthobium campylopodum)
Western false-indigo (Amorpha fruticosa)
Western field dodder (Cuscuta campestris)
Western gilia (Gilia aliquanta ssp. breviloba)
Western goldenrod (Euthamia occidentalis)
Western hackberry (Celtis reticulata)
Western hawksbeard (Crepis occidentalis)
Western lady's mantle (Aphanes occidentalis)
Western lanceleaf aster (Symphyotrichum lanceolatum ssp. hesperium)
Western morning glory (Calystegia occidentalis ssp. fulcrata)
Western mountain aster (Symphyotrichum spathulatum var. spathulatum)
Western needlegrass (Stipa occidentalis ssp. occidentalis)
Western pearlwort (Sagina decumbens ssp. occidentalis)
Western poison oak (Toxicodendron diversilobum)
Western polypody (Polypodium hesperium)
Western prickly-pear (Opuntia occidentalis)
Western ragweed (Ambrosia psilostachya)
Western raspberry (Rubus leucodermis)
Western redbud (Cercis occidentalis)
Western sky pilot (Polemonium occidentale ssp. occidentale)
Western snakeroot (Ageratina occidentalis)
Western sword fern (Polystichum munitum)
Western sycamore (Platanus racemosa)
Western tansy mustard (Descurainia pinnata ssp. brachycarpa)
Western toad rush (Juncus bufonius var. occidentalis)
Western vervain (Verbena lasiostachys var. lasiostachys)
Western wallflower (Erysimum capitatum var. capitatum)
Western waterweed (Elodea nuttallii)
Weston's buckwheat (Eriogonum nudum var. westonii)
Wheat grass,
    Desert crested (Agropyron cristatum ssp. pectinatum)*
    Intermediate (Elymus hispidus)*
    Slender (Elymus trachycaulus ssp. trachycaulus)
    Tall (Elymus ponticus)*
Wheeler's cinquefoil (Potentilla wheeleri)
Wheelscale saltbush (Atriplex elegans var. fasciculata)
Whiskerbrush (Leptosiphon ciliatus)
Whispering bells (Emmenanthe penduliflora var. penduliflora)
White alder (Alnus rhombifolia)
White catchfly (Silene verecunda)
White clover (Trifolium repens)*
White easter bonnets (Eriophyllum lanosum)
White false-gilia (Allophyllum integrifolium)
White fiesta flower (Pholistoma membranaceum)
White fir (Abies concolor)
White-flowered bluecup (Githopsis diffusa ssp. candida)
White-flowered bog orchid (Platanthera dilatata var. leucostachys)
White-flowered filaree (California macrophylla)
White-flowered hawkweed (Hieracium albiflorum)
White-flowered rabbitbrush (Ericameria albida)
White-flowered rock-rose (Cistus ladanifer var. albiflorus)*
White-flowering currant (Ribes indecorum)
White hedge-nettle (Stachys albens)
White-leaf monardella (Monardella hypoleuca ssp. hypoleuca)
White mallow (Eremalche exilis)
Whitemargin oxytheca (Sidotheca emarginata)
White Mountains horkelia (Horkelia hispidula)
White Mountains milkvetch (Astragalus lentiginosus var. semotus)
White Mountains wild buckwheat (Eriogonum gracilipes)
White nightshade (Solanum douglasii)
White pincushion (Chaenactis artemisiifolia)
Whiteplume wirelettuce (Stephanomeria exigua ssp. coronaria)
White rhatany (Krameria bicolor)
White sage (Salvia apiana)
White sand verbena (Abronia turbinata)
White snapdragon (Antirrhinum coulterianum)
White snowberry (Symphoricarpos albus var. laevigatus)
Whitestem blazing star (Mentzelia albicaulis)
White-stem filaree (Erodium moschatum)*
White-stemmed milkweed (Asclepias albicans)
White sweetclover (Melilotus albus)*
White tackstem (Calycoseris wrightii)
Whitethorn,
    Chaparral (Ceanothus leucodermis)
    Mountain (Ceanothus cordulatus)
White tidy tips (Layia glandulosa)
Whitetip clover (Trifolium variegatum)
White-veined wintergreen (Pyrola picta)
White-whorled lupine (Lupinus microcarpus var. densiflorus)
Whitney's locoweed (Astragalus whitneyi var. whitneyi)
Whorled dock (Rumex conglomeratus)*
Whorl-leaf penstemon (Keckiella ternata var. ternata)
Wide-leaved Parish's yampah (Perideridia parishii ssp. latifolia)
Wide-leaved rock goldenbush (Ericameria cuneata var. spathulata)
Wiggins's croton (Croton wigginsii)
Wilcox's woolstar (Eriastrum wilcoxii)
Wild cabbage,
    Slender (Caulanthus major)
    Thickstem (Caulanthus crassicaulis)
Wild carrot, American (Daucus pusillus)
Wild celery (Apiastrum angustifolium)
Wild cucumber (Marah macrocarpa)
Wild grape (Vitis girdiana)
Wild heliotrope (Heliotropium curassavicum var. oculatum)
Wild licorice (Glycyrrhiza lepidota)
Wild oxalis (Oxalis pilosa)
Wild peony (Paeonia californica)
Wild peppergrass (Lepidium virginicum ssp. menziesii)
Wild petunia (Petunia parviflora)
Wild radish (Raphanus sativus)*
Wild-rhubarb (Rumex hymenosepalus)
Wild rose (Rosa californica)
Wild strawberry (Fragaria vesca)
Wild tarragon (Artemisia dracunculus)
Wildrose Canyon buckwheat (Eriogonum eremicola)
Wildrye,
    Blue (Elymus glaucus ssp. glaucus)
    Creeping (Elymus triticoides)
    Giant (Elymus condensatus)
    Great Basin (Elymus cinereus)
    Pacific (Elymus pacificus)
Willow,
    Arroyo (Salix lasiolepis)
    Desert (Chilopsis linearis ssp. arcuata)
    Geyer's (Salix geyeriana)
    Goodding's black (Salix gooddingii)
    Hinds' narrowleaf (Salix exigua var. hindsiana)
    Lemmon's (Salix lemmonii)
    Red (Salix laevigata)
    Sandbar (Salix exigua var. exigua)
    Scouler's (Salix scouleriana)
    Shining (Salix lasiandra var. lasiandra)
Willow baccharis (Baccharis salicina)
Willow smartweed (Persicaria lapathifolia)
Willow-herb,
    [Common] (Epilobium ciliatum ssp. ciliatum)
    Field (Epilobium brachycarpum)
    Glandular (Epilobium ciliatum ssp. glandulosum)
    Hall's (Epilobium hallianum)
    Milkflower (Epilobium lactiflorum)
    Oregon (Epilobium oregonense)
    Smooth (Epilobium glaberrimum ssp. glaberrimum)
Willowleaf lettuce (Lactuca saligna)*
Willow-leaved dock (Rumex californicus)
Willowy monardella (Monardella viminea)
Windflower, Desert (Anemone tuberosa)
Wind poppy (Papaver heterophyllum)
Winding mariposa lily (Calochortus flexuosus)
Windmill pink (Silene gallica)*
Windmills
    Hairy (Allionia incarnata var. villosa)
    Trailing (Allionia incarnata var. incarnata)
Winged cryptantha (Cryptantha holoptera)
Winged pectocarya (Pectocarya penicillata)
Wingfruit sun cup (Chylismiella pterosperma)
Wingnut cryptantha (Cryptantha pterocarya)
Winter cress (Barbarea orthoceras)
Winter vetch,
    Hairy (Vicia villosa ssp. villosa)*
    Smooth (Vicia villosa ssp. varia)*
Winterfat (Krascheninnikovia lanata)
Wintergreen,
    Bog (Pyrola asarifolia ssp. asarifolia)
    Lesser (Pyrola minor)
    Toothed (Pyrola dentata)
    White-veined (Pyrola picta)
Wire rush (Juncus balticus)
Wirelettuce,
    Deane's (Stephanomeria exigua ssp. deanei)
    Parry's (Stephanomeria parryi)
    Small wirelettuce (Stephanomeria exigua ssp. exigua)
    Wand (Stephanomeria virgata ssp. pleurocarpa)
    Whiteplume (Stephanomeria exigua ssp. coronaria)
Wireweed (Rigiopappus leptocladus)
Wishbone bush (Mirabilis laevis var. crassifolia)
Wolf's cholla (Cylindropuntia wolfii)
Woodland-gilia
    Grant's (Saltugilia splendens ssp. grantii)
    Latimer's (Saltugilia latimeri)
    Southern (Saltugilia australis)
    Splendid (Saltugilia splendens ssp. splendens)
Woodland spurge (Euphorbia lurida)
Woodland star,
    Bolander's (Lithophragma bolanderi)
    [Common] (Lithophragma affine)
    Hillside (Lithophragma heterophyllum)
    Mission (Lithophragma cymbalaria)
    Slender (Lithophragma tenellum)
    Smallflower (Lithophragma parviflorum var. parviflorum)
Wood rose (Rosa gymnocarpa var. gymnocarpa)
Wood rush, Hairy (Luzula comosa)
Wood sorrel,
    Creeping (Oxalis corniculata)*
    Hairy (Oxalis pilosa)
Woody crinklemat (Tiquilia canescens var. canescens)
Woolly amsonia (Amsonia tomentosa)
Woolly angelica (Angelica tomentosa)
Woolly bluecurls (Trichostema lanatum)
Woolly brickellbush (Brickellia incana)
Woolly bur-sage (Ambrosia eriocentra)
Woolly chaparral pea (Pickeringia montana var. tomentosa)
Woolly daisy (Eriophyllum wallacei)
Woollyhead neststraw (Stylocline micropoides)
Woollyheads,
    Dwarf (Psilocarphus brevissimus var. brevissimus)
    Slender (Psilocarphus tenellus)
Woolly indian paintbrush (Castilleja foliolosa)
Woollyleaf ceanothus (Ceanothus tomentosus)
Woollyleaf manzanita (Arctostaphylos tomentosa)
Woolly lomatium (Lomatium dasycarpum ssp. dasycarpum)
Woolly marigold (Baileya pleniradiata)
Woolly milkweed (Asclepias vestita)
Woolly mountain parsley (Oreonana vestita)
Woolly mullein (Verbascum thapsus)*
Woolly plantain (Plantago ovata)
Woollypod, Bear Valley (Astragalus leucolobus)
Woollypod milkvetch (Astragalus purshii var. tinctus)
Woolly sea-blite (Suaeda taxifolia)
Woolly sunflower,
    [Common] (Eriophyllum lanatum var. obovatum)
    Many-stem (Eriophyllum multicaule)
    Nevin's (Constancea nevinii)
    Pringle's (Eriophyllum pringlei)
Woolstar,
    Desert (Eriastrum eremicum ssp. eremicum)
    Few-flowered (Eriastrum sparsiflorum)
    Giant (Eriastrum densifolium ssp. elongatum)
    Harwood's (Eriastrum harwoodii)
    Miniature (Eriastrum diffusum)
    Mojave (Eriastrum densifolium ssp. mohavense)
    Santa Ana River (Eriastrum densifolium ssp. sanctorum)
    Sapphire (Eriastrum sapphirinum)
    Southern mountain (Eriastrum densifolium ssp. austromontanum)
    Tracy's (Eriastrum tracyi)
    Wilcox's (Eriastrum wilcoxii)
Wooton's lip fern (Myriopteris wootonii)
Wreathplant,
    San Diego (Stephanomeria diegensis)
    Twiggy (Stephanomeria virgata ssp. virgata)
Wright's bedstraw (Galium wrightii)
Wright's buckwheat
    (Eriogonum wrightii var. membranaceum)
    (Eriogonum wrightii var. subscaposum)
    (Eriogonum wrightii var. wrightii)
Wright's collinsia (Collinsia torreyi var. wrightii)
Wright's cudweed (Pseudognaphalium canescens)
Wright's thimblehead (Hymenothrix wrightii)
Wrinkled rush (Juncus rugulosus)
Wright's spiderling (Boerhavia wrightii)
Wrinkled spineflower (Chorizanthe corrugata)
Wyman Creek wild buckwheat (Eriogonum rupinum)
Xantus pincushion (Chaenactis xantiana)
Xantus' spineflower (Chorizanthe xanti var. xanti)
Yampah,
    Adobe (Perideridia pringlei)
    Parish's (Perideridia parishii ssp. parishii)
    Wide-leaved Parish's (Perideridia parishii ssp. latifolia)
Yarrow,
    [Common] (Achillea millefolium)
    Golden (Eriophyllum confertiflorum var. confertiflorum)
Yellow bird-of-paradise (Caesalpinia gilliesii)*
Yellow carpet (Blennosperma nanum var. nanum)
Yellow comet (Mentzelia affinis)
Yellow-cress, Western bog (Rorippa palustris ssp. palustris)
Yellow cryptantha (Cryptantha confertiflora)
Yellow cups (Chylismia brevipes ssp. brevipes)
Yellow-eyed grass (Sisyrinchium elmeri)
Yellow-eyed lupine (Lupinus flavoculatus)
Yellow-frocks (Eriophyllum ambiguum var. paleaceum)
Yellowheads (Trichoptilium incisum)
Yellow mariposa lily (Calochortus clavatus var. pallidus)
Yellow monkeyflower (Mimulus brevipes)
Yellow paintbrush (Castilleja plagiotoma)
Yellow penstemon (Keckiella antirrhinoides var. antirrhinoides)
Yellow peppergrass (Lepidium flavum)
Yellow pincushion (Chaenactis glabriuscula var. glabriuscula)
Yellow pine (Pinus ponderosa var. pacifica)
Yellow salsify (Tragopogon dubius)*
Yellow saucers (Malacothrix sonchoides)
Yellow star thistle (Centaurea solstitialis)*
Yellow-stemmed bush mallow (Malacothamnus densiflorus)
Yellow sweetclover (Melilotus officinalis)*
Yellow tackstem (Calycoseris parryi)
Yellow-throated phacelia (Phacelia brachyloba)
Yellow tidy tips (Layia platyglossa)
Yellow turban (Eriogonum pusillum)
Yellow violet (Viola lobata ssp. lobata)
Yellow water-weed (Ludwigia peploides)
Yerba amarilla (Mentzelia longiloba)
Yerba buena (Clinopodium douglasii)
Yerba mansa (Anemopsis californica)
Yerba santa,
    Bicolored (Eriodictyon crassifolium var. nigrescens)
    Hairy (Eriodictyon trichocalyx var. lanatum)
    Smoothleaf (Eriodictyon trichocalyx var. trichocalyx)
    Thickleaf (Eriodictyon crassifolium var. crassifolium)
    Trask's (Eriodictyon traskiae)
Yosemite rock-cress (Boechera repanda)
Yucca,
    Banana (Yucca baccata var. baccata)
    Chaparral (Hesperoyucca whipplei)
    Mojave (Yucca schidigera)
Yuma spurge (Euphorbia setiloba)
Zaca Lake manzanita, see Eastwood manzanita
Ziegler's aster (Dieteria canescens var. ziegleri)
Zig-zag groundsmoke (Gayophytum heterozygum)
Zygadene, Desert (Zigadenus brevibracteatus)

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