| Acanthaceae | |
| chuparosa Justicia californica | |
| Anacardiaceae | |
| skunkbrush Rhus trilobata | |
| Apiaceae | |
| cow parsnip Heracleum lanatum | |
| Mojave lomatium Lomatium mohavense | |
| purple sanicle Sanicula bipinnatifida | |
| ranger's buttons Sphenosciadium capitellatum | |
| Apocynaceae | |
| woolly bluestar Amsonia tomentosa | |
| spreading dogbane Apocynum androsaemifolium | |
| lamb's horns Cycladenia humilis | |
| Asclepiadaceae | |
| whitestem milkweed Asclepias albicans | |
| Kotolo milkweed Asclepias eriocarpa | |
| narrowleaf milkweed Asclepias fascicularis | |
| rambling milkweed Sarcostemma hirtellum | |
| Asteraceae | |
| rayless goldenhead Acamptopappus sphaerocephalus | |
| yarrow Achillea millefolium | |
| Cooper's dogweed Adenophyllum cooperi | |
| thoroughwort Ageratina adenophora | |
| burrobush Ambrosia dumosa | |
| scale bud Anisocoma acaulis | |
| rosy everlasting Antennaria rosea | |
| gravel ghost Atrichoseris platyphylla | |
| mule fat Baccharis salicifolia | |
| desert marigold Baileya multiradiata | |
| laxflower Baileya pauciradiata | |
| woolly desert marigold Baileya pleniradiata | |
| sweetbush Bebbia juncea var. aspera | |
| tocalote Centaurea melitensis | |
| desert pincushion Chaenactis fremontii | |
| yellow pincushion Chaenactis glabriuscula | |
| rose heath Chaetopappa ericoides | |
| pineapple weed Chamomilla suaveolens | |
| rabbitbrush Chrysothamnus sp. | |
| elk thistle Cirsium scariosum | |
| Bigelow's coreopsis Coreopsis bigelovii | |
| leafy-stemmed coreopsis Coreopsis calliopsidea | |
| giant coreopsis Coreopsis gigantea | |
| common tarweed Deinandra fasciculata | |
| California brittlebush Encelia californica | |
| Asteraceae | |
| brittlebush Encelia farinosa | |
| goldenbush Ericameria sp. | |
| rayless shaggy fleabane Erigeron aphanactis var. congestus | |
| San Jacinto Mountains daisy Erigeron breweri var. jacinteus | |
| golden yarrow Eriophyllum confertiflorum | |
| Pringle eriophyllum Eriophyllum pringlei | |
| Wallace's woolly daisy Eriophyllum wallacei | |
| desert gold Geraea canescens | |
| Bigelow's sneezeweed Helenium bigelovii | |
| dune sunflower Helianthus niveus ssp. canescens | |
| Algodones Dunes sunflower Helianthus niveus ssp. tephrodes | |
| white-flowered hawkweed Hieracium albiflorum | |
| San Diego hulsea Hulsea californica | |
| red-rayed hulsea Hulsea heterochroma | |
| beautiful hulsea Hulsea vestita ssp. callicarpha | |
| cheesebush Hymenoclea salsola | |
| Columbia cutleaf Hymenopappus filifolius | |
| goldfields Lasthenia chrysostoma | |
| white tidy tips Layia glandulosa | |
| tidy tips Layia platyglossa | |
| common California-aster Lessingia filaginifolia | |
| valley lessingia Lessingia glandulifera | |
| Lemmon's lessingia Lessingia lemmonii | |
| spring lessingia Lessingia tenuis | |
| common madia Madia elegans | |
| snake's head Malacothrix coulteri | |
| desert dandelion Malacothrix glabrata | |
| desert star Monoptilon bellioides | |
| Spanish needles Palafoxia arida | |
| golden-rayed pentachaeta Pentachaeta aurea | |
| Lyon's pygmydaisy (second photo) Pentachaeta lyonii | |
| rock daisy Perityle emoryi | |
| California chicory Rafinesquia californica | |
| threadleaf ragwort Senecio flaccidus | |
| Tehachapi ragwort Senecio ionophyllus | |
| Mohave groundsel Senecio mohavensis | |
| arrowleaf ragwort Senecio triangularis | |
| woollyhead neststraw Stylocline micropoides | |
| Fremont's gold Syntrichopappus fremontii | |
| Lemmon's syntrichopappus Syntrichopappus lemmoni | |
| yellowhead Trichoptilium incisum | |
| California trixis Trixis californica | |
| canyon sunflower Venegasia carpesioides | |
| southern mule-ears Wyethia ovata | |
| Mojave aster Xylorhiza tortifolia | |
| Boraginaceae | |
| fiddlenecks Amsinckia sp. | |
| bearded cryptantha Cryptantha barbigera | |
| large-flowered popcorn flower Cryptantha intermedia | |
| purple-root cryptantha Cryptantha micrantha | |
| scented cryptantha Cryptantha utahensis | |
| heliotrope Heliotropium curassavicum | |
| curvenut combseed Pectocarya recurvata | |
| Palmer's crinklemat Tiquilia palmeri | |
| fanleaf crinklemat Tiquilia plicata | |
| Brassicaceae | |
| Parish's rock cress (second photo) Arabis parishii | |
| Brassicaceae | |
| rock cress Arabis sp. | |
| American wintercress Barbarea orthoceras | |
| black mustard Brassica nigra | |
| European searocket Cakile maritima | |
| shepherd's purse Capsella bursa-pastoris | |
| milkmaids Cardamine californica | |
| Cooper's jewelflower Caulanthus cooperi | |
| Coulter's jewelflower Caulanthus coulteri var. coulteri | |
| desert candle Caulanthus inflatus | |
| alkali cusickiella Cusickiella douglasii | |
| spectacle pod Dithyrea californica | |
| Western wallflower Erysimum capitatum | |
| island wallflower Erysimum insulare | |
| yellow pepper-grass Lepidium flavum | |
| wild radish Raphanus sativus | |
| prince's plume Stanleya pinnata | |
| Cactaceae | |
| Engelmann's hedgehog cactus Echinocereus engelmannii | |
| claret-cup cactus Echinocereus triglochidiatus | |
| California barrel cactus Ferocactus cylindraceus var. cylindraceus | |
| fishhook cactus Mammilaria dioica | |
| beavertail cactus Opuntia basilaris | |
| teddy bear cholla Opuntia bigelovii | |
| Capparaceae | |
| bladderpod Isomeris arborea | |
| Caryophyllaceae | |
| Big Bear Valley sandwort Arenaria ursina / Eremogone ursina | |
| Douglas' sandwort Minuartia douglasii | |
| Caryophyllaceae | |
| windmill pink Silene gallica | |
| Indian pink Silene laciniata ssp. major | |
| Lemmon's catchfly Silene lemmonii | |
| Parish's catchfly Silene parishii | |
| San Francisco campion Silene verecunda | |
| Chenopodiaceae | |
| desert holly Atriplex hymenelytra | |
| Chenopodiaceae | |
| winterfat Krascheninnikovia lanata | |
| Cistaceae | |
| pink rockrose Cistus creticus | |
| crimson-spot rockrose Cistus ladanifer | |
| rush-rose Helianthemum scoparium | |
| Cornaceae | |
| Pacific dogwood Cornus nuttallii | |
| Crassulaceae | |
| sand pygmyweed Crassula connata | |
| Crassulaceae | |
| live-forever Dudleya sp. | |
| Davidson's stonecrop Sedum niveum | |
| Cucurbitaceae | |
| desert starvine Brandegea bigelovii | |
| wild cucumber Marah macrocarpus | |
| Ericaceae | |
| manzanita Arctostaphylos sp. | |
| mountain heather Phyllodoce breweri | |
| pinedrops Pterospora andromedea | |
| bog wintergreen Pyrola asarifolia | |
| western azalea Rhododendron occidentale | |
| snow plant Sarcodes sanguinea | |
| Euphorbiaceae | |
| rattlesnake weed Chamaesyce albomarginata | |
| Sonoran sandmat Chamaesyce micromera | |
| desert croton Croton californicus | |
| woodland spurge Euphorbia palmeri | |
| Fabaceae | |
| scarlet milkvetch Astragalus coccineus | |
| freckled milkvetch Astragalus lentiginosus | |
| Peirson's milkvetch Astragalus magdalenae var. peirsonii | |
| Pursh's milkvetch Astragalus purshii var. lectulus | |
| fairyduster Calliandra eriophylla | |
| blue palo verde Cercidium floridum | |
| western redbud Cercis occidentalis | |
| prairie clover Dalea sp. | |
| leather root Hoita macrostachya | |
| Davidson's Sierra Nevada lotus Lotus nevadensis var. davidsonii | |
| narrow-leaved lotus Lotus oblongifolius | |
| deerweed Lotus sp. | |
| Arizona lupine Lupinus arizonicus | |
| miniature lupine Lupinus bicolor | |
| bajada lupine Lupinus concinnus | |
| grape soda lupine Lupinus excubitus | |
| stinging lupine Lupinus hirsutissimus | |
| bush lupine Lupinus sp. | |
| blunt-leaved lupine Lupinus truncatus | |
| little-leaved Mojave indigo bush Psorothamnus arborescens var. minutifolius | |
| Schott's indigo bush Psorothamnus schottii | |
| black locust Robinia pseudoacacia | |
| Spanish broom Spartium junceum | |
| false lupine Thermopsis macrophylla | |
| mountain clover Trifolium longipes | |
| creek clover Trifolium obtusiflorum | |
| purple vetch Vicia villosa | |
| Fagaceae | |
| bush chinquapin Chrysolepis sempervirens | |
| Fouquieriaceae | |
| ocotillo Fouquieria splendens | |
| Garryaceae | |
| silk tassel bush Garrya sp. | |
| Gentianaceae | |
| pine green-gentian Swertia neglecta | |
| Geraniaceae | |
| broad-leaf filaree Erodium botrys | |
| redstem filaree Erodium cicutarium | |
| California geranium Geranium californicum | |
| Grossulariaceae | |
| white-flowering currant Ribes indecorum | |
| chaparral currant Ribes malvaceum | |
| Sierra gooseberry Ribes roezlii | |
| fuschia-flowered gooseberry Ribes speciosum | |
| Hippocastanaceae | |
| California buckeye Aesculus californica | |
| Hydrophyllaceae | |
| whispering bells Emmenanthe penduliflora | |
| thickleaf yerba santa Eriodictyon crassifolium | |
| hairy yerba santa Eriodictyon trichocalyx | |
| common eucrypta Eucrypta chrysanthemifolia ssp. chrysanthemifolia | |
| desert eucrypta Eucrypta micrantha | |
| purple mat Nama demissum | |
| baby blue eyes Nemophila menziesii | |
| short-lobed phacelia Phacelia brachyloba | |
| caltha-leaf phacelia Phacelia calthifolia | |
| desert Canterbury bells Phacelia campanularia | |
| caterpillar phacelia Phacelia cicutaria | |
| Great Valley phacelia Phacelia ciliata | |
| notch-leaf phacelia Phacelia crenulata | |
| little notch-leaf phacelia Phacelia crenulata var. minutiflora | |
| hiddenflower phacelia Phacelia cryptantha | |
| Washoe phacelia Phacelia curvipes | |
| Davidson's phacelia Phacelia davidsonii | |
| wild heliotrope Phacelia distans | |
| Douglas' phacelia Phacelia douglasii | |
| lavender windows Phacelia exilis | |
| Fremont's phacelia Phacelia fremontii | |
| giant-flowered phacelia Phacelia grandiflora | |
| imbricate phacelia Phacelia imbricata | |
| long-stalk phacelia Phacelia longipes | |
| Canterbury bells Phacelia minor | |
| Mojave phacelia Phacelia mohavensis | |
| Charlotte's phacelia Phacelia nashiana | |
| alkali phacelia Phacelia neglecta | |
| thick-leaved phacelia Phacelia pachyphylla | |
| Parry's phacelia Phacelia parryi | |
| specter phacelia Phacelia pedicellata | |
| branching phacelia Phacelia ramosissima | |
| south coast branching phacelia Phacelia ramosissima ssp. austrolitoralis | |
| lacy phacelia Phacelia tanacetifolia | |
| sticky phacelia Phacelia viscida | |
| fiesta flower Pholistoma auritum | |
| white fiesta flower Pholistoma membranaceum | |
| poodle-dog bush Turricula parryi | |
| Iridaceae | |
| western blue flag Iris missouriensis | |
| blue-eyed grass Sisyrinchium bellum | |
| Krameriaceae | |
| littleleaf rhatany Krameria erecta | |
| Lamiaceae | |
| desert lavender Hyptis emoryi | |
| southern mountain monardella Monardella australis | |
| gray monardella Monardella cinerea | |
| mustang mint Monardella lanceolata | |
| little monardella Monardella nana ssp. nana | |
| short-flowered monardella Monardella nana ssp. tenuiflora | |
| paper-bag bush Salazaria mexicana | |
| white sage Salvia apiana | |
| thistle sage Salvia carduacea | |
| chia Salvia columbariae | |
| desert sage Salvia dorrii | |
| purple sage Salvia leucophylla | |
| black sage Salvia mellifera | |
| rose sage Salvia pachyphylla | |
| hummingbird sage Salvia spathacea | |
| grayleaf skullcap Scutellaria siphocampyloides | |
| common skullcap Scutellaria tuberosa | |
| woolly blue curls Trichostema lanatum | |
| Liliaceae | |
| crinkled onion Allium crispum | |
| goldenstar Bloomeria crocea | |
| fairy lantern Calochortus albus | |
| Catalina mariposa lily Calochortus catalinae | |
| clubhair mariposa lily Calochortus clavatus | |
| golden-bowl mariposa lily Calochortus concolor | |
| plain mariposa lily Calochortus invenustus | |
| desert mariposa lily Calochortus kennedyi | |
| Plummer's mariposa lily Calochortus plummerae | |
| butterfly mariposa lily (second photo) Calochortus venustus | |
| blue dicks Dichelostemma capitatum | |
| chocolate lily Fritillaria biflora | |
| desert lily Hesperocallis undulata | |
| lemon lily Lilium parryi | |
| Humboldt lily Lilium sp. | |
| common muilla Muilla maritima | |
| corn lily Veratrum californicum var. californicum | |
| joshua tree Yucca brevifolia | |
| chaparral yucca Yucca whipplei | |
| Fremont's star lily Zigadenus fremontii | |
| Limnanthaceae | |
| Cuyamaca meadowfoam Limnanthes gracilis ssp. parishii | |
| Linaceae | |
| Western blue flax Linum lewisii | |
| Loasaceae | |
| yellow comet Mentzelia affinis | |
| sand blazing star Mentzelia involucrata | |
| blazing star Mentzelia laevicaulis | |
| desert blazing star Mentzelia pumila | |
| Malvaceae | |
| Parry's mallow Eremalche parryi | |
| desert five-spot Eremalche rotundifolia | |
| rock hibiscus Hibiscus denudatus | |
| Fremont's bush mallow Malacothamnus fremontii | |
| common mallow Malva neglecta | |
| checkerbloom Sidalcea malvaeflora | |
| globemallow Sphaeralcea ambigua | |
| Nyctaginaceae | |
| desert sand verbena Abronia villosa | |
| wishbone bush Mirabilis bigelovii | |
| four-o'clock Mirabilis californica | |
| giant four-o'clock Mirabilis multiflora | |
| Onagraceae | |
| California sun-cup Camissonia bistorta | |
| woody bottlewasher Camissonia boothii | |
| golden suncup Camissonia brevipes | |
| Mojave sun cup Camissonia campestris ssp. campestris | |
| heartleaf suncup Camissonia cardiophylla | |
| beach evening primrose Camissonia cheiranthifolia | |
| brown-eyed primrose Camissonia claviformis | |
| pale-yellow suncup Camissonia pallida | |
| speckled clarkia Clarkia cylindrica | |
| winecup clarkia Clarkia purpurea | |
| elegant clarkia Clarkia unguiculata | |
| gunsight clarkia Clarkia xantiana | |
| fireweed Epilobium angustifolium ssp. circumvagum | |
| California fuschia Epilobium canum | |
| dune evening primrose Oenothera deltoides | |
| yellow desert evening-primrose Oenothera primiveris ssp. bufonis | |
| Orchidaceae | |
| spotted coral root Corallorrhiza maculata | |
| stream orchid Epipactis gigantea | |
| bog orchid Platanthera leucostachys | |
| sparse flowered bog orchid Platanthera sparsiflora | |
| Orobanchaceae | |
| chaparral broomrape Orobanche bulbosa | |
| naked broomrape Orobanche uniflora | |
| Paeoniaceae | |
| California peony Paeonia californica | |
| Papaveraceae | |
| chicalote Argemone munita | |
| Papaveraceae | |
| bush poppy Dendromecon rigida | |
| golden eardrops Dicentra chrysantha | |
| collarless California poppy Eschscholzia caespitosa | |
| California poppy Eschscholzia californica | |
| desert golden poppy Eschscholzia glyptosperma | |
| pygmy poppy Eschscholzia minutiflora | |
| Parish's poppy Eschscholzia parishii | |
| small-flowered fairypoppy Meconella denticulata | |
| fire poppy Papaver californicum | |
| cream cups Platystemon californicus | |
| Matilija poppy Romneya sp. | |
| Plantaginaceae | |
| desert plantain Plantago ovata | |
| Polemoniaceae | |
| broadleaf gilia Aliciella latifolia | |
| Polemoniaceae | |
| false-gilia Allophyllum divaricatum | |
| large-flowered collomia Collomia grandiflora | |
| southern mountain woolstar Eriastrum densifolium ssp. austromontanum | |
| desert woolstar Eriastrum eremicum | |
| sapphire woolstar Eriastrum sapphirinum | |
| globe gilia Gilia capitata ssp. abrotanifolia | |
| splendid gilia Gilia splendens | |
| bird's-eye gilia Gilia tricolor | |
| Great Basin langloisia Langloisia setosissima | |
| prickly phlox Leptodactylon californicum | |
| granite gilia Leptodactylon pungens | |
| flax-flowered linanthus Leptosiphon liniflorus | |
| golden gilia Linanthus aureus | |
| Mojave linanthus Linanthus breviculus | |
| whiskerbrush Linanthus ciliatus | |
| San Gabriel linanthus Linanthus concinnus | |
| desertsnow Linanthus demissus | |
| ground pinks Linanthus dianthiflorus | |
| evening snow Linanthus dichotomus | |
| thread linanthus Linanthus filipes | |
| Orcutt's linanthus Linanthus orcuttii | |
| sandblossoms Linanthus parryae | |
| variable linanthus Linanthus parviflorus | |
| Schott's desert calico Loeseliastrum schottii | |
| microsteris Microsteris gracilis | |
| spreading phlox Phlox diffusa | |
| Polygonaceae | |
| Parish's oxytheca Acanthoscyphus parishii | |
| devil's spineflower Chorizanthe rigida | |
| turkish rugging Chorizanthe staticoides | |
| Polygonaceae | |
| desert trumpet Eriogonum inflatum | |
| southern mountain buckwheat Eriogonum kennedyi var. austromontanum | |
| buckwheat Eriogonum sp. | |
| alpine sulphur-flowered buckwheat Eriogonum umbellatum var. minus | |
| western bistort Polygonum bistortoides | |
| trilobia Sidotheca trilobata | |
| Portulacaceae | |
| red maids Calandrinia ciliata | |
| pussypaws Calyptridium umbellatum | |
| little spring beauty Claytonia exigua | |
| miners' lettuce Claytonia perfoliata | |
| bitterroot Lewisia rediviva var. minor | |
| Primulaceae | |
| scarlet pimpernel Anagallis arvensis | |
| shooting stars Dodecatheon clevelandii | |
| Ranunculaceae | |
| western columbine Aquilegia formosa | |
| virgin's bower Clematis lasiantha | |
| scarlet larkspur Delphinium cardinale | |
| coastal larkspur Delphinium decorum | |
| gypsum-loving larkspur Delphinium gypsophilum ssp. gypsophilum | |
| desert larkspur Delphinium parishii | |
| pale-flowered larkspur Delphinium parishii ssp. pallidum | |
| zigzag larkspur Delphinium patens ssp. montanum | |
| larkspur Delphinium sp. | |
| California buttercup Ranunculus californicus | |
| Eschscholtz's buttercup Ranunculus eschscholtzii | |
| water buttercup Ranunculus flammula | |
| meadow-rue Thalictrum sp. | |
| few-flowered meadow-rue Thalictrum sparsiflorum | |
| Rhamnaceae | |
| hoary-leaf ceanothus Ceanothus crassifolius | |
| California lilac Ceanothus sp. | |
| California coffeberry Rhamnus californica | |
| Rosaceae | |
| chamise Adenostoma fasciculatum | |
| ribbonwood Adenostoma sparsifolium | |
| Utah serviceberry Amelanchier utahensis | |
| mountain mahogany Cercocarpus montanus | |
| silverhair mousetail Ivesia argyrocoma | |
| Sierra mousetail Ivesia santolinoides | |
| mountain sticky cinquefoil Potentilla glandulosa ssp. reflexa | |
| antelope brush Purshia tridentata | |
| wild rose Rosa californica | |
| thimbleberry Rubus parviflorus | |
| Saxifragaceae | |
| woodland star Lithophragma affine | |
| California saxifrage Saxifraga californica | |
| Scrophulariaceae | |
| Coulter's snapdragon Antirrhinum coulterianum | |
| desert twining snapdragon Antirrhinum filipes | |
| twining snapdragon Antirrhinum kelloggi | |
| ash-gray Indian paintbrush Castilleja cinerea | |
| graceful owl's clover Castilleja densiflora ssp. gracilis | |
| owl's clover Castilleja exserta | |
| San Bernardino Mountains owl's clover Castilleja lasiorhyncha | |
| Indian paintbrush Castilleja sp. | |
| paintbrush Castilleja sp. | |
| desertmountain blue-eyed Mary Collinsia callosa | |
| Chinese houses Collinsia heterophylla | |
| Torrey's blue-eyed Mary Collinsia torreyi | |
| Nevin's bird's-beak Cordylanthus nevinii | |
| rigid bird's beak Cordylanthus rigidus | |
| heartleaf keckiella Keckiella cordifolia | |
| bush monkeyflower Mimulus aurantiacus | |
| Bigelow's monkeyflower Mimulus bigelovii | |
| wide-throated yellow monkeyflower Mimulus brevipes | |
| cardinal monkeyflower Mimulus cardinalis | |
| dense-fruited monkeyflower Mimulus constrictus | |
| seep monkeyflower Mimulus guttatus | |
| Johnston's monkeyflower Mimulus johnstonii | |
| musk monkeyflower Mimulus moschatus | |
| Palmer's monkeyflower Mimulus palmerii | |
| downy monkeyflower Mimulus pilosus | |
| red monkeyflower Mimulus puniceus | |
| Tiling's monkeyflower Mimulus tilingii | |
| lesser mohavea Mohavea breviflora | |
| ghost flower Mohavea confertiflora | |
| Indian warrior Pedicularis densiflora | |
| pinewoods lousewort Pedicularis semibarbata | |
| San Bernardino beardtongue Penstemon caesius | |
| scarlet bugler Penstemon centranthifolius | |
| Grinnell's penstemon Penstemon grinnellii | |
| San Gabriel beardtongue Penstemon labrosus | |
| Palmer's penstemon Penstemon palmeri | |
| Bridge's penstemon Penstemon rostriflorus | |
| brooklime Veronica americana | |
| Solanaceae | |
| desert thorn Lycium brevipes | |
| Fremont's desert thorn Lycium fremontii | |
| coyote tobacco Nicotiana attenuata | |
| Cleveland's tobacco Nicotiana clevelandii | |
| Solanaceae | |
| tree tobacco Nicotiana glauca | |
| desert tobacco Nicotiana obtusifolia | |
| ground cherry Physalis crassifolia | |
| white nightshade Solanum douglasii | |
| purple nightshade Solanum xanti | |
| Sterculiaceae | |
| flannel bush Fremontodendron californicum | |
| Valerianaceae | |
| red valerian Centranthus ruber | |
| Verbenaceae | |
| southwestern mock vervain Verbena gooddingii | |
| Violaceae | |
| Douglas' violet Viola douglasii | |
| Johnny jump-up Viola pedunculata | |
| goosefoot yellow violet Viola pinetorum | |
| Zygophyllaceae | |
| California fagonbush Fagonia laevis | |
| creosote bush Larrea tridentata | |