White Flowers Western Poison Ivy or Poison Oak, Toxicodendron rydbergii Kearney's Sumac or Kearney Sumac, Rhus kearneyi Spectaclepod or Touristplant, Dimorphocarpa wislizeni Bluedick or Blue Dicks, Dichelostemma capitatum Dainty Desert Hideseed or Desert Hideseed, Eucrypta micrantha Soaptree Yucca or Palmella, Yucca elata Joshua Tree or Jaeger's Yucca, Yucca brevifolia, Joshua Tree Banana Yucca or Datil, Yucca baccata Beargrass or Sacahuista, Nolina microcarpa Bigelow's Beargrass, Nolina bigelovii Mojave Desertstar or Bristly Desertstar, Monoptilon bellioides Daisy Desertstar or Mojave Desertstar, Monoptilon bellidiforme White Tackstem or Desert Chickory, Calycoseris wrightii Parachute Plant or Gravel-ghost, Atrichoseris platyphylla Stemless Townsend Daisy or Easter Daisy, Townsendia exscapa Dwarf Milkweed or Largeseed Milkweed, Asclepias involucrata Turkey Tangle Fogfruit or Frog Fruit, Phyla nodiflora Mexican Oregano or Redbrush Lippia, Lippia graveolens Chinese Saltcedar or Saltcedar, Tamarix chinensis American Black Nightshade, Solanum americanum Sharpleaf Groundcherry or Wright Groundcherry, Physalis acutifolia Desert Tobacco or Coyote Tobacco, Nicotiana obtusifolia Western Jimson Weed, Datura wrightii Desert Thorn-apple, Datura discolor Water Speedwell, Veronica anagallis-aquatica Yerba Mansa or Lizard's Tail, Anemopsis californica Bastard Toadflax, Comandra umbellata Pygmy Bluet, Houstonia wrightii Starry Bedstraw or Desert Bedstraw, Galium stellatum Common Bedstraw or Sticky-willy, Galium aparine Cephalanthus occidentalis, Common Buttonbush New Mexico Raspberry or Thimble-berry, Rubus neomexicanus Whitebark Raspberry and Black Raspberry, Rubus leucodermis Cliffrose or Quinine-bush, Purshia stansburiana Apache Plume or Apacheplume, Fallugia paradoxa Utah Serviceberry or Western Serviceberry, Amelanchier utahensis Ceanothus integerrimus or Deerbrush, Ceanothus Deerbrush Ceanothus greggii, Desert Ceanothus Fendler's Ceanothus or Buck-brush, Ceanothus fendleri Drummond's Clematis or Clematis, Clematis drummondii Tuber- or Desert Anemone, Anemone tuberosa Miner's Lettuce, Winter Purslane, Claytonia perfoliata Streambank Springbeauty, Claytonia parviflora Desert Pussypaws, Cistanthe ambigua Silversheath Knotweed or Persian Knotweed, Polygonum argyrocoleon Wright Buckwheat or Shrubby Buckwheat, Eriogonum wrightii Flat-top- or Eastern Mojave- Buckwheat, Eriogonum fasciculatum Skeleton Weed or Flat-toped Buckwheat, Eriogonum deflexum Abert's Buckwheat or Skeleton Weed, Eriogonum abertianum Santa Catalina Mountain Phlox, Phlox tenuifolia Slender Phlox, Phlox (Microsteris) gracilis Bigelow's Linanthus, Linanthus bigelovii Desertsnow or Desert Linanthus, Linanthus demissus Ipomopsis longiflora or Long-flowered Gilia, Flaxflowered Ipomopsis Desert Indianwheat or Woolly Plantain, Plantago ovata Woolly Plantain or Pursh Plantain, Plantago patagonica Rougeplant or Pigeonberry, Rivina humilis Doubleclaw or Unicorn Plant, Proboscidea parviflora Arizona Passionflower or Passionflower, Passiflora arizonica Coulter's Matilija Poppy, Romneya coulteri Creamcups, California Creamcups, Platystemon californicus Southwestern Pricklypoppy, Argemone pleiacantha Sonoran Pricklypoppy, Prickly Poppy, Argemone gracilenta Woody Bottle-washer or Booth's Suncup, Eremothera boothii Oenothera suffrutescens (Gaura coccinea), Scarlet Beeblossom Oenothera speciosa, Mexican Evening Primrose Dune Evening-Primrose, Oenothera deltoides Oenothera coronopifolia, Crownleaf Evening Primrose California Suncup, Oenothera californica Oenothera caespitosa, Tufted Evening Primrose Browneyes or Clavatefruit Suncup, Chylismia claviformis Desert Wishbone-bush, Mirabilis laevis Boerhavia wrightii, Largebract Spiderling Climbing Wartclub or Climbing Spiderling, Boerhavia scandens Fivewing Spiderling, Boerhavia intermedia Coulter's Spiderling, Boerhavia coulteri Arrowleaf Mallow, Malvella sagittifolia Sego Lily, Calochortus nuttallii Chaste Tree, Vitex agnus-castus White or Common Horehound, Marrubium vulgare American Dragonhead, Dracocephalum parviflorum Kaweah River Scorpion-weed, Phacelia magellanica Narrowleaf Yerba Santa, Eriodictyon angustifolium New Mexico Locust, Robinia neomexicana Catclaw Mimosa, Mimosa aculeaticarpa biuncifera Tahitian Kidneywood or Kidneywood, Eysenhardtia orthocarpa Cooley's Bundleflower or Bundleflower, Desmanthus cooleyi Soft Prairie Clover or Downy Dalea, Dalea mollissima Whiteflower Prairieclover, Dalea albiflora Rosary Babybonnets or Coursetia, Coursetia glandulosa Arizona Milkvetch, Astragalus arizonicus Catclaw Acacia or Catclaw, Acacia greggii White-ball Acacia or Fern Acacia, Acaciellia angustissima Matraca, Pitayita or Saramatraca, Peniocereus johnstonii Saguaro or Saguaro Cactus, Carnegiea gigantea, Saguaro Yuma Sandmat, Chamaesyce setiloba Threadstem Sandmat, Chamaesyce revoluta Carrizo Mountain Sandmat, Chamaesyce pediculifera Hyssopleaf Sandmat, Chamaesyce hyssopifolia Chiricahua Mountain or Spurge, Chamaesyce florida Royal Sandmat, Chamaesyce dioica Head Sandmat, Chamaesyce capitellata Arizona Sandmat or Spurge, Chamaesyce arizonica Whitemargin Sandmat or Spurge, Chamaesyce albomarginata Pringle Manzanita, Arctostaphylos pringlei Pointleaf Manzanita, Arctostaphylos pungens Ragged Rockflower or Bigelow's Crossosoma, Crossosoma bigelovii Desert Starvine, Brandegea bigelovii Wild Balsam Apple, Echinopepon wrightii Bigseed Alfalfa Dodder, Cuscuta indecora Wild Cucumber, Marah gilensis Red-osier Dogwood, Cornus sericea Pinkthroat Morning-glory, Ipomoea longifolia (corolla white) Silver Dwarf Morning-glory, Evolvulus sericeus Paiute False Bindweed or Plateau Morningglory, Calystegia longipes Field Bindweed, Convolvulus arvensis Russian Thistle or Tumbleweed, Salsola tragus Chaparral Honeysuckle, Lonicera interrupta Western White Honeysuckle, Lonicera albiflora Blue Elderberry, Sambucus nigra ssp. cerulea Douglas Stitchwort, Minuartia douglasii Redwhisker or Western Clammyweed, Polanisia dodecandra Onyxflower or Cooper Frostmat, Achyronychia cooperi Arizona Popcorn Flower, Plagiobothrys arizonicus Curvenut Combseed, Pectocarya recurvata Bearded Cryptantha, Cryptantha barbigera Palmer's Grapplinghook, Harpagonella palmeri Wingnut Cryptantha or Wingnut Catseye, Cryptantha pterocarya Narrowstem Cryptantha or Narrowstem Catseye, Cryptantha gracilis Gander's Cryptantha, Cryptantha ganderi Panamint Cryptantha, Johnstonella angustifolia Redroot Cryptantha or Redroot Catseye, Cryptantha micrantha Torrey's Cryptantha, Cryptantha torreyana Salt Heliotrope or Heliotrope, Heliotropium curassavicum Little-leaf Cordia or Little-leaf Geigertree, Cordia parvifolia Pearly Globe Amaranth or Ball Clover, Gomphrena nitida Sonoran Globe Amaranth or Ball Clover, Gomphrena sonorae Globe Amaranth or Tufted Ball Clover, Gomphrena caespitosa American Wild Carrot, or Rattlesnake Carrot, Daucus pusillus Common Cowparsnip or Cow Parsnip, Heracleum maximum Nevada Biscuitroot or Wild Parsley, Lomatium nevadense Arizona Milkweed, Asclepias angustifolia Antelope Horns Milkweed, Asclepias asperula Pineneedle or Pine-leaf Milkweed, Asclepias linaria Rush Milkweed or Desert Milkweed, Asclepias subulata Horsetail- or Whorled-Milkweed, Asclepias subverticillata Fringed Twinevine, Sarcostemma cynanchoides Sugar Sumac or Mountain Laurel, Rhus ovata Khaki Weed, Alternanthera caracasana Khakiweed, Alternanthera pungens Small Matweed, Guilleminea densa Common Yarrow or Bloodwort, Achillea millefolium Fragrant Snakeroot or Herbaceous Joepieweed, Ageratina herbacea Western Pearly Everlasting, Anaphalis margaritacea White Woolly Daisy or White Easterbonnets, Eriophyllum lanosum Yerba de Pasmo, Baccharis pteronioides Seep Willow, Water Willow or Mule Fat, Baccharis salicifolia Desert Broom or Greasewood, Baccharis sarothroides Brownplume Wirelettuce, Stephanomeria exigua Desert Zinnia, Spinyleaf Zinnia or Wild-Zinnia, Zinnia acerosa California Chicory or California Plumeseed, Rafinesquia californica Desert Chickory, Rafinesquia neomexicana Slender Poreleaf, Odora or Yerba-del-Venado, Porophyllum gracile Slender Poreleaf, Odora or Yerba-del-Venado, Porophyllum gracile Palafoxia arida var. arida, Desert Palafox Emory's Rockdaisy or Emory’s Rocklily, Perityle emory Canadian Horseweed or Mares Tail, Conyza canadensis Laennecia coulteri, Coulter's Horseweed False Daisy or Eclipter, Eclipta prostrata Plains Blackfoot Daisy, Melampodium leucanthum Whitedaisy Tidytips or Tidy Tips, Layia glandulosa Wright's Thimblehead or Wright's Beeflower, Hymenothrix wrightii Spreading Fleabane or Desert Fleabane, Erigeron divergens Southwestern Cosmos, Cosmos parviflorus Rose Heath or Smallflower Aster, Chaetopappa ericoides Chaenactis carphoclinia var. carphoclinia, Pebble Pincushion Esteve’s Pincushion or Steve’s Pincushion, Chaenactis stevioides Fleshcolor Pincushion, Chaenactis xantiana Fleshcolor Pincushion, Chaenactis xantiana Bigelow's Bristlehead or Bigelow's Bush, Carphochaete bigelovii Bigelow's Beggarticks or Stickseed, Bidens bigelovii Narrowleaf Silverbush, Ditaxis laceolata Sun Spurge, Euphorbia radians Leatherweed, Croton pottsii Wiggins Croton, Croton wigginsii Physicnut or Limberbush, Jatropha cuneata Knotted Hedgeparsley, Torilis nodosa Cliff Fendlerbush or False Mock-orange, Fendlera rupicola Ruby- or Barrier-Saltbush, Enchylaena tomentosa Eve's Needle or Spanish-Bayonet, Yucca-faxoniana Blue Yucca, Yucca rigida Beaked Yucca or Big Bend Yucca, Yucca rostrata Woolly Bluestar or Gray Amsonia, Amsonia tomentosa Baja Elephant Tree or Elephant Tree, Pachycormus discolor Yellowspine Thistle, Cirsium ochrocentrum Brownplume Wirelettuce, Stephanomeria pauciflora Narrowleaf Wirelettuce, Stephanomeria tenuifolia Small Wirelettuce, Stephanomeria exigua California Mustard, Caulanthus lasiophyllus Salad- or Garden-Rocket, Eruca vesicaria ssp. sativa Mesa Pepperwort or Southern Pepperweed, Lepidium alyssoides Singlewhorl Burrobrush, Ambrosia monogyra Singlewhorl Burrobrush, Ambrosia monogyra
