(Eriophyllum lanosum) willowleaf aster (Symphyotrichum praealtum) willow ragwort (Barkleyanthus salicifolius) wingpetal (Heterosperma pinnatum) woolly brickellbush (Brickellia incana) woolly desert marigold (Baileya pleniradiata) woolly eriophyllum (Antheropeas lanosum) woollyhead neststraw (Stylocline micropoides) woolly paperflower (Psilostrophe tagetina) Wooton's ragwort (Senecio wootonii) Wright's baccharis (Baccharis wrightii) Wright's goldenrod (Solidago wrightii) Wright's snakeweed (Gutierrezia wrightii) Wright's thimblehead (Hymenothrix wrightii) yellowdome (Trichoptilium incisum) yellow pincushion (Chaenactis glabriuscula) yellowspine thistle (Cirsium ochrocentrum) yellow starthistle (Centaurea solstitialis) yellow tackstem (Calycoseris parryi) yerba porosa (Porophyllum ruderale) zoapatle (Montanoa tomentosa) Bataceae saltwort (Batis maritima) Berberidaceae creeping barberry (Mahonia repens) Frémont's barberry (Mahonia fremontii) Harrison's barberry (Berberis harrisoniana) Nevin's barberry (Mahonia nevinii) red barberry (Mahonia haematocarpa) Wilcox's barberry (Berberis wilcoxii) Betulaceae aliso (Alnus acuminata) American hophornbeam (Ostrya virginiana) Arizona alder (Alnus oblongifolia) gray alder (Alnus incana) Bignoniaceae catclaw (Dolichandra unguis-cati) desert willow (Chilopsis linearis) Mexican calabash (Crescentia alata) pink tabebuia (Handroanthus impetiginosus) trumpet creeper (Campsis radicans) yellow tabebuia (Tabebuia chrysantha) yellow trumpetbush (Tecoma stans) Bixaceae Mexican yellowshow (Amoreuxia palmatifida) Santa Rita mountain yellowshow (Amoreuxia gonzalezii) silk cottontree (Cochlospermum vitifolium) Blechnaceae palm fern (Blechnum appendiculatum) Boraginaceae adobe popcornflower (Plagiobothrys acanthocarpus) Arizona phacelia (Phacelia arizonica) Arizona popcornflower (Plagiobothrys arizonicus) basin yellow cryptantha (Cryptantha confertiflora) bastard cherry (Ehretia tinifolia) bearded cryptantha (Cryptantha barbigera) black-sage (Cordia curassavica) bristly fiddleneck (Amsinckia tessellata) broadfruit combseed (Pectocarya platycarpa) bushy heliotrope (Heliotropium ternatum) Caracus wigandia (Wigandia urens) chuckwalla combseed (Pectocarya heterocarpa) cleftleaf wildheliotrope (Phacelia crenulata) curaciao bush (Cordia globosa) curvenut combseed (Pectocarya recurvata) dainty desert hideseed (Eucrypta micrantha) desert Canterbury bells (Phacelia campanularia) distant phacelia (Phacelia distans) fivespot (Nemophila maculata) flatspine stickseed (Lappula occidentalis) Franciscan bluebells (Mertensia franciscana) Frémont's phacelia (Phacelia fremontii) fulvous popcornflower (Plagiobothrys fulvus) giant-trumpets (Macromeria viridiflora = Lithospermum macromeria) gravelbar cryptantha (Cryptantha decipiens) green stoneseed (Lithospermum viride) Guadalupe cryptantha (Cryptantha maritima) hiddenflower phacelia (Phacelia cryptantha) Jamaicanweed (Nama jamaicense) Key West heliotrope (Heliotropium fruticosum) lacy phacelia (Phacelia tanacetifolia) largeflower phacelia (Phacelia grandiflora) limestone phacelia (Phacelia affinis) Menzies' fiddleneck (Amsinckia menziesii) mountain balm (Eriodictyon trichocalyx) narrowleaf yerba santa (Eriodictyon angustifolium) Palmer's grapplinghook (Harpagonella palmeri) palo de asta (Cordia sonorae) Panamint cryptantha (Cryptantha angustifolia) pedicellate phacelia (Phacelia pedicellata) Pringle's popcornflower (Plagiobothrys pringlei) salt heliotrope (Heliotropium curassavicum) sandfood (Pholisma sonorae) scorpion's tail (Heliotropium angiospermum) skyblue phacelia (Phacelia caerulea) sleeping popcornflower (Plagiobothrys hispidulus) small-leaf geigertree (Cordia parvifolia) smooththroat stoneseed (Lithospermum cobrense) spotted hideseed (Eucrypta chrysanthemifolia) tatachinole (Tournefortia hartwegiana) twining soldierbush (Tournefortia volubilis) valley popcornflower (Plagiobothrys canescens) violincillo (Heliotropium macrostachyum) whitewhisker fiddleleaf (Nama undulata) wingnut cryptantha (Cryptantha pterocarya) Brassicaceae alpine pennycress (Noccaea