Acalypha neomexicana. NEW MEXICO COPPERLEAF. Annual. Reported from Yavapai County, 2500-7500 feet [McD].
Argythamnia claryana (=Ditaxis adenophora misapplied). DESERT SILVERBUSH. Perennial. Reported from near the mouth of Bill Williams River, southwestern Mohave County [McD].
Argythamnia cyanophylla (=Ditaxis cyanophylla). CHARLESTON MOUNTAIN SILVERBUSH. Perennial. Mohave, Coconino, and Apache counties, 6000-6500 feet [McD].
Argythamnia lanceolata (=Ditaxis lanceolata). NARROWLEAF SILVERBUSH. Shrub. Reported from southern Yavapai County, at ca. 3000 feet [McD].
Argythamnia mercurialina var. mercurialina (=Ditaxis mercurialina). TALL SILVERBUSH. Perennial. Reported from Fort Apache, southern Navajo County, at ca. 5600 feet [McD].
Argythamnia neomexicana (=Ditaxis neomexicana). NEW MEXICO SILVERBUSH. Annual or perennial. Reported from Mohave County, and from Grand Canyon in Coconino County, 1000-4000 feet [McD].
Bernardia incana. HOARY MYRTLECROTON. Shrub. Mohave County, and in Grand Canyon and Havasu Canyon of Coconino County, 1500-5500 feet [McD].
Chamaesyce abramsiana (=Euphorbia abramsiana). ABRAMS' SANDMAT. Annual. Reported from Yavapai County, 3000 feet or lower [McD].
Chamaesyce albomarginata (=Euphorbia albomarginata). WHITEMARGIN SANDMAT. Perennial. Throughout region at 1000-7500 feet [McD].
Chamaesyce arizonica (=Euphorbia arizonica). ARIZONA SANDMAT. Perennial. Reported from Yucca southward in Mohave County and from Grand Canyon in Coconino County, 1000-4000 feet [McD].
Chamaesyce capitellata (=Euphorbia capitellata). HEAD SANDMAT. Perennial. Yavapai County, 5100 feet and lower, probably elsewhere in the region [McD].
Chamaesyce dioica (=Euphorbia indivisa). ROYAL SANDMAT. Annual. Reported from Yavapai County, 3000-5000 feet [McD].
Chamaesyce fendleri (=Euphorbia fendleri). FENDLER'S SANDMAT. Perennial. Throughout region, 4000-7500 feet [McD].
Chamaesyce florida (=Euphorbia florida). CHIRICAHUA MOUNTAIN SANDMAT. Annual. Reported from Yavapai County, 5000 feet or lower [McD].
Chamaesyce glyptosperma (=Euphorbia glyptosperma). RIBSEED SANDMAT. Annual. Reported from Coconino, Navajo, and Apache counties, 5000-7500 feet [McD].
Chamaesyce hyssopifolia (=Euphorbia hyssopifolia). HYSSOPLEAF SANDMAT. Annual. Reported from Yavapai County, 1000-6000 feet [McD].
Chamaesyce melanadenia (=Euphorbia melanadenia). SQUAW SANDMAT. Perennial. Mohave and Yavapai counties, Grand Canyon of Coconino County, White Mountains of Apache County, 800-5000 feet [McD].
Chamaesyce micromera (=Euphorbia micromera). SONORAN SANDMAT. Annual. Reported from Yavapai, Coconino, and Navajo counties, 3000-5000 feet [McD].
Chamaesyce ocellata ssp. arenicola (=Euphorbia ocellata var. arenicola). CONTURA CREEK SANDMAT. Annual. Reported from near Virgin River in northwestern Mohave County, ca. 1500 feet [McD].
Chamaesyce parryi (=Euphorbia parryi). PARRY'S SANDMAT. Annual. Throughout region at 1500-6000 feet [McD].
Chamaesyce pediculifera (=Euphorbia pediculifera). CARRIZO MOUNTAIN SANDMAT. Perennial. Reported from southern Yavapai County, 4500 feet or lower [McD].
Chamaesyce polycarpa (=Euphorbia polycarpa; Euphorbia polycarpa var. hirtella). SMALLSEED SANDMAT. Perennial. Mohave and southern Yavapai counties, in Grand Canyon in Coconino County, 800-3500 feet [McD].
Chamaesyce revoluta (=Euphorbia revoluta). THREADSTEM SANDMAT. Annual. Mohave and Coconino counties, 3000-6000 feet [McD].
Chamaesyce serpyllifolia ssp. serpyllifolia (=Euphorbia serpyllifolia). THYMELEAF SANDMAT. Annual. Throughout region at 3000-7000 feet [McD].
Chamaesyce serrula (=Euphorbia serrula). SAWTOOTH SANDMAT. Annual. Reported from Peach Springs in Mohave County, at ca. 4800 feet [McD].
Chamaesyce setiloba (=Euphorbia setiloba). YUMA SANDMAT. Annual. Mohave County, 800-5000 feet [McD].
Chamaesyce vermiculata (=Euphorbia vermiculata). WORMSEED SANDMAT. Annual. Southeastern Yavapai County, southern Navajo and Apache counties, 6000-7500 feet [McD].
Croton californicus var. californicus (=Croton longipes). CALIFORNIA CROT0N. Perennial. Extreme northwestern Mohave County [McD].
Croton texensis. DOVE WEED. SKUNK WEED. TEXAS CROTON. Annual. Yavapai, Coconino, Navajo, and Apache counties [McD].
Euphorbia aaron-rossii. ROSS SPURGE. MARBLE CANYON SPURGE. Perennial. Coconino County, Colorado River corridor: Marble Canyon, Litle Colorado River drainage; Forster Canyon, 2100-3300 feet [ARPC].
Euphorbia bilobata. BLACKSEED SPURGE. Annual. Reported from Yavapai County, 3500-6000 feet [McD].
Euphorbia brachycera (=Euphorbia lurida; Euphorbia odontadenia; Euphorbia robusta). HORNED SPURGE. Perennial. Throughout region, but apparently most common in Coconino County, 3500-7500 feet [McD].
Euphorbia chamaesula. MOUNTAIN SPURGE. Perennial. Coconino, Navajo, and Apache counties, probably also Yavapai County, 5500-8500 feet [McD].
Euphorbia cuphosperma (=Euphorbia dentata var. cuphosperma). Annual. Southern Yavapai and Apache counties, 3000-8000 feet, intergrades with Euphorbia dentata [McD].
Euphorbia dentata. TOOTHED SOURGE. Annual. Southrn Yavapai and Apache counties, 3000-8000 feet [McD].
Euphorbia exstipulata. SQUARESEED SPURGE. Annual. Reported from Mohave, Yavapai, and Coconino counties, 4000-6000 feet [McD].
Euphorbia incisa var. incisa. MOJAVE SPURGE. Perennial. Mohave, Yavapai, Coconino, and Navajo counties, 3000-9000 feet [McD].
Euphorbia incisa var. mollis. MOJAVE SPURGE. Perennial. Yavapai County [McD].
Euphorbia palmeri var. palmeri. WOODLAND SPURGE. Perennial. Mohave, Yavapai, and Coconino counties, 4000-8000 feet [McD].
Euphorbia palmeri var. subpubens. WOODLAND SPURGE. Perennial. ". . . has about the same range as the species and probably intergrades with it." [McD].
Euphorbia spathulata (=Euphorbia alta). WARTY SPURGE. Annual. Yavapai County and White Mountains of Apache County, 3500-8000 feet [McD].
Jatropha macrorhiza var. septemfida. RAGGED NETTLESPURGE. Perennial. Reported from McNary, Apache County at ca. 7200 feet [McD].
Reverchonia arenaria. SAND REVERCHONIA. Annual. Leupp in eastern Coconino County, Hopi Reservation in Navajo County, 3000-6000 feet [McD].
Ricinus communis. CASTORBEAN. Shrub. Eastern Yavapai County [McD].
Stillingia linearifolia. QUEEN'S-ROOT. Perennial. Reported from Mohave County, 800-2000 feet [McD].
Tetracoccus hallii. HALL'S SHRUBBY-SPURGE. Shrub. Reported from Rawhide Mountains, southern Mohave County, ca. 2500 feet [McD].
Tragia ramosa (=Tragia stylaris). BRANCHED NOSEBURN. Perennial. Throughout region at 2500-7400 feet [McD].
This page last revised 9 April 2009.
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