Asclepias asperula ssp. asperula (=Asclepias capricornu, apparently misapplied). ANTELOPE HORNS. SPIDER MILKWEED. Perennial. Throughout region at 3000-9000 feet [McD]. Northern Hualapai Mountains, Mohave County [JANAS-24/25].
Asclepias brachystephana. BRACT MILKWEED. Perennial. Reported from Yavapai and Coconino counties, 3500-7000 feet [McD].
Asclepias cryptoceras. PALLID MILKWEED. Perennial. Reported from near Pipe Springs, Mohave County, at 5000 feet [McD].
Asclepias cutleri. CUTLER'S MILKWEED. Perennial. Reported from near Rock Point and 27 miles west of Carrizo, Apache County, at about 5000 feet [McD].
Asclepias engelmanniana. ENGELMANN'S MILKWEED. Perennial. Probably in Yavapai County, found in Coconino and Navajo counties, at 4000-7000 feet [McD].
Asclepias erosa. DESERT MILKWEED. Perennial. Mohave County, at 5000 feet and lower.
Asclepias hallii. HALL'S MILKWEED. Perennial. Reported from San Francisco Mountain at "medium high altitudes" [McD].
Asclepias hypoleuca. MAHOGANY MILKWEED. Perennial. Reported from the White Mountains of Apache County [McD].
Asclepias involucrata. DWARF MILKWEED. Perennial. Throughout region, at 3500-7000 feet [McD].
Asclepias latifolia. BROADLEAF MILKWEED. Perennial. Throughout region at 3000-7000 feet [McD]. Northern Hualapai Mountains, Mohave County [JANAS-24/25].
Asclepias nyctaginifolia. MOJAVE MILKWEED. Perennial. Mohave County, 1500-5000 feet [McD].
Asclepias rusbyi. RUSBY'S MILKWEED. Perennial. Northern Hualapai Mountains, Mohave County [JANAS-24/25].
Asclepias speciosa. SHOWY MILKWEED. Perennial. Coconino, Navajo, and Apache counties, 6000-9000 feet [McD].
Asclepias subulata. RUSH MILKWEED. Perennial. Mohave County, at 3000 feet [McD]. Western Mohave County, along Oatman Road south of Oatman at ca. 1680 feet [LD].
Asclepias subverticillata. POISON MILKWEED. HORSETAIL MILKWEED. Perennial. Throughout region at 2500-8000 feet [McD]. Northern Hualapai Mountains, Mohave County [JANAS-24/25].
Asclepias tuberosa ssp. interior. BUTTERFLYWEED. BUTTERFLY MILKWEED. Perennial. Throughout region at 4000-8000 feet [McD, A. tuberosa]. Coconino to Apache County and south at 4000-8000 feet [K&P]. Northern Hualapai Mountains, Mohave County [JANAS-24/25].
Asclepias uncialis. WHEEL MILKWEED. Perennial. Reported from the White Mountains of Apache County [McD].
Asclepias viridiflora. GREEN COMET MILKWEED. Perennial. Yavapai and Coconino counties, 5500-7000 feet [McD].
Asclepias welshii. WELSH'S MILKWEED. Perennial. Far northern Coconino County, Paria Wilderness, 4700-6250 feet [ARPC].
Cynanchum utahense. UTAH SWALLOW-WORT. Perennial. Reported from Mohave County, at 1000-2000 feet [McD].
Funastrum crispum (=Sarcostemma crispum). WAVYLEAF TWINEVINE. Perennial. Northrn Hualapai Mountains, Mohave County, where rare [JANAS-24/25].
Funastrum cynanchoides ssp. cynanchoides (=Sarcostemma cynanchoides). FRINGED TWINEVINE. Perennial. Mohave, Yavapai, and Coconino counties, at 1500-4500 feet [McD].
Funastrum cynanchoides ssp. heterophyllum (=Sarcostemma cynanchoides ssp. hartwegii). HARTWEG'S TWINEVINE. Perennial. All counties in the range of this work except Apache, 500-5500 (occasionally 6800) feet [JANAS-27(2)].
Funastrum hirtellum (=Sarcostemma hirtellum). HAIRY MILKWEED. Perennial. Western Mohave County, mostly in the valley of the Colorado River at 2000 feet or lower [McD].
Matelea producta. TEXAS MILKVINE. Perennial. Yavapai County at ca. 3600 feet [McD]. An unidentified species of Matelea collected in Northern Hualapai Mountains, Mohave County [JANAS-24/25].
This page revised 23 June 2007.
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