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Wasowski, Sally and Andy
Asclepias subulata Dcne.
Rush milkweed, Desert milkweed, Ajamete
USDA Symbol: ASSU
USDA Native Status: Native to U.S.
Like many desert perennials, this shrubby, leafless milkweed bears leaves only after rain. The greenish-white, 3-4 1/2 ft. stems occur in clusters. Whitish-green flowers bloom in terminal clusters and are followed by narrow, milkweed pods.
Plant CharacteristicsDuration: Perennial Habit: Herb Root Type: Tap Size Notes:
4 feet spread (1.2 m), 3 feet wide Flower:
Fruit: Size Class:
Bloom InformationBloom Color: White , Yellow
Bloom Time: Apr , May , Jun , Jul , Aug , Sep , Oct , Nov , Dec
AZ , CA , NV Native Distribution:
S. AZ, s.e. CA & n.w. Mex. Native Habitat:
Dry slopes, mesas, plains & desert washed to 3000 ft. USDA Native Status: L48(N)
Growing ConditionsWater Use: Low
Light Requirement: Sun
Soil Moisture: Dry
Soil Description: Dry, rocky or sandy soils.
Conditions Comments: Not Available
Forage source for the Monarch and Striated Queen Butterflies. Warning:
All plants in the genus
Asclepias are probably somewhat toxic, some fatally so, to both humans and animals. The sap
of some causes skin irritation in humans. Sensitivity to a toxin varies with a personís age, weight, physical condition, and individual susceptibility. Children are most vulnerable because of their curiosity and small size. Toxicity can vary in a plant according to season, the plantís different parts, and its stage of growth; and plants can absorb toxic substances, such as herbicides, pesticides, and pollutants from the water, air, and soil. Attracts:
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Record Modified: 2008-10-19
Research By: TWC Staff