Asclepias subulata Decne.
Rush milkweed, Desert milkweed, Ajamete
Asclepiadaceae (Milkweed Family)
USDA Symbol: ASSU
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.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Root Type: Tap
Size Notes: 4 feet spread (1.2 m), 3 feet wide
Size Class: 3-6 ft.
Bloom InformationBloom Color: White , Yellow
Bloom Time: Apr , May , Jun , Jul , Aug , Sep , Oct , Nov , Dec
DistributionUSA: AZ , CA , NV
Native Distribution: S. AZ, s.e. CA & n.w. Mex.
Native Habitat: Dry slopes, mesas, plains & desert washed to 3000 ft.
Growing ConditionsWater Use: Low
Light Requirement: Sun
Soil Moisture: Dry
Soil Description: Dry, rocky or sandy soils.
Conditions Comments: Not Available
BenefitUse Wildlife: 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.
Value to Beneficial InsectsSpecial Value to Native Bees
Special Value to Bumble Bees
Special Value to Honey Bees
Supports Conservation Biological Control
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
BibliographyBibref 995 - Native Landscaping from El Paso to L.A. (2000) Wasowski, S. and A. Wasowski
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Recommended Species Lists
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Additional resourcesUSDA: Find Asclepias subulata in USDA Plants
FNA: Find Asclepias subulata in the Flora of North America (if available)
Google: Search Google for Asclepias subulata
MetadataRecord Modified: 2008-10-19
Research By: TWC Staff