Wikipedia Reference

Growth habit: Forb/herb (Source: USDA Plants)

Duration (Annual/Perennial): Perennial (Source: USDA Plants)

Family: Apocynaceae

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Bloom Color: White , Yellow (Source: wildflower.org)

Bloom Time: Apr , May , Jun , Jul , Aug , Sep , Oct , Nov , Dec (Source: wildflower.org)

USA: AZ , CA , NV (Source: wildflower.org)

Native Distribution: S. AZ, s.e. CA & n.w. Mex. (Source: wildflower.org)

Native Habitat: Dry slopes, mesas, plains & desert washes to 3000 ft. (Source: wildflower.org)

Water Use: Low (Source: wildflower.org)

Light Requirement: Sun (Source: wildflower.org)

Soil Moisture: Dry (Source: wildflower.org)

Soil Description: Dry, rocky or sandy soils. (Source: wildflower.org)

Conditions Comments: Shade tolerant under desert conditions. (Source: wildflower.org)

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Very unique milkweed species, and also the “toughest”, appearing as a bundle of green sticks most of the year. A deep woody taproot and photosynthetic stems alow this plant to survive in intensely hot, xeric conditions. Wide ranging habitat, found in desert washes and rocky hillsides at a variety of elevations. Fast draining soil, hates wet feet.