Plant: perenial herbacious vine; stems canescent, densely short-pilose; milky sap

Leaves: linear to narrowly lanceolate, obtuse to attenuate at the base, 0.8-4.5 cm long, the petioles indistinct to 5(-7) mm long

INFLORESCENCE: UMBELS 6-18 flowered, the peduncles ca. 1-6 cm long

Flowers: ca. 4 mm long; calyx lobes ca. 3 mm long; corolla broadly cup-shaped to rotate, cream colored to pink or purplish, short pilose outside, glabrous to minutely pubescent inside, the tube ca. 2 mm long, the lobes triangular-ovate, ca. 4 mm long; crown ring adnate to the base of the vesicles, these ca. 1.5 mm long; column ca. 0.5 mm high beneath the anther wings, these 0.8-1 mm long; corpusculum ca. 0.25 mm long, the pollinia 0.4-0.5 mm long

Fruit: FOLLICLES single or paired, narrowly lanceolate, attenuate, 3-6 cm long, canescent and short pilose

Misc: Desert washes, lake shores, roadsides; 150-900 m (500-3000 ft); Feb-May

REFERENCES: Sundell, Eric. 1994. Asclepiadaceae. J. Ariz. - Nev. Acad. Sci. Volume 27, 169-187.