Plant: perennial herb; stems erect, unbranched, 40-150 cm tall, shaggy pilose Leaves: opposite, subsessile, the petioles 2-5 mm long, the blades ovate-elliptic, 6-25 cm long, 3-16 cm broad, rounded to shallowly cordate and more or less clasping at the base, rounded to truncate or retuse at the apex, apiculate, pilose to pubescent beneath, sparsely so above, the margins ciliate INFLORESCENCE: UMBELS subterminal at the uppermost nodes, 5-8 cm broad, the peduncles 3-12 cm long Flowers: large; calyx lobes 4-5 mm long; corolla green to purplish outside, greenish inside, the lobes 9-11 mm long; hoods pale pink, erect-spreading, oblong-quadrate in the lower portion, more or less recurved-divergent at the middle, attenuate to the apex, 7-8 mm long along the dorsal surface, 5-8 mm broad at the top, 4-6 mm longer than the gynostegium, the horns radially flat, attached at the base of the hoods, oblong, erect, exserted ca. 1 mm; anther wings 2.5-2.6 mm long; corpusculum 0.4-0.5 mm long, the pollinia 1.6 mm long Fruit: FOLLICLES erect on deflexed pedicels, 9-12 cm long Misc: Canyons and roadsides, open woodlands, mts; 1600-2150 m (5300-7000 ft); Jul-Aug REFERENCES: Sundell, Eric. 1994. Asclepiadaceae. J. Ariz. – Nev. Acad. Sci. Volume 27, 169-187.