Plant: perennial herb, tall, stout; stems erect, branching from the upper nodes, to 150 cm tall, finely pubescent in lines above the petioles; milky sap Leaves: opposite, the petioles 3-8 mm long, the blades linear-lanceolate to narrowly elliptic- or oblong-lanceolate, 7-15 cm long, 5-10 mm broad, attenuate at apex, attenuate to abruptly acute at base, sparsely pubescent above and on the veins below INFLORESCENCE: UMBELS lateral in the upper portion of the stem, typically paired at the upper nodes, finely pubescent, ca. 3 cm broad, the peduncles ca. 4 cm long Flowers: small; calyx lobes ca. 2 mm long; corolla bright purple-pink, the lobes ca. 5 mm long; hoods drying white, erect-ascending, ovoid-oblong, 2.5-3 mm long, 1.3-1.6 mm broad along the sloping apex, about as long as the gynostegium, obtuse-rounded above, the horns digitate, attached near the base of the hoods, exserted ca. 1.5 mm and arching over the stigma head; anther wings 1.6-1.7 mm long; corpusculum ca. 0.3 mm long, the pollinia ca. 1 mm long Fruit: FOLLICLES erect on erect pedicels, 6-7 cm long Misc: wet, flat, grassy meadow; 1500 m (5000 ft); Aug REFERENCES: Sundell, Eric. 1994. Asclepiadaceae. J. Ariz. – Nev. Acad. Sci. Volume 27, 169-187.