Plant: perennial herb; vegetative parts sparsely to densely covered with short curly hairs; stems several to many from the root crown, loosely ascending to horizontally spreading, sparingly branched below, 10-20 cm long; milky sap Leaves: mostly erect, subopposite to irregularly alternate, subsessile, the petioles 1-3 mm long, the blades ovate to mostly lanceolate or oblong-linear, becoming more or less narrower upwards, 1-6 cm long, 5-25 mm broad, long attenuate, acute to obtuse apically, acute to obtuse or rounded at the base, the margins short woolly, the upper surface glabrous or nearly so, the lower surface glabrate, pubescent or sparsely short woolly INFLORESCENCE: UMBELS solitary and terminal on the longer branches, sessile, more or less closely subtended by 1-4 leaflike bracts, 2-5 cm broad Flowers: small; calyx lobes ca. 3 mm long; corolla greenish to purplish, the lobes 4-6 mm long; hoods mostly white to yellow, quite variable in form, erect-ascending to divergent, narrowly to very broadly obovoid to rarely somewhat oblong, widening upward to a truncate or oblique rim, mostly broader than long, 2.2-4.2 mm long along the dorsal surface, 1.2-3.8 mm broad across the top, as long as to ca. 1 mm longer than the gynostegium, the horns attached near the middle of the hoods, radially flat, incurved, exserted 0.5-2 mm; anther wings 1.2-1.6 mm long; corpusculum 0.3-0.4 mm long, the pollinia 0.8-1 mm long Fruit: FOLLICLES erect on deflexed to spreading pedicels, 3.5-6 cm long Misc: Sandy desert scrub, grassland, oak and pine woodland; 1150-2200 m (3700-7300 ft); Apr-Jul REFERENCES: Sundell, Eric. 1994. Asclepiadaceae. J. Ariz. - Nev. Acad. Sci. Volume 27, 169-187.