Psorothamnus scoparius (A. Gray) Rydb.

Psorothamnus scoparius (A. Gray) Rydberg
Dalea scoparia A. Gray, Mem. Am. Acad. II. 4: 32. 1849. Parosela scoparia A. Heller, Cat. N. Am. PI. ed. 2. 7. 1900.
A shrub, 0.5 m. high or more, with ascending canescent and conspicuously glandularpustulate branches; leaves simple, spatulate-linear or oblanceolate, 1 cm. long or less, canescent and glandular-dotted; peduncles 2-7 cm. long; spikes subglobose or oblong, 12-15 mm. broad, dense; bracts lanceolate, 2 mm. long; calyx-tube turbinate, strongly 10-ribbed, with a row of 2-4 glands in each interval, 2.5 mm. long, white-villous; lobes triangular, 1 mm. long; corolla dark-blue; blade of the banner broadly oval, subcordate at the base and retuse at the apex, usually with a single gland near the apex, the claw 2.5 mm. long; blades of the wings oblong, with a rounded basal lobe, 5 mm. long, those of the keel-petals broadly obliquely obovate, 5 mm. long, the claws of the wings and keel-petals 2 mm. long; pod obliquely obovate, pubescent and glandular-dotted, glabrous only at the very base; body about equaling the calyx.
Type locality: Jornado del Muerto, New Mexico. Distribution: New Mexico, Chihuahua, and Coahuila.