Dalea erythrorhiza Greenm.

Parosela erythrorhiza (Greenman) Rose, Contr. U. S. Nat Herb. 10: 105. 1906.
Dalea erythrorhiza Greenman, Zoe 5: 185. 1904.
A herbaceous perennial, w T ith a red woody root; stems several from the base, decumbent or prostrate, branched, glabrous, reddish, glandular-tuberculate; leaves spreading, 1.5-6 cm. long; stipules minute, subulate; petioles 1-2 cm. long; rachis sparingly pubescent, conspicuously glandular-tuberculate; leaflets 7-15, obovate, 3-10 mm. long, retuse, glabrous, light-green above and paler and glandular-dotted beneath; peduncles opposite the leaves, 1-4 cm. long; racemes dense, 1-4 cm. long; bracts ovate, acuminate, 7-8 mm. long, glabrous, glandular-dotted, often purplish, scarious-margined, caducous; calyx-tube turbinate, 3 mm. long, strongly 10ribbed; lobes equaling the tube; corolla dark-blue; blade of the banner broadly ovate, subcordate, 3.5 mm. long, the claw 2 mm. long; blades of the wings and keel-petals 3 mm. long, with a rather indistinct rounded basal lobe, the claws 2 mm. long; pod silky-villous.
Type locality: Near the city of Durango. Distribution: Durango, Zacatecas, and Aguascalientes.