Thornbera grayi

Thornbera grayi (Vail) Rydberg
Dalea laevigata A. Gray. PI. Wright. 2: 38. 1853. Not D. laevigata Moc. & Sesse, 1832. Parosela Grayi Vail, Bull. Torrey Club 24: 14. 1897.
A perennial herb, with a woody caudex; stems several, erect, striate, glabrous; leaves 2-4 cm. long, ascending; stipules subulate, 1-2 mm. long; petioles 3-5 mm. long; rachis glabrous, slightly glandular-dotted; stipels wanting; leaflets 35-41, oblong to oval, mucronate, 2-4 mm. long, glabrous, glandular-dotted beneath only; peduncles terminating the stems and branches, 1-5 cm. long; spikes dense, 1-3 cm. long, 8 mm. thick; bracts ovate, acuminate, sparingly glandular-dotted, villous-pilose, subpersistent; calyx-tube 2 mm. long, villous, 10-ribbed, inconspicuously glandular-punctate; lobes deltoid-ovate, acuminate, nearly equaling the tube; corolla white or cream-colored; blade of the banner rounded-ovate, 2 mm. long, the claw 3 mm. long; blades of the other petals distinct, oblong, 2.5 mm. long, the claws very short; pod pubescent and minutely glandular-dotted above, glabrate below.
Type locality: Chiricahui Mountains, Sonora.
Distribution: New Mexico and Arizona to Sonora and Durango.