昌都棘豆 chang du ji dou

Herbs, 7-40 cm tall or more, acaulescent, from a 1-headed or rarely multiheaded caudex. Stipules narrowly triangular, 3.5-8.8 × 2-3 mm, herbaceous, with white trichomes, basally ad­nate to petiole. Leaves 5-8 cm, with white trichomes; leaflets mostly verticillate, in 9 or 11 whorls, 4(-6) blades per whorl or blades opposite apically on rachis; leaflet blades ovate to ob­long-ovate, 4-7 × 1.5-5 mm, both surfaces with white tri­chomes but when young with dense grayish white trichomes, apex acuminate to acute. Racemes elongate, rather lax, many flowered; peduncle 5-13.5 cm, shorter than leaves at anthesis, longer than leaves in fruit; bracts ovate, 4.5-7.5 × 2-3 mm, with white trichomes. Calyx subcylindric, 1.1-1.2 cm, with white trichomes; tube ca. 6 mm; lobes lanceolate, 4-6 × ca. 0.1 mm. Corolla white; standard 1.6-1.9 × 0.6-0.7 cm, lamina broadly obovate and narrowed to base, apex 2-lobed; wings ca. 1.5 cm, lamina obovate, apex emarginate; keel 1.2-1.7 cm, beak 1-1.5 mm. Legume substipitate; body ovoid, ca. 1.6 × 0.7 cm, membranous, with white trichomes, beak ca. 6.5 mm. Fl. Jul-Aug, fr. Jul-Aug.

● Among shrubs on dry and stony slopes; 3200-3300 m. Xizang.