马老亚纳棘豆 ma lao ya na ji dou

Herbs, 3-5 cm tall, acaulescent, with sparse white tri­chomes. Stipules ovate to lanceolate, ca. 5 mm, adnate to peti­ole base, margin membranous and ciliate, apex obtuse. Leaves 3-5 cm, 21-25-foliolate; petiole 1-2 cm; leaflet blade oblong-ovate, ca. 3 mm, margin slightly involute, apex obtuse. Ra­cemes compact, 4- or 5-flowered; peduncle shorter than leaves; bracts lanceolate, shorter than calyx. Calyx campanulate, ca. 3 mm; tube ca. 2 mm; lobes lanceolate, ca. 1 mm. Corolla purple to violet; standard ca. 6 mm, lamina ovate; wings as long as standard; keel shorter than wings, apex acutely rostrate. Leg­ume sessile, linear, 1-4 cm, 1-locular, adaxial suture intruded. Fl. and fr. Apr-Jun.

● Stony S-facing slopes; 3800-4600 m. Xizang.