和硕棘豆 he shuo ji dou

Astragalus immersus Baker ex Aitchison, J. Linn. Soc., Bot. 18: 45. 1880; Oxytropis incanescens Freyn; O. pamirica Danguy.

Herbs, 4-11 cm tall, acaulescent, from a multiheaded cau­dex, cushion- or mat-forming, with whitish trichomes. Stipules narrowly triangular, 5-6 × ca. 3 mm, membranous, basally connate. Leaves (0.8-)2-8 cm, 15-21-foliolate; leaflet blades ovate, 1-5 × 1-2 mm, both surfaces with appressed trichomes. Racemes compact, few to ca. 10-flowered; peduncle 4-10 cm, as long as or somewhat longer than leaves, with appressed tri­chomes; bracts triangular, 2-3 × ca. 1 mm, scarious, pubescent. Calyx broadly cylindric, 3-7 × ca. 1 mm, with whitish and blackish trichomes; lobes subulate, 1-3 × ca. 0.5 mm, ca. 1/2 as long as tube. Corolla violet to purple; standard 0.9-1.3 cm, lamina orbicular, apex emarginate; wings ca. 9.5 mm, lamina obovate, apex rounded; keel as long as wings, beak ca. 1 mm. Legume stipitate; stipe 2-3 mm; body cylindric, 10-18 × 4-7 mm, with appressed blackish and whitish trichomes, beak 1-2 mm. Fl. and fr. Aug.

Sunny gravelly hill slopes, alpine meadows; 3600-4200 m. Xin­jiang, Xizang [Afghanistan, Kazakhstan, Kyrgyzstan, Pakistan, Tajiki­stan, Turkmenistan, Uzbekistan; SW Asia].