长龙骨黄耆 chang long gu huang qi

Astragalus stenoceras C. A. Meyer var. macranthus Bunge.

Plants 15-22 cm tall, with ± medifixed, appressed hairs 0.4-1.5 mm. Stems mostly several, erect, loosely to rather densely covered with mostly white hairs. Leaves 3-7 cm; stip­ules 2.5-3.5 mm, shortly adnate to petiole, hairy; petiole 1-2.5 cm, with slender rachis hairy like stem; leaflets in 4-7(-9) pairs, 5-12 × 1.5-4 mm, abaxially loosely and adaxially sparsely covered with white hairs 0.8-1.5 mm. Racemes short to subumbellate, 3-5-flowered; peduncle 4-9 cm, loosely hairy like stem; bracts 2-2.5 mm, sparsely mainly black hairy, at margins with subbasifixed hairs. Calyx 11-15 mm, loosely to rather densely covered with predominantly black hairs 0.3-0.5(-0.8) mm; teeth 1.5-2.5 mm. Petals pink; standard obovate, 24-27 × 8-10 mm, apex emarginate, slightly constricted below middle; wings 20-23 mm; keel 18-21 mm. Legumes sessile, obliquely erect or starlike spreading, 25-40 mm, ca. 2 mm high and wide, with a straight beak 1-2 mm; valves densely covered with short, at ventral side predominantly black, at dorsal side predominantly white hairs.

Stony mountain steppes, wastelands; ca. 1000 m. Xinjiang [Ka­zakhstan, Kyrgyzstan, Tajikistan, Uzbekistan].