囊萼黄耆 nang e huang qi

Astragalus physocalyx Karelin & Kirilov (1841), not Fischer (1837).

Plants subshrubby, up to 60 cm tall, vegetative parts sparsely covered with ± medifixed, appressed, white hairs 0.5-1 mm. Stems branched, old parts ligneous; stems of current year 7-17 cm, sparsely hairy. Leaves 6-9 cm, subsessile; stipules 5-9 mm, adnate to petiole for 1-2 mm, sparsely covered with appressed, mostly white hairs; rachis sparsely appressed hairy; leaflets in 4 or 5 pairs, 13-35 × 4-8 mm, covered with scattered hairs abaxially, glabrous adaxially. Racemes ovoid, (3.5-)4-6 × ca. 3.5 cm, densely many flowered; peduncle 8-15(-22) cm, with scattered appressed hairs; bracts 5-9 mm, with spreading black hairs. Calyx at anthesis tubular, ca. 12 mm, later enlarged, spherical-ovoid, 13-14 mm, villous, rather densely covered with ± spreading, basifixed, white hairs 1-1.5 mm and toward teeth increasingly covered with distinctly shorter, ± appressed, subbasifixed to strongly asymmetrically bifurcate, black hairs; teeth 4-5 mm. Petals dingy yellow; standard narrowly obovate, 18-20 × 5-6 mm, apex slightly emarginate; wings 19-20 mm; keel 14-17 mm. Legumes included in persistent calyx, sessile, oblong, ca. 10 mm, densely villous with ± spreading white hairs.

Xinjiang [Kazakhstan].