兔尾黄耆 tu wei huang qi

Astragalus gobi-altaicus N. Ulziykhutag; A. lagurus Pal­las; A. lupulinus Pallas var. laguroides (Pallas) Basilevskaja.

Plants 5-16(-20) cm tall, acaulescent or nearly so, vege­tative parts covered with medifixed, appressed, white hairs 0.8-1.1 mm. Stems, if present, up to 1.5 cm, densely hairy. Leaves 3-14 cm; stipules 6-7(-10) mm, adnate to petiole for 2(-3) mm, hairy; petiole 1.5-5 cm, like rachis densely to rather densely hairy; leaflets in 3-5(-8) pairs, in basal leaves often only in 1 or 2 pairs, 8-25 × 3-8 mm, both surfaces rather densely hairy, apex acute. Racemes ovoid, 2-6 cm, densely many flowered; peduncle 2-11 cm, rather densely covered with symmetrically or asymmetrically bifurcate, appressed to subap­pressed, white hairs 0.4-1 mm, toward raceme sometimes also with some black hairs mixed in; bracts 5-10 mm, covered with asymmetrically bifurcate, at margins with basifixed, white hairs. Calyx at anthesis tubular, soon becoming inflated ovoid, 11-14 mm, loosely to rather densely covered with asymmetrically bi­furcate to basifixed, tangled, spreading, white hairs 1-2 mm, with some black hairs mixed in; teeth 3-6 mm. Petals violet; standard narrowly obovate, 17-20 × 6-7 mm, mostly slightly constricted in middle, apex emarginate; wings 14-17 mm; keel 13-15 mm. Legumes included in calyx, sessile, oblong, 7-8 mm, with a hooked beak ca. 1 mm, 1-locular; valves covered with spreading white hairs.

Xinjiang [Mongolia, Russia (Siberia)].