树黄耆 shu huang qi

Plants subshrubby, up to 100 cm tall, covered with mostly appressed and ± medifixed hairs 0.5-1(-1.2) mm. Stems in parts of current year densely to rather densely covered with appressed white hairs, at nodes sometimes also with some black hairs. Leaves 3-9 cm; stipules 5-8(-10) mm, adnate to petiole for 2-3 mm, loosely to rather densely white and black hairy; petiole 0.4-1.2 cm, like rachis loosely white hairy; leaflets in 4 or 5(or 6) pairs, (5-)10-20 × (3-)4-11 mm, abaxially loosely to rather densely hairy, adaxially glabrous or sparsely hairy, rarely loosely appressed hairy. Racemes shortly cylindric, 3-7 cm, densely many flowered; peduncle 3-14 cm, loosely covered with white hairs, toward raceme increasingly black hairy; bracts 4-7(-8) mm, with mostly subbasifixed to basifixed black and sometimes a few white hairs. Calyx 10-13 mm, during anthesis becoming inflated ovoid, at least up to 15 mm and up to 7 mm in diam., loosely to rather densely covered with subbasifixed to basifixed, nearly straight, ascending, white hairs up to 1.8 mm and with much shorter, symmetrically or asymmetrically bifur­cate, flexuous, subappressed, black hairs; teeth 2-2.5 mm. Pet­als greenish yellow; standard oblong, 17-25 × ca. 6 mm, slightly constricted in lower part, apex slightly emarginate; wings 16-18 mm; keel 13-15 mm. Legumes sessile, included in calyx, 9-11 mm, ca. 4 mm high and ca. 2.5 mm wide, with a beak up to 2 mm, 2-locular; valves densely covered with as­cending to spreading, basifixed, white hairs up to 2 mm and sit­ting on indistinct tubercles and with some strongly asymmetri­cally bifurcate, spreading, partly very short, black hairs.

Steppes. Xinjiang [Kazakhstan, Kyrgyzstan, Tajikistan].