纹茎黄耆 wen jing huang qi

Astragalus leptostachys Pallas.

Plants 20-80 cm tall, sparsely hairy; hairs mostly strongly asymmetrically bifurcate to subbasifixed, appressed, 0.3-0.8 mm. Stems mostly several, erect, with numerous non-flowering branches in leaf axils, sparsely to loosely hairy, sometimes gla­brous. Leaves 4-8 cm, subsessile; stipules 3-4 mm, those on lateral branches shorter, lower ones shortly to distinctly connate behind stem, upper ones free, sparsely hairy or glabrous; rachis hairy like stem; leaflets in leaves of main stem in 8-11 pairs, linear to narrowly oblong, 10-25 × 1-4(-7) mm, those at lateral branches mostly shorter and narrower, glabrous or abaxially sometimes with scattered appressed white hairs. Racemes 3-6 cm, remotely 6-20-flowered; peduncle 2.5-4 cm, sparsely covered with white and black hairs 0.2-0.3 mm; bracts 1.5-3 mm, sparsely black ciliate. Calyx 3(-4) mm, sparsely covered with black and sometimes also with some white hairs up to 0.3 mm; teeth linear, 0.8-1.2 mm. Petals pale violet; standard ellip­tic to rhombic-ovate, 6.5-8 × 4-4.5 mm, apex deeply incised; wings 5-7 mm; keel 4.5-5 mm. Legumes subsessile, obliquely ascending, straight, 9-11 mm, 2-3 mm high and 1.5-2 mm wide, subtriquetrous in cross section, subacute, nearly 1-locular to slightly incompletely 2-locular; valves thin, sparsely covered with appressed white or predominantly black hairs up to 0.5 mm.

Gravelly steppes, moist meadows, saline soil. Gansu, Nei Mongol, Xinjiang [Kazakhstan, Mongolia, Russia (Siberia); Europe].