序尾黄耆 xu wei huang qi

Astragalus lagocephalus Fischer & C. A. Meyer.

Plants 30-40 cm tall. Stem 4-6 mm thick, glabrous or sparsely spreading hairy. Leaves 10-25 cm; stipules 10-20 mm, ciliate; petiole 2-3 cm, like rachis loosely ± spreading hairy; leaflets in 12-17 pairs, widely ovate to elliptic, 8-25 × 5-20 mm, abaxially sparsely or rarely to densely appressed hairy, adaxially glabrous, apex rounded to retuse. Racemes subsessile or with a peduncle up to 2 cm, ovoid, 4-6 × 3-5 cm; bracts 10-20 mm, hairy. Calyx 15-23 mm, slightly inflated, spreading hairy; teeth 8-11 mm. Petals yellow, glabrous; standard elliptic, 20-28 × 9-11 mm, apex emarginate; wings 18-26 mm; keel 17-25 mm. Legumes ovoid, ca. 10 mm, ca. 6 mm high; valves slightly wrinkled, sparsely hairy.

W Xinjiang [Kazakhstan, Russia (Siberia); Europe].