背扁膨果豆 bei bian peng guo dou

Astragalus complanatus Bunge; A. pratensis Ulbrich.

Plants 30-90(-100) cm tall, covered with ± appressed, very short, scalelike, bladderlike hairs up to 0.1 mm. Stems in lower part glabrous, in upper part loosely to rather densely hairy. Leaves 4-11 cm; stipules 1-3 mm, obliquely inserted at stem and sometimes slightly clasping stem, sparsely to loosely hairy; petiole very short, rachis sparsely to loosely white hairy; leaflets in 4-10 pairs, 5-18 × 2.5-11 mm, abaxially sparsely to loosely hairy, adaxially glabrous. Racemes 4-9 cm, remotely 2-7-flowered; peduncle 4-9 cm, sparsely to loosely white hairy; bracts 1-2.5 mm, white and black hairy. Bracteoles 0.5-1 mm. Calyx 4-7 mm, loosely to densely white or black hairy; teeth 2-3.5 mm. Petals yellow to reddish; standard orbicular or trans­versely elliptic, 9-11 × 8-10.5 mm; wings 8-11 mm; keel 9-10 mm. Legumes with a stipe 1-1.5 mm, 30-44 mm, 4-8 mm high, with a straight beak 3-4 mm, 1-locular, loosely to rather densely covered with appressed white or black hairs.

● 1000-1700 m. Gansu, Hebei, Henan, Jiangsu, Jilin, Ningxia, Qinghai, Shaanxi, Shanxi, Sichuan.