西太白黄耆 xi tai bai huang qi

Astragalus monadelphus Bunge subsp. xitaibaicus K. T. Fu, Acta Bot. Boreal.-Occid. Sin. 1(2): 17. 1981.

Plants 12-22 cm tall, totally glabrous with exception of inner side of calyx teeth and legumes. Stems several, up to 4 mm thick. Leaves 4-8 cm; stipules greenish membranous with narrowly hyaline margins, ovate, 12-15 mm; petiole 0.7-2 cm, rachis at base of leaflets mostly with stipel-like entire or fringed linear to narrowly triangular emergences 0.5-2.5 mm and/or with distinctly stalked minute glands; leaflets in 5-7 pairs, ovate to elliptic, 10-18 × 5-9 mm, apex rounded. Racemes 8-11-flowered; peduncle 4-7.5 cm; bracts narrowly ovate, ca. 10 mm. Calyx campanulate, 7.5-9 mm; teeth subulate, 2.5-3 mm, hairy on inner side. Petals yellow; standard obovate, ca. 11 × 5-6 mm; wings ca. 11 mm; keel ca. 10 mm. Stamen tube closed, monadelphous. Legumes with a stipe 5-6 mm, narrowly ellip­soid, ca. 1.5 cm, shortly attenuate at both ends; valves hairy.

● Alpine grasslands; 2800-3300 m. Shaanxi.