大通黄耆 da tong huang qi

Plants ca. 8 cm tall, nearly acaulescent. Stem ca. 1 cm, covered with subappressed white hairs up to 1 mm, partly glabrescent. Leaves 4-6 cm; stipules 5-8 mm, free; petiole 1-2 cm, rachis hairy like stem; leaflets in 10-13 pairs, elliptic, 4-6 × 2-4 mm, both surfaces rather densely covered with subap­pressed white hairs up to 0.7 mm, apex rounded to slightly emarginate. Racemes loosely 4-6-flowered; peduncle 3-5 cm, hairy like stem; bracts narrowly elliptic, 3-4 mm, substipitate, white and black hairy. Calyx 8-9 mm, rather densely covered with white hairs up to 1.5 mm and with appressed, distinctly shorter black hairs; teeth 3-4 mm. Petals yellow; standard ellip­tic, ca. 15 × 7 mm, apex widely emarginate; wings ca. 14 mm; keel ca. 16 mm. Ovary with a glabrous stipe 3-4 mm, densely white and black hairy; style glabrous. Legumes (unripe) with a stipe ca. 4 mm, narrowly ellipsoid, with white hairs up to 2 mm.

● Qinghai.