亚东膨果豆 ya dong peng guo dou

Astragalus donianus Candolle, Prodr. 2: 283. 1825; A. monanthus K. T. Fu; A. prattii N. D. Simpson var. uniflorus E. Peter; A. pycnorrhizus Wallich ex Bentham; A. yatungensis C. C. Ni & P. C. Li.

Plants creeping to prostrate. Stems 15-44 cm, in basal part glabrous to sparsely and in upper part loosely or more rarely rather densely covered with appressed white or white and black hairs 0.1-0.2 mm. Leaves 1.5-5 cm; stipules 1-3 mm, free or in front of petiole shortly connate, lower and middle ones 1/2 to completely embracing stem but not connate, at margins and often also elsewhere loosely hairy; petiole short, rachis loosely hairy like stem; leaflets in 4-8 pairs, 2-7(-9) × 1.5-4 mm, emarginate, abaxially at first rather densely appressed hairy, be­coming loosely hairy with age, hairs ca. 0.3 mm, adaxially gla­brous. Racemes short, 1-3(-5)-flowered; peduncle 1.5-6 cm, loosely white and black hairy; bracts 1-4 mm, sparsely hairy. Bracteoles 1-3 mm. Calyx 5.5-7.5 mm, loosely to rather densely covered with ± ascending white and black hairs 0.2-0.5 mm; teeth 2-4.5 mm. Petals blue-violet to purple or dark red; standard orbicular to transversely elliptic, 13-17 × 11-13.5(-15) mm; wings 12-16 mm; keel 12-15(-16) mm. Leg­umes with a stipe 2-3 mm, 15-30 mm, (5-)6-8(-9.5) mm high, with a beak 2-3 mm, 1-locular, at first densely, later loosely, shortly, white and blackish or only blackish hairy.

Xizang, Yunnan [Bhutan, India, Nepal].