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FOC | Family List | FOC Vol. 10 | Fabaceae | Astragalus

224. Astragalus rhizanthus Royle ex Bentham in Royle, Ill. Bot. Himal. Mts. 200. 1835.

畸形黄耆 ji xing huang qi

Plants herbaceous or subshrubby, acaulescent to distinctly caulescent, white hairy, inflorescence sometimes also with black hairs. Stems, if present, up to 25 cm, spreading hairy. Leaves 5-12(-17) cm; stipules distinctly longitudinally nerved, adnate to petiole for 3-5 mm, lower ones 5-7 mm, glabrous or ciliate, upper ones 10-15 mm, mostly densely long hairy; petiole 1-3 cm, like rachis loosely to rather densely covered with ascending hairs 1-2(-2.5) mm, sometimes toward end of vegetation period hardening and persistent to next year; leaflets in 6-20(-28) pairs, elliptic to widely elliptic, 4-8(-14) × 2-5(-6) mm, mostly on both surfaces densely subappressed hairy, more rarely adaxially sparsely hairy to glabrous, very rarely hairy only at midvein abaxially, apex subacute to slightly re­tuse. Racemes subsessile (mostly in acaulescent plants) or with a hairy to subglabrous peduncle 0.5-5 cm, loosely 3-5-flow­ered; bracts 8-10 mm, hairy. Calyx 12-14(-16) mm, loosely to densely spreading white or white and black hairy; teeth 5-8 mm. Petals yellow; standard obovate, 18-23 × 8-12 mm, apex emarginate; wings 17-21 mm; keel 14-15 mm. Legumes subsessile, oblong, 10-17(-20) mm, 4-7 mm high and wide, with a straight or curved beak 3-10 mm, 2-locular; valves leathery, loosely to densely covered with spreading hairs.

Subalpine to alpine meadows and stony slopes; 1800-5000 m. Xinjiang, Xizang [Afghanistan, India, Kashmir, Nepal, Pakistan].

1 Leaflets in (12-)15-20(-28) pairs, mostly densely hairy; inflorescence mostly only white hairy; legumes with a beak 3-5 mm.   224a subsp. rhizanthus
+ Leaflets in 6-13 pairs, sparsely hairy to glabrous; inflorescence predominantly black hairy; legumes with a beak up to 10 mm.   224b subsp. candolleanus

Lower Taxa


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