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

151. Astragalus thomsonii Podlech, Sendtnera. 6: 140. 1999.

汤母森黄耆 tang mu sen huang qi

Plants up to 35 cm tall, covered with hairs 0.2-0.5 mm. Stems mostly several, erect, loosely covered with subappressed to ascending white hairs. Leaves 2.5-6 cm, upper ones often sessile; stipules 3-4 mm, lower ones high connate behind stem, upper ones only shortly connate or free, glabrous; petiole of lower leaves 1-3 cm, like rachis sparsely subappressed white hairy; leaflets in 5 or 6 pairs, narrowly elliptic, 6-16 × 2-4 mm, abaxially when young densely and with age loosely appressed white hairy, adaxially glabrous, apex narrowly rounded to sub­acute. Racemes ovoid, densely many flowered; peduncle 5-10 cm, sparsely to loosely covered with appressed white hairs, toward raceme hairs increasingly ascending and black; bracts 2-3 mm, white and black hairy. Calyx 3-3.5 mm, densely ap­pressed white and black hairy; teeth 1-1.5 mm. Standard widely elliptic, 6-8 × 4-5 mm, apex emarginate; wings 5-6 mm; keel 4-4.5 mm. Legumes 3.5-4 mm, ca. 2 mm high and 4-5 mm wide, obtriangular to nearly globose as seen from dorsal side, cuneate at base, widely truncate at apex with persistent style, widely flattened ventrally, narrowly and deeply grooved dor­sally, 2-locular; valves with conspicuous transverse ridges at dorsal side, covered with subappressed white and predominantly black hairs. Seeds 2.

3600-5300 m. Xizang [India, Kashmir, Nepal].


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