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Astragalus tibetanus

Description from Flora of China

Astragalus chadjanensis Franchet; A. narynensis Freyn; A. olufsenii Freyn; A. talievii Širjaev; A. tibetanus var. patentipilus K. T. Fu.

Plants 4-35 cm tall, covered with hairs 0.2-0.5 mm. Stems 2-20 cm, loosely covered with appressed to ascending or even spreading white and partly also black hairs. Leaves 3-11 cm; stipules 4-10 mm, high vaginate-connate, very sparsely white and black hairy and ciliate; petiole 0.5-2 cm, like rachis loosely covered with appressed to ascending hairs; leaflets in 7-14 pairs, ± narrowly elliptic, 5-12 × 2-5 mm, abaxially loosely covered with appressed to ascending white hairs, adaxially gla­brous or sparsely hairy, apex rounded to slightly retuse. Ra­cemes rather densely 4-15-flowered; peduncle 1-10 cm, loosely to densely predominantly black hairy; bracts whitish, 2-3 mm, black hairy. Calyx 7-10 mm, loosely to rather densely ap­pressed black hairy; teeth unequal, 0.5-3 mm. Petals blue-violet or pale lilac but often yellowish when dry; standard elliptic, 16-22 × 6-9 mm, apex incised; wings 15-20 mm; keel 12-15 mm. Legumes with a stipe 2-4 mm, narrowly ellipsoid, 10-15 mm, ca. 3 mm high and wide, obtusely keeled ventrally, widely and deeply grooved dorsally, with a beak 1-2 mm, 2-locular; valves rather densely covered with appressed to spreading mostly pre­dominantly black hairs.

Steppes and open scrub, from the mountain zone to 3900 m. Xin­jiang [Afghanistan, India, Kazakhstan, Kyrgyzstan, Mongolia, Pakistan, Russia (Siberia)].


 

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