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

388. Astragalus dilutus Bunge, Delect. Sem. Horti Bot. Dor­pat. 1840: 7. 1840.

浅黄耆 qian huang qi

Plants 3-10 cm tall, acaulescent, caespitose, with mostly ± symmetrically medifixed, appressed to subappressed hairs 0.8-1.5 mm. Leaves 2-7 cm; stipules 3-4 mm, adnate to petiole for ca. 1 mm, densely covered with subappressed white hairs; peti­ole 1-2.5 cm, like rachis densely hairy; leaflets in 4-6 pairs, 4-8(-12) × 2-4(-5) mm, very densely covered on both sur­faces with subappressed hairs. Racemes subspherical to ovoid, densely 8-15-flowered; peduncle 1-7(-10) cm, densely white hairy, toward raceme with black hairs mixed in; bracts 3-5 mm, covered with partly strongly asymmetrically bifurcate white hairs especially at margins. Calyx at anthesis tubular, 9-10 mm, loosely covered with appressed black and white hairs; teeth 1-1.5 mm; fruiting calyx slightly elongated, up to 12 mm, inflated ellipsoid; teeth up to 2 mm. Petals pale purplish to yellowish with purple keel; standard elliptic, 17-20 × 5-6 mm, dis­tinctly emarginate; wings 16-19 mm; keel 13-15 mm. Leg­umes included in calyx, subsessile, 8-10 mm, 3-3.5 mm high and 1.5-2 mm wide, with a beak ca. 1 mm, 2-locular; valves rather densely covered with strongly asymmetrically bifurcate, spreading, white hairs up to 2 mm.

Xinjiang [Mongolia, Russia (Siberia)].


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