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46. Astragalus sect. Ammotrophus Bunge, Mém. Acad. Imp. Sci. Saint Pétersbourg, sér. 7. 11(16): 111. 1868.
沙地组 sha di zu
Plants herbaceous or slightly subshrubby, with developed stems covered with minutely warty, medifixed hairs. Stipules whitish hyaline, small, free from petiole to shortly adnate to it, ± high connate behind stem. Inflorescence borne on a long peduncle, a short raceme or umbellate to subumbellate. Bracteoles absent. Calyx tubular, at length slightly inflated, ruptured by legume. Limbs of wings emarginate to bilobed at tip. Legumes subsessile, oblong, compressed laterally, rounded dorsally, 2-locular or nearly so, villous, few seeded.
Seven species: China, Mongolia, Russia (Siberia); C Asia; three species in China.
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| 1 |
Lower stipules connate behind stem, upper ones free; bracts 3-5 mm; calyx 12-16 mm, teeth 2-3 mm; standard 20-26 mm; wing limbs 19-22 mm, slightly emarginate at tip. |
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308 A. megalanthus |
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All stipules distinctly connate behind stem; bracts 1.5-3 mm; calyx mostly 9-10 mm, teeth 1-2 mm; standard 18-21 mm; wing limbs 12-16 mm |
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(2) |
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| 2 (1) |
Leaflets elliptic to ovate, 2-5 × 0.8-3 mm, both surfaces rather densely hairy; calyx covered with medifixed, appressed, white and shorter black hairs; wing limbs deeply bilobed. |
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309 A. saratagius |
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Leaflets widely obovate, 6-12 × 4-12 mm, adaxially glabrous or rarely to loosely hairy; calyx covered with subbasifixed, appressed to ascending, white hairs; wing limbs rounded. |
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307 A. albicans |
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