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44. Astragalus sect. Erioceras Bunge, Mém. Acad. Imp. Sci. Saint Pétersbourg, sér. 7. 11(16): 109. 1868.
毛角组 mao jiao zu
Plants perennial, with short to rather long stems, rarely subacaulescent, covered with appressed to spreading bifurcate hairs. Leaves imparipinnate; stipules free or adnate to petiole. Racemes with a peduncle equaling or exceeding leaves (rarely very short), short, subumbellate. Bracteoles absent. Calyx tubular to campanulate-tubular. Petals violet, rarely yellow or purple; wing limbs obtuse to emarginate. Legumes sessile to subsessile, linear or narrowly oblong to narrowly ellipsoid, ± curved, rarely straight, grooved or rounded dorsally, 2-locular or nearly so, rarely incompletely 2-locular; valves leathery, covered with ascending to spreading hairs.
Forty-four species: Afghanistan, China, Mongolia, Pakistan; C Asia, SW Asia (Iran), E Europe; six species (four endemic) in China.
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| 1 |
Leaflets in 1-3 pairs |
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(2) |
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Leaflets in at least (3 or)4 pairs but mostly in distinctly more |
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(3) |
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| 2 (1) |
Stipules free from petiole, covered with extremely asymmetrically bifurcate hairs; leaflets 8-23 × 1.5-3.5 mm; bracts 2-4 mm, white and black hairy; calyx 7-10 mm, covered with extremely asymmetrically bifurcate to basifixed, appressed to ascending hairs; legumes 8-11 mm. |
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286 A. habaheensis |
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Stipules adnate to petiole for 0.5-1 mm, covered with slightly asymmetrically bifurcate hairs; leaflets 5-10 × 1.5-3 mm; bracts 1.5-2 mm, predominantly black hairy; calyx 9-11 mm, covered with symmetrically or asymmetrically bifurcate, ascending to spreading hairs; legumes 10-17 mm. |
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285 A. arcuatus |
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| 3 (1) |
Stem, rachis, and peduncle covered with spreading hairs |
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(4) |
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Stem, rachis, and peduncle with ± appressed hairs |
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(5) |
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| 4 (3) |
Plants with a short stem 1-3 cm; stipules 3-9 mm; leaflets in 9-16 pairs; bracts 5-9 mm; calyx 12-15 mm; legumes 12-15 mm. |
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289 A. pilutschensis |
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Plants acaulescent; stipules 1-2 mm; leaflets in 3-7 pairs; bracts 3-4 mm; calyx 11-12 mm; legumes 30-40 mm. |
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290 A. yangchangii |
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| 5 (3) |
Bracts 5-7 mm; calyx 12-13 mm; petals yellow, standard narrowly oblong-ovate, ca. 20 × 4.5 mm. |
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287 A. kuldshensis |
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Bracts ca. 2 mm; calyx at most up to 10 mm; petals purple or violet, standard obovate, 18-22 × ca. 7 mm. |
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288 A. petraeus |
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