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FOC | Family List | FOC Vol. 10 | Fabaceae | Fabaceae Tribe GALEGEAE

57. Astragalus sect. Cysticalyx Bunge, Mém. Acad. Imp. Sci. Saint Pétersbourg, sér. 7. 11(16): 135. 1868.

囊萼组 nang e zu

Plants subshrubby, with well-developed stems; hairs bifurcate. Stipules adnate to petiole, otherwise free, rarely lower ones vaginate-connate only at base. Inflorescences capitate to subumbellate, with a rather long peduncle. Bracteoles absent. Calyx tubular at beginning of anthesis, soon bladderlike inflated, enclosing legume. Petals yellow. Legumes sessile, 2-locular or rarely nearly 1-locular, covered with spreading hairs.

Seventeen species: China, Mongolia; C Asia; eight species (one endemic) in China.

1 Stem with only black hairs.   379 A. tyttocarpus
+ Stem with white or white and black hairs   (2)
2 (1) Calyx covered with subappressed hairs; standard 15-16 mm.   378 A. scleropodius
+ Calyx covered with ascending or mainly spreading hairs   (3)
3 (2) Leaflets adaxially glabrous, abaxially with scattered hairs only; peduncles with few scattered hairs; calyx teeth 4-5 mm.   373 A. cysticalyx
+ At least some leaflets hairy adaxially, all sparsely to rather densely hairy abaxially; peduncles mostly distinctly hairy; calyx teeth 2-3 mm   (4)
4 (3) Fruiting calyx 12-13 mm, covered with symmetrically to strongly asymmetrically bifurcate, ascending, predominantly black hairs; standard 16-18 mm; legumes covered with spreading predominantly black hairs ca. 1 mm, without distinctly shorter hairs.   377 A. majevskianus
+ Fruiting calyx 14 mm or longer, covered with strongly asymmetrically to basifixed, predominantly longer white hairs and with distinctly shorter black hairs; standard mostly distinctly longer; legumes covered with predominantly white or golden yellowish hairs and with or without shorter black hairs   (5)
5 (4) Leaflets elliptic, 10-20 × 4-11 mm; longer white calyx hairs ascending; standard narrowly oblong, 17-25 × ca. 6 mm, constricted in middle.   374 A. dendroides
+ Leaflets distinctly relatively narrower; longer white calyx hairs at least partly spreading; standard obovate, if narrowly oblong, then not constricted   (6)
6 (5) Leaflets in 3 or 4 pairs, narrowly elliptic, 10-35 × 4-10 mm; peduncles 3-5 cm, sparsely white hairy to subglabrous; standard obovate, 20-26 × 8-10 mm; legumes villous with long, golden yellowish hairs, on ventral side with shorter black hairs mixed in.   380 A. xanthotrichos
+ Leaflets in 4-7 pairs, mostly linear; peduncles 9-15 cm, ± densely hairy; standard shorter; legumes (ovary) with white hairs   (7)
7 (6) Leaflets narrowly linear, 10-20 × 1-1.5 mm; standard narrowly oblong, ca. 19 × 4 mm; wing limbs obtuse.   375 A. gongliuensis
+ Leaflets linear to very narrowly elliptic, 13-22 × 2-4 mm; standard obovate, constricted below middle, ca. 20 × 6 mm; wing limbs obliquely emarginate.   376 A. leucocladus


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