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

28. Astragalus sect. Lotidium Bunge, Mém. Acad. Imp. Sci. Saint Pétersbourg, sér. 7. 11(16): 5. 1868.

伞序组 san xu zu

Astragalus sect. Longistipitati Y. C. Ho; A. sect. Umbellati N. D. Simpson.

Plants biennial or perennial, rarely annual, with prostrate to erect or long creeping stems, with short basifixed hairs. Stipules free or shortly adnate to petiole, connate behind stem or not. Flowers pedicellate, umbellate, subumbellate, or in a loose raceme. Petals purplish or rarely white, yellow, or pink; wing limbs mostly obtuse at apex; keel as long as or distinctly longer than wings. Ovary and legumes mostly stipitate; legumes linear, erect, 2-locular or rarely 1-locular.

Thirteen species: China, Japan; 13 species (12 endemic) in China.

1 Whole plant covered with spreading hairs 0.3-0.5(-0.8) mm.   205 A. wushanicus
+ Plant covered with appressed to sometimes slightly ascending hairs (only A. zhouquinus with spreading hairy stem)   (2)
2 (1) Stipules all or at least those of lower leaves behind stem distinctly, often high vaginate-connate   (3)
+ Stipules all free from one another (in A. tungensis stipules in short lateral branches connate)   (7)
3 (2) Keel as long as or longer than standard and distinctly longer than wings; ovary and legumes glabrous or rarely sparsely hairy   (4)
+ Keel distinctly shorter than standard but as long as wings; ovary and legumes hairy   (5)
4 (3) Leaflets hairy adaxially; standard 10-13 mm, wings 9-10 mm, and keel 12-13 mm; ovary and legumes glabrous.   195 A. davidii
+ Leaflets glabrous adaxially; standard 8-10 mm, wings 6-9 mm, and keel 8-10 mm; ovary and legumes glabrous or hairy.   202 A. sutchuenensis
5 (3) Leaflets in 3-5 pairs; peduncles 4-7 cm; bracts linear-acute, 2-3.5 mm; standard ca. 11 × 7-9 mm, suborbicular.   201 A. souliei
+ Leaflets in 5-9 pairs; peduncles 1-3 cm; bracts subulate, 0.5-1 mm; standard 11-12 × 5-6 mm, obovate   (6)
6 (5) Stipules 3-5 mm; leaflets in 8 or 9 pairs, sparsely hairy adaxially, both surfaces very densely spotted with minute dark purplish dots; calyx teeth unequal, short ones ca. 1 mm, longer ones 2-2.2 mm.   206 A. yangtzeanus
+ Stipules ca. 2 mm; leaflets in 5-8 pairs, glabrous adaxially, without purplish dots; calyx teeth unequal, short ones 0.6-0.8 mm, longer ones ca. 1.2 mm.   196 A. fangensis
7 (2) Leaflets in 9-12 pairs; bracts 2-3 mm.   203 A. tungensis
+ Leaflets in at most 9 pairs, but mostly distinctly fewer; bracts up to 1.5 mm   (8)
8 (7) Stems covered with short spreading hairs; leaflets 2-3 × 1.5-2.5 mm; standard 6.5-7 mm.   207 A. zhouquinus
+ Stems appressed hairy or subglabrous to glabrous; leaflets distinctly larger; standard at least 8 mm but mostly distinctly longer   (9)
9 (8) Plants 9-10 cm tall, with an erect stem 2-3 cm, with minute globose hairs in lower part and with appressed hairs 0.2-0.4 mm in upper part; stipules clasping stem but free from each other.   197 A. nankotaizanensis
+ Plants prostrate, with partly creeping stems 15-50 cm, sparsely hairy to subglabrous or glabrous, never with globose hairs; stipules not clasping stem   (10)
10 (9) Stems, rachises, and peduncles covered with very short hairs 0.05-0.1 mm; leaflets abaxially with hairs 0.5-0.7 mm, both surfaces densely spotted with minute dark purple dots; petals all of equal length, ca. 8.5 mm.   204 A. wolungensis
+ Stems, rachises, and peduncles covered with longer hairs 0.1-0.8 mm; leaflets without purple dots; standard and keel of equal length but distinctly longer than wings, if all of nearly same length, then standard ca. 11 mm   (11)
11 (10) Leaflets very narrowly elliptic, 4-9 × 0.5-1.5 mm; standard ca. 7 × 9 mm, limb wider than long, transversely elliptic; style below stigma with a long line of minute hairlets; stems not prostrate, not rooting at nodes.   199 A. sciadophorus
+ Leaflets elliptic, less than 2 × as long as wide, glabrous adaxially; standard with limb always distinctly longer than wide; style below stigma glabrous; stems prostrate, often rooting at nodes   (12)
12 (11) Leaflets with a hairy petiolule 0.5-1 mm, glabrous abaxially or with scattered hairs only; peduncle glabrous; legumes glabrous, with a beak 9-10 mm; stems not rooting at nodes.   198 A. nokoensis
+ Leaflets without a hairy petiolule, sparsely hairy abaxially; peduncle sparsely hairy; legumes mostly hairy, at least when young, with a shorter beak; stems rooting at nodes.   200 A. sinicus


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