1	Standard 6-7 mm		(2)
+	Standard 9-12 mm		(3)
2 (1)	Leaflets 2-4 × 1-2 mm, adaxially hairy toward margins; peduncle only with white hairs; legumes loosely predominantly white hairy.		192 A. orbicularifolius
+	Leaflets 4-8 × 2-3.5 mm, glabrous adaxially; peduncle toward raceme with black hairs; legumes densely black hairy.		191 A. longiscapus
3 (1)	Stipules adnate to petiole for 1-2 mm and connate to each other before petiole further up; leaflets in 8-11 pairs, 4-9 mm; ovary and legumes black hairy.		193 A. rigidulus
+	Stipules not as above; leaflets in at most 8 pairs, up to 5 mm; ovary white hairy or glabrous		(4)
4 (3)	Plants ca. 10 cm tall, with stems up to 4 cm; leaves 3-5 cm; peduncles glabrous; ovary glabrous.		190 A. dingjiensis
+	Plants 1.5-5 cm tall, acaulescent or nearly so; leaves 1-2 cm; peduncles hairy; ovary glabrous or hairy		(5)
5 (4)	Stem, if present, glabrous; leaflets 3-5 × 1-1.5 mm, glabrous or with a few hairs only; peduncle inconspicuous, up to 3 mm, densely black hairy; calyx 3-4 mm, covered with flexuous black hairs up to 0.3 mm; ovary glabrous.		189 A. dickorei
+	Stem, if present, loosely hairy; leaflets 1-3 × 0.5-1.5 mm, adaxially sparsely to loosely hairy, abaxially densely to rather densely hairy; peduncle 3-15 mm, white and black hairy; calyx covered with black hairs 0.1-0.3 mm and with white hairs 0.6-1 mm; ovary white hairy.		188 A. conaensis