1	Stems, rachises, and peduncles covered at least partly with ascending to spreading hairs		(2)
+	Stems, rachises, and peduncles with appressed to subappressed hairs or glabrous		(7)
2 (1)	Plants covered with subbasifixed to extremely asymmetrically bifurcate hairs, with a very short obtuse appendix at base; peduncles 1-2 cm; calyx teeth 0.3-0.5 mm; ovary and legumes hairy.		167 A. minutidentatus
+	Plants with basifixed hairs; peduncles and calyx teeth distinctly longer		(3)
3 (2)	Calyx ca. 3 mm; standard ca. 7 mm; ovary and legumes sessile, rather densely white hairy.		163 A. hysophilus
+	Calyx 4-5 mm; standard at least 8 mm but often distinctly longer (up to 11 mm); ovary with a stipe 1-3 mm, sessile only in A. mekongensis		(4)
4 (3)	Stipules 2-3 mm; peduncles, bracts, and calyx only with white hairs; keel 8.5-10 mm, as long as wings.		165 A. maowensis
+	Stipules distinctly longer; peduncles, bracts, and calyx at least partly black hairy; keel up to 7 mm, shorter than wings		(5)
5 (4)	Stipules 4-5 mm, lower ones high vaginate-connate, upper ones free from each other; calyx covered with appressed to ascending black hairs 0.1-0.3 mm, teeth 1-1.5 mm; wing limbs obovate, distinctly widened toward apex; ovary glabrous.		161 A. golmunensis
+	Stipules 6-12 mm, all distinctly vaginate-connate; calyx covered with black and white hairs up to 0.8-1 mm, teeth 2-3 mm; wing limbs narrowly oblong, not widened toward tip; ovary hairy		(6)
6 (5)	Leaflets of main stem leaves in 7 or 8 pairs, adaxially loosely hairy; bracts predominantly white hairy; petals violet; ovary shortly stipitate, white hairy.		171 A. oreocharis
+	Leaflets of main stem leaves in 10-13 pairs, adaxially glabrous or sparsely hairy; bracts black hairy; petals white; ovary and legumes sessile, white and black hairy.		166 A. mekongensis
7 (1)	Leaflets in 11-15 pairs, adaxially glabrous; bracts 1.5-2 mm, predominantly black hairy.		164 A. jiazaensis
+	Leaflets in at most 12 pairs, at least most leaves with distinctly fewer pairs of leaflets, if in some leaves up to 15 pairs, then at least mostly hairy adaxially and bracts white or predominantly white hairy		(8)
8 (7)	Leaflets 1-4(-5) mm		(9)
+	At least most leaflets distinctly longer		(14)
9 (8)	Standard 9-10 mm or longer		(10)
+	Standard at most 8 mm but mostly distinctly shorter		(11)
10 (9)	Plants 2-6 cm tall; stipules 1-2 mm; peduncles ca. 1 cm; racemes 3-6-flowered; petals in life pale yellow; ovary subsessile.		179 A. yangii
+	Plants 10-20 cm tall; stipules 3-5 mm; peduncles up to 15 cm; racemes 10-15-flowered; petals violet; ovary with a stipe 1-2 mm.		170 A. nanjiangianus
11 (9)	Stems, rachises, peduncles, and legumes glabrous.		157 A. baxoiensis
+	Stems, rachises, peduncles, and legumes hairy		(12)
12 (11)	Leaflets hairy adaxially.		169 A. montivagus
+	Leaflets glabrous adaxially		(13)
13 (12)	Leaflets narrowly elliptic, 1-5 × 0.3-1 mm; petals white with violet-tipped keel; legumes incompletely 2-locular.		180 A. yunningensis
+	Leaflets elliptic, 1-4 × 0.6-2 mm; petals blue to purple; legumes 1-locular.		159 A. cobresiiphilus
14 (8)	Plants in vegetative parts completely glabrous.		158 A. blandulus
+	Plants hairy		(15)
15 (14)	Stems, rachises, and peduncles sparsely covered with white and black hairs up to 0.3(-0.4) mm and often also with very short bladderlike-globose hairs 0.05-0.1 mm, sometimes subglabrous.		175 A. sikkimensis
+	Stems, rachises, and peduncles without bladderlike-globose hairs, these elongated, not flattened also if short; peduncles distinctly longer		(16)
16 (15)	Calyx 2.5-3 mm, teeth up to 1 mm.		182 A. zacharensis
+	Calyx at least 3 mm but often longer, at least lower teeth distinctly longer		(17)
17 (16)	Leaflets adaxially sparsely to loosely hairy (only in A. austrotibetanus more often some leaflets glabrous adaxially)		(18)
+	Leaflets adaxially glabrous or sometimes with a few scattered hairs only		(21)
18 (17)	Bracts white ciliate; standard 10-11 mm.		177 A. sungpanensis
+	Bracts white and black hairy; standard 7-9 mm		(19)
19 (18)	Stems and rachises with appressed to ascending hairs 0.5-0.8 mm; stipules 6-9 mm; leaflets up to 14 mm, acute to subobtuse; bracts 3-4 mm, predominantly white hairy; standard limb suborbicular; ovary and legumes sessile.		156 A. austrotibetanus
+	Stems and rachises with appressed hairs 0.2-0.4 mm; stipules up to 5 mm; leaflets up to 10 mm, rounded to emarginate; bracts 2-3 mm, white and black hairy; standard limb narrower, elliptic to obovate; ovary and legumes with a stipe 1-2 mm		(20)
20 (19)	Leaves sessile to subsessile; standard 6-7 mm; legumes incompletely 2-locular.		172 A. polycladus
+	Leaves, at least lower ones, with a petiole 1-2 cm; standard 7-9(-10) mm; legumes 1-locular.		176 A. strictus
21 (17)	Standard 6-7 mm; ovary and legumes sessile to subsessile		(22)
+	Standard 9 mm or longer; ovary and legumes with a stipe 1.5-3.5 mm		(24)
22 (21)	Stipules 2-3 mm; leaves 3-4 cm; leaflets in 4-6 pairs; ovary glabrous.		181 A. yutianensis
+	Stipules 4-9 mm; leaves 5-12 cm; leaflets in 8-12 pairs; ovary white hairy		(23)
23 (22)	Stipules 6-9 mm, all high connate behind stem, sparsely to loosely hairy; petals mauve; standard 6-8 × ca. 5 mm, widely elliptic to transversely elliptic.		178 A. tibeticola
+	Stipules 4-6 mm, upper ones free from each other, glabrous or only sparsely ciliate; petals white, violet tipped; standard 5-7 × 4-4.5 mm, widely obovate.		160 A. euchlorus
24 (21)	Calyx 3-4 mm		(25)
+	Calyx at least 4.5 mm but mostly longer		(26)
25 (24)	Stems 8-20(-30) cm; stipules glabrous or sparsely ciliate; leaflets 4-8(-15) × 1.5-4(-8) mm; legumes with a stipe ca. 3 mm, 7-8 mm, ca. 3 mm high, rather densely black hairy.		162 A. havianus
+	Stems 4-6 cm; stipules sparsely to loosely white and black hairy; leaflets 4-7 × 1.5-3 mm; legumes sessile, 4-5 mm, ca. 1.8 mm high, glabrous.		173 A. praeteritus
26 (24)	Peduncles 0.5-1.2 cm, glabrous or nearly so.		183 A. zayuensis
+	Peduncles at least 3 cm but mostly distinctly longer, distinctly hairy		(27)
27 (26)	Stems and peduncles black hairy; stipules 3-7 mm, glabrous or with a few black or white hairs; bracts white and black ciliate; calyx densely covered with black hairs 0.3-0.5 mm.		174 A. pullus
+	Stems and peduncles predominantly white hairy; stipules 5-10 mm, loosely to rather densely white hairy; bracts loosely predominantly black hairy; calyx loosely covered with black hairs 0.2-0.4 mm and with white hairs 0.5-0.7 mm.		168 A. monbeigii