1	Inner side of calyx tube hairy in upper 1/2		(2)
+	Inner side of calyx tube glabrous		(3)
2 (1)	Petals yellow; leaflets in 3-7 pairs, narrowly to widely elliptic; keel as long as standard.		40 A. tongolensis
+	Petals purplish; leaflets in 2-4 pairs, narrowly elliptic; keel distinctly shorter than standard, (12-)15-16 mm.		30 A. moellendorffii
3 (1)	Ovary and legumes glabrous		(4)
+	Ovary and legumes hairy		(8)
4 (3)	Leaflets in (1 or)2 pairs; calyx 4-5 mm, teeth indistinct or up to 0.3 mm; standard 8-10 mm; keel longer than wings.		24 A. henryi
+	Leaflets in at least 3 pairs but mostly more; calyx at least 5 mm but mostly distinctly longer; standard at least 13 mm but mostly longer; keel shorter than or as long as wings		(5)
5 (4)	Leaf rachis sparsely to loosely covered with appressed to spreading hairs; leaflets in 8-12 pairs.		32 A. mongholicus
+	Leaf rachis glabrous; leaflets in 3-5 pairs		(6)
6 (5)	Calyx 11-12 mm, sparsely to loosely covered with ± spreading brown or blackish hairs; bracts sparsely to loosely white and black hairy; standard limb widely ovate to orbicular, 13-16 mm wide; legumes 30-40(-50) mm, inflated ellipsoid.		17 A. bahrakianus
+	Calyx at most up to 11 mm but mostly shorter, glabrous or appressed white hairy; bracts glabrous or only white hairy; standard limb rhombic to elliptic, up to 12 mm wide; legumes 20-30 mm, strongly compressed laterally (unknown in A. sichuanensis)		(7)
7 (6)	Racemes 6-16 cm, many flowered; bracts glabrous or sparsely ciliate; calyx 6-8 mm, often glabrous; ovary with a stipe 6-8 mm.		15 A. aksuensis
+	Racemes short, 5-10-flowered; bracts densely appressed hairy; calyx 9-11 mm, teeth very short to mostly inconspicuous; ovary with a stipe 12-14 mm.		38 A. sichuanensis
8 (3)	Stems in lower 1/3-1/2 without developed leaves.		36 A. przewalskii
+	Steams leafy throughout		(9)
9 (8)	Leaflets in 8-15 pairs		(10)
+	Leaflets in up to 9 pairs but often in fewer		(14)
10 (9)	Leaflets very narrowly elliptic to narrowly elliptic, 10-17(-20) × 2-6 mm; calyx when young with long white or black hairs, therefore racemes sericeous, with age loosely to rather densely and mostly black hairy; standard 12-13 × 4-4.5 mm, narrowly oblong-elliptic, deeply incised.		22 A. floridulus
+	Leaflets relatively wider; calyx without long white or black hairs and not sericeous when young; standard elliptic to obovate, if narrowly oblong-elliptic, then rounded (in A. degensis)		(11)
11 (10)	Leaflets adaxially sparsely and abaxially loosely hairy; petals dark purple to blackish violet; stem up to 7 mm thick.		35 A. petrovii
+	Leaflets adaxially glabrous, abaxially sparsely hairy; petals yellow or rarely pale lilac or purple; stem up to 3 mm thick		(12)
12 (11)	Calyx ca. 5 mm, white hairy; standard ca. 8 mm; legumes shortly stipitate, densely white hairy.		18 A. changduensis
+	Calyx mostly distinctly longer; standard distinctly longer, at least 11 mm; legumes with a stipe at least 4 mm but mostly longer, ± black hairy		(13)
13 (12)	Plants in vegetative parts furnished with appressed to spreading hairs 1-1.5(-2) mm; leaflets rounded to emarginate; calyx teeth 0.5-1.5 mm; standard 13-20 × 7-9 mm, widely elliptic, emarginate, at base with a long claw; legumes obliquely ellipsoid, 2-3 cm.		32 A. mongholicus
+	Plants in vegetative parts furnished with appressed hairs 0.3-0.6 mm; leaflets acute to emarginate but with a distinct cusp ca. 0.5 mm; calyx teeth ca. 3 mm; standard 11-13 × ca. 5 mm, narrowly oblong-elliptic, rounded at apex, abruptly contracted into a very short claw; legumes ellipsoid, 1.3-1.7 cm.		20 A. degensis
14 (9)	Plants totally glabrous with exception of inner side of calyx teeth; rachis at insertion of leaflets often with simple or divided emergences and or with stalked glands; stamen tube monadelphous.		41 A. xitaibaicus
+	Plants at least in some parts hairy; rachis at insertion without emergences and glands; stamen tube diadelphous or monadelphous		(15)
15 (14)	Lower stipules distinctly vaginate-connate; calyx 1-1.4 cm, teeth 4-7(-8) mm; petals yellow, sometimes violet suffused when dry.		27 A. longilobus
+	All stipules free; calyx and calyx teeth distinctly shorter		(16)
16 (15)	Standard 10-12 mm		(17)
+	Standard distinctly longer, if only 10-12 mm, then stamens monadelphous		(19)
17 (16)	Leaflets glabrous or ciliate; calyx glabrous; petals yellow.		19 A. chilienshanensis
+	Leaflets and calyx hairy; petals at least partly purple or bluish		(18)
18 (17)	Stem ca. 2 mm thick; leaflets adaxially glabrous; bracts sparsely black hairy; calyx 4.5-5 mm; petals blue to blue-violet with yellowish base.		33 A. muliensis
+	Stem ca. 6 mm thick; leaflets adaxially sparsely hairy; bracts glabrous or sparsely white ciliate; calyx ca. 6 mm; petals yellow with purple-tipped standard or keel or all purplish.		29 A. minhensis
19 (16)	Leaflets 10-17 × 3-7 mm; bracteoles 0.5-1 mm, at pedicel; calyx 4(-5) mm; petals lilac to dark purple.		37 A. purpurinus
+	Leaflets at least in part distinctly longer; bracteoles absent (only in A. arnoldianus sometimes present); calyx at least 5 mm but mostly distinctly longer; petals yellow when alive, sometimes purple when dry		(20)
20 (19)	Bracts 3-5 mm; stems glabrous or with appressed hairs		(21)
+	Bracts at least 5 mm but partly distinctly longer, if sometimes only ca. 4 mm (in A. lessertioides), then stems with ascending to spreading hairs		(23)
21 (20)	Calyx hairy only at upper margins and teeth, teeth 2-3 mm; stipules 1-1.6 cm, auricle-like dilated at base; leaflets in 6-9 pairs, abaxially sparsely hairy at midrib or glabrous; peduncle glabrous.		21 A. ernestii
+	Calyx hairy also at tube, teeth only up to 1.5 mm; stipules up to 1 cm, not dilated at base, lower ones often connate around petiole up to top; leaflets in 4-6 pairs, abaxially loosely hairy; peduncle loosely hairy		(22)
22 (21)	Plants in vegetative parts with mainly black hairs; lower stipules often connate around petiole up to top; calyx ca. 9 mm; standard 16-19 mm.		16 A. arnoldianus
+	Plants in vegetative parts with mainly white hairs; all stipules free from each other; calyx 6-7 mm; standard 12-14 mm.		28 A. luteolus
23 (20)	Stamen tube closed, monadelphous		(24)
+	Stamen tube diadelphous, with 1 free stamen		(25)
24 (23)	Leaflets glabrous or ciliate when young; racemes with flowers all around, rachis densely black hairy; calyx teeth unequal, upper ones triangular, 1-1.5 mm, lower ones narrowly triangular 1.5-3 mm; standard 16-17 × 8-11 mm, with short claw.		34 A. neomonodelphus
+	Leaflets sparsely hairy abaxially; racemes 1-sided, rachis sparsely white or black hairy; calyx teeth all subulate, 3-4 mm; standard 12-13 × 5-6 mm, with long claw.		31 A. monadelphus
25 (23)	Calyx 4.5-7 mm with glabrous tube, teeth narrowly triangular-acuminate, 1.5-3 mm; petals yellow drying to brown-violet; standard 11-12 mm.		26 A. lessertioides
+	Calyx longer with tube hairy at least in upper part, teeth triangular, up to 1.5 mm; petals remaining yellow; standard distinctly longer		(26)
26 (25)	Stems and leaf rachis sparsely to loosely covered with subappressed to ascending hairs; legumes with white and black hairs.		25 A. lepsensis
+	Stems and leaf rachis glabrous or more rarely very sparsely appressed hairy; legumes with black hairs only		(27)
27 (26)	Peduncle sparsely, toward raceme more densely, black hairy, rarely subglabrous; standard 14-17 mm; legumes 1-2.5 cm, flattened dorsally and ventrally.		23 A. frigidus
+	Peduncle glabrous; standard 15-25 mm; legumes 2.5-4.5 cm, slightly keeled ventrally, slightly grooved dorsally.		39 A. tecti-mundi