1	At least some leaves with only 1 leaflet		(2)
+	All leaves (ignore terminal ones) with at least 1 pair of leaflets		(5)
2 (1)	Calyx 5-7 mm; petals pink; standard 12-15 mm		(3)
+	Calyx 10-12 mm; petals yellow; standard 21-23 mm		(4)
3 (2)	Basal leaves with 1 terminal leaflet, other leaves with 1 additional pair of leaflets; plants with ± medifixed, appressed hairs; racemes with a peduncle 2-5 cm.		361 A. visibilis
+	All leaves with only 1 terminal leaflet; plants at stipules and calyx with strongly asymmetrically bifurcate to basifixed, ascending to spreading hairs.		359 A. vallestris
4 (2)	Leaves partly with only 1 terminal leaflet, partly with an additional pair of leaflets, leaflets obovate, 6-15 × 3-6 mm; bracts ca. 8 mm; legumes subglobose, 4-5 mm.		341 A. muschketowii
+	Leaves always with only 1 terminal leaflet, widely elliptic, 8-16 × 8-12 mm; bracts 3-4 mm; legumes narrowly ellipsoid, 15-18 mm, ca. 6 mm high.		340 A. monophyllus
5 (1)	Leaflets in 1-3(or 4) pairs		(6)
+	Leaflets in more pairs		(19)
6 (5)	Calyx 6-9 mm; bracts up to 7 mm		(7)
+	Calyx at least (8-)9 mm, but mostly and at least partly longer; bracts (7-)8-12 mm		(13)
7 (6)	Standard 12-13 mm.		322 A. brevivexillatus
+	Standard ca. 16 mm or longer		(8)
8 (7)	Stipules 2-3 mm; leaflets only in 1 pair; calyx black hairy; petals pink; standard ca. 21 mm, keel ca. 15 mm.		328 A. gregorii
+	Stipules longer; leaflets at least partly in 2 or 3 pairs; calyx white hairy; petals whitish, yellow, or purplish		(9)
9 (8)	Stipules 2.5-4 mm; leaflets in 3 pairs; bracts 1-1.5 mm; standard ca. 16 mm, keel ca. 11 mm; calyx with medifixed, appressed hairs.		358 A. trijugus
+	Stipules longer; leaflets in 1-3 pairs; bracts distinctly longer; standard 19-20 mm, if standard only ca. 16 mm (A. porphyreus), then calyx with basifixed, spreading hairs		(10)
10 (9)	Racemes with a peduncle 2-3 cm, 5-7-flowered; bracts ciliate, otherwise glabrous.		353 A. secretus
+	Racemes sessile, 1-3-flowered; bracts hairy		(11)
11 (10)	Calyx with ± medifixed, appressed hairs; keel ca. 16 mm.		360 A. vescus
+	Calyx with basifixed, ± spreading hairs; keel 12-13 mm or ca. 18 mm		(12)
12 (11)	Leaflets in 3 or 4 pairs, adaxially sparsely and abaxially rather densely covered with hairs ca. 1 mm; bracts ca. 7 mm; standard ca. 22 mm, keel ca. 18 mm.		319 A. acceptus
+	Leaflets in 1 or 2 pairs, adaxially loosely to rather densely and abaxially more densely covered with hairs 0.3-0.5 mm; bracts ca. 3 mm; standard 16-17 mm, keel 12-13 mm.		347 A. porphyreus
13 (6)	Standard 13-15 mm.		348 A. pseudoborodinii
+	Standard (16-)20-24 mm		(14)
14 (13)	Keel ca. 1/2 as long as standard		(15)
+	Keel distinctly more than 1/2 as long as standard		(16)
15 (14)	Stipules 5-7 mm, ciliate, otherwise glabrous; calyx tube glabrous at least in lower 1/2.		326 A. glabritubus
+	Stipules 7-12 mm, densely hairy; calyx hairy all over.		345 A. parvicarinatus
16 (14)	Petiole and rachis at least partly covered with spreading hairs		(17)
+	Petiole and rachis covered with appressed hairs		(18)
17 (16)	Petiole and rachis covered with medifixed hairs 0.4-0.6 mm; bracts ca. 3 mm.		333 A. jiuquanensis
+	Petiole and rachis covered with medifixed hairs ca. 1 mm and with basifixed hairs up to 2 mm; bracts 8-10 mm.		346 A. perbrevis
18 (16)	Some leaves with only 1 leaflet, others with an additional pair of leaflets; bracts ca. 8 mm, with hairs up to 0.8 mm; standard 22-23 mm.		341 A. muschketowii
+	Leaves with 1 or 2 pairs of leaflets; bracts 10-12 mm, with hairs up to 1.5 mm; standard ca. 20 mm.		320 A. borodinii
19 (5)	Rachis with appressed to ascending hairs		(20)
+	Rachis with at least partly spreading hairs		(31)
20 (19)	Plants in parts furnished with black hairs.		356 A. testiculatus
+	Plants only with white hairs		(21)
21 (20)	Leaflets adaxially glabrous		(22)
+	Leaflets on both surfaces sparsely to densely hairy		(23)
22 (21)	Stipules 4-5 mm; leaflets 2-6 × 0.8-2.5 mm; bracts ca. 5 mm; calyx 6-7 mm, with teeth 1.5-2 mm, covered with subbasifixed to basifixed hairs; standard 15-18 mm.		343 A. occultus
+	Stipules 5-7(-10) mm; leaflets 5-13(-19) × 1-3(-5) mm; bracts 6-9 mm; calyx ca. 9 mm, with teeth 4-6 mm, covered with asymmetrically bifurcate hairs; standard 21-26 mm.		324 A. galactites
23 (21)	Standard 15-16 mm		(24)
+	Standard distinctly longer		(25)
24 (23)	Leaflets in 6-9 pairs; bracts 3-4 mm; calyx 8-9 mm, with teeth ca. 2 mm.		330 A. hebecarpus
+	Leaflets in 3-6 pairs; bracts 7-8 mm; calyx 10-12 mm, with teeth 4-6 mm.		349 A. pseudohypogaeus
25 (23)	Calyx 7-9 mm		(26)
+	Calyx 10-15 mm		(28)
26 (25)	Standard 20-30 × 6-7 mm, narrowly oblong-pandurate, slightly to distinctly constricted below middle.		321 A. brevifolius
+	Standard 18-21 × 8-9 mm, ovate to obovate, not constricted		(27)
27 (26)	Racemes sessile, 1-3-flowered; calyx covered with strongly asymmetrically bifurcate to basifixed, tangled, flexuous, ± spreading hairs.		336 A. levidensis
+	Raceme with a peduncle 0.3-1.4(-4) cm, 3-5-flowered; calyx covered with ± medifixed, appressed hairs.		351 A. scaberrimus
28 (25)	Plants caulescent with stem up to 15 cm; peduncle distinct, 0.5-3 cm; calyx after anthesis slightly inflated.		327 A. gracilidentatus
+	Plants acaulescent; racemes sessile; calyx always tubular		(29)
29 (28)	Hairs of rachis and leaflets 1.8-3 mm; calyx with subappressed to slightly ascending hairs up to 1.5 mm, teeth 4-6 mm; standard 16-19 mm, constricted below middle; legumes with a beak 5-8 mm.		352 A. scabrisetus
+	Hairs of rachis and leaflets up to 1 mm; calyx with other kind of hairs, teeth shorter, at most up to 4 mm; standard mostly longer, not constricted below middle; legumes minutely acuminate (unknown in A. ningxiaensis)		(30)
30 (29)	Stipules 4-5 mm, with spreading, partly basifixed hairs; bracts 10-11 mm, with spreading hairs; calyx with spreading, partly basifixed hairs up to 1.2 mm; standard 23-27 mm.		342 A. ningxiaensis
+	Stipules 4-12 mm, with ± appressed, asymmetrically bifurcate hairs; bracts 3-5 mm, with appressed to ascending hairs; calyx with ascending, asymmetrically bifurcate hairs 1.5-2.5 mm, teeth 2-3 mm; standard 18-22 mm.		334 A. junatovii
31 (19)	Standard and wings hairy.		323 A. filidens
+	All petals glabrous		(32)
32 (31)	Racemes with a distinct peduncle 1-3 cm, 6-10-flowered		(33)
+	Racemes sessile or subsessile		(34)
33 (32)	Stipules 10-15 mm, adnate to petiole for 3-5 mm; calyx 10-12 mm; standard obovate, base gradually narrowed.		325 A. geerwusuensis
+	Stipules 5-6 mm, nearly free from petiole; calyx 15-16 mm; standard obovate-pandurate, below middle constricted, base angularly passing into claw.		337 A. lustricola
34 (32)	Leaflets in (9 or)10-17 pairs		(35)
+	Leaflets in 4-11 pairs		(38)
35 (34)	Stipules 3-7 mm; leaflets 3-6 × 1.5-3 mm; standard narrowly ovate; wing limbs slightly emarginate.		335 A. lang-ranii
+	Stipules 6-12 mm; leaflets larger; standard narrowly obovate, often slightly constricted in middle; wing limbs obtuse		(36)
36 (35)	Leaflets on both surfaces covered with spreading hairs; bracts ca. 12 mm; petals yellow.		344 A. ordosicus
+	Leaflets covered at least partly with subappressed to ascending hairs; bracts up to 10 mm; petals white or purple in life (often drying to yellowish brown)		(37)
37 (36)	Leaflets adaxially with subappressed hairs; bracts 7-10 mm; calyx teeth 5-7 mm; petals purple in life; standard 18-21 mm, obovate, widely cuneate at base; legumes 8-9 mm, ca. 3 mm high, with a beak 3-5 mm.		329 A. grubovii
+	Leaflets on both surfaces with ascending hairs; bracts ca. 5 mm; calyx teeth 2.5-5 mm; petals whitish; standard 22-28 mm, slightly constricted below middle, with a short claw; legumes 10-14 mm, ca. 5 mm high, shortly acuminate.		331 A. hsinbaticus
38 (34)	Leaflets in 4(or 5) pairs; calyx ca. 8 mm; standard ca. 17 mm.		355 A. tesquorum
+	Leaflets in mostly distinctly more pairs; calyx and standard distinctly longer		(39)
39 (38)	Leaflets covered with symmetrically to slightly asymmetrically bifurcate, appressed to slightly ascending hairs; bracts ca. 2 mm.		338 A. lychnobius
+	Leaflets covered with ascending to spreading hairs; bracts distinctly longer		(40)
40 (39)	Calyx 15-18 mm; standard 27-32 mm.		332 A. hypogaeus
+	Calyx at most up to 13 mm; standard up to 25 mm		(41)
41 (40)	Rachis partly appressed to subappressed hairy, with few to many spreading hairs mixed in; calyx covered with ascending to spreading, flexuous hairs up to 1 mm and with spreading, straight hairs up to 2 mm		(42)
+	Rachis only with spreading hairs; calyx with strongly asymmetrically bifurcate to basifixed, ascending to spreading hairs 1-2 mm		(43)
42 (41)	Plants covered only with white hairs; stipules 10-15 mm; leaflets elliptic to widely elliptic, 3-4 × 2-2.5 mm, rounded; flowers subsessile; standard elliptic.		357 A. transecticola
+	Bracts, pedicels, and calyx with black hairs mixed in; stipules 6-8 mm; leaflets narrowly elliptic, 5-10 × 1.5-3 mm, acute; flowers with pedicel 2-3 mm; standard obovate, below middle slightly constricted.		339 A. macriculus
43 (41)	Stipules 4-8 mm, sparsely to loosely covered with ± medifixed, subappressed to ascending hairs 0.7-1 mm, at margins also with ± basifixed hairs ca. 1.5 mm; leaflets elliptic to ovate, 3-5 × 1.5-3.5 mm; bracts 3-5 mm, very sparsely to sparsely hairy.		350 A. pseudoscaberrimus
+	Stipules 10-15 mm, loosely covered with basifixed, spreading hairs 1-2 mm; leaflets widely obovate to orbicular, 4-6 × 3.5-5.5 mm; bracts 5-7 mm, more densely hairy.		354 A. sinkiangensis