1	Leaf rachis terminating in a leaflet, bristle, or mucro		(2)
+	Leaf rachis terminating in a tendril		(11)
2 (1)	Herbs annual; legume 50-100 × 20-30 mm; raceme rachis very short to nearly absent; plants cultivated.		40 V. faba
+	Herbs perennial; legume 20-50 × 5-8 mm; raceme rachis usually obvious; plants wild		(3)
3 (2)	Leaflets 1-paired		(4)
+	Leaflets 2-7-paired		(5)
4 (3)	Raceme ± cylindric, usually obviously longer than leaf; calyx glabrescent; leaflets ovate to lanceolate or rhombic-elliptic.		30 V. unijuga
+	Raceme abbreviated to capitate, shorter than leaf; calyx villous; leaflets broadly ovate to subrhomboid.		31 V. ohwiana
5 (3)	Plants 15-30 cm tall; leaflets 5-20 × 1-4 mm (Xinjiang)		(6)
+	Plants 30-100 cm tall; leaflets 20-85(-90) × 3-35 mm (mostly E and NE China, not Xinjiang)		(7)
6 (5)	Leaflets linear, 10-20 × 1-2 mm; stipules divided nearly to middle into 5-7 unequal teeth; plants of steppes or foothills.		1 V. subvillosa
+	Leaflets elliptic-lanceolate, 5-11 × 1.5-4 mm; stipules only dentate at base; plants of high mountains (2500-4200 m).		V. semenovii (see note under
7 (5)	Raceme branched		(8)
+	Raceme unbranched		(9)
8 (7)	Leaflets linear to narrowly lanceolate; stipules 10-15 × 3-5 mm.		28 V. venosa
+	Leaflets lanceolate or ovate-lanceolate; stipules 8-12(-16) × 10-13 mm.		29 V. ramuliflora
9 (7)	Bracts persistent at base of pedicels.		25 V. kulingana
+	Bracts absent or caducous		(10)
10 (9)	Stipules triangular or lanceolate, 3-6 × 1-3 mm; leaflets 3- or 4-paired, narrowly oblong to oblong-lanceolate; stem zigzagged.		26 V. deflexa
+	Stipules obliquely ovate, 12-15 × 6-8 mm; leaflets 2-paired, ovate; stem straight.		27 V. chianschanensis
11 (1)	Raceme very short, peduncle shorter than flowers		(12)
+	Raceme long, peduncle often long		(14)
12 (11)	Herbs perennial.		37 V. sepium
+	Herbs annual		(13)
13 (12)	Corolla white or yellow-white; plants densely yellow to brown villous; legume densely brown villous.		38 V. pannonica
+	Corolla blue-purple or purple to red; plants puberulent to pubescent; legume glabrous to pubescent.		39 V. sativa
14 (11)	Raceme 1-4(-7)-flowered		(15)
+	Raceme 5- to many flowered		(19)
15 (14)	Flowers to 5 mm		(16)
+	Flowers 10-25 mm		(17)
16 (15)	Legume glabrous; seeds 4; raceme 1- or 2-flowered; corolla 4-8 mm.		35 V. tetrasperma
+	Legume hirsute; seeds 2; raceme 2-4(-7)-flowered; corolla 2-4 mm.		36 V. hirsuta
17 (15)	Leaflets 8-11-paired.		33 V. tetrantha
+	Leaflets 2-5-paired		(18)
18 (17)	Herbs perennial; leaflets linear, 2-3 mm wide; stipules linear-lanceolate.		32 V. geminiflora
+	Herbs annual or short-lived perennial; leaflets linear-oblong, oblong, or narrowly oblong-oblanceolate to oblong-obovate, 2-8 mm wide; stipules semihastate.		34 V. bungei
19 (14)	Leaflets 5-10 × as long as wide; raceme 8-40-flowered		(20)
+	Leaflets 2.5-5 × as long as wide; raceme 5-15-flowered		(25)
20 (19)	Herbs annual		(21)
+	Herbs perennial		(22)
21 (20)	Leaves (5-)10-15 cm; stipules 2-4(-10) mm; legume linear, 40-42 mm; corolla 11-12 mm.		6 V. bakeri
+	Leaves 3-6 cm; stipules 7-12 mm; legume oblong or oblong-rhomboid, 20-40 mm; corolla 10-18 mm.		7 V. villosa
22 (20)	Lateral veins of leaflets dense.		5 V. megalotropis
+	Lateral veins of leaflets sparse and/or not obvious		(23)
23 (22)	Corolla 12-18 mm, limb of standard longer than claw.		4 V. tenuifolia
+	Corolla 8-13(-15) mm, limb of standard subequaling claw		(24)
24 (23)	Leaflets linear, linear-lanceolate, or oblong, 11-30 × 2-4 mm.		2 V. cracca
+	Leaflets oblong-ovate, 25-45 × 5-8 mm.		3 V. lilacina
25 (19)	Stipules 8-20 mm		(26)
+	Stipules 3-12 mm		(27)
26 (25)	Leaflets 2-6(-10) × 1-3.5 cm, apex obtuse or acuminate, mucronate.		8 V. pseudo-orobus
+	Leaflets 1.3-4 × 0.5-1.8 cm, apex rounded and retuse.		9 V. amoena
27 (25)	Corolla white to yellow, brown-yellow, or pink or purple (in V. sinogigantea), sometimes veined or marked with purple, purple-blue, or violet		(28)
+	Corolla blue, blue-purple, purple, or red		(33)
28 (27)	Corolla standard ca. 7 mm; legume 10-20 mm; plants persistently white pilose.		18 V. sinogigantea
+	Corolla standard 7-13 mm; legume 20-40 mm; plants pilose, puberulent, or glabrous, sometimes youngest growth densely brownish villous (in V. dichroantha)		(29)
29 (28)	Leaflets 4-18(-34) × 1-6 mm		(30)
+	Leaflets 15-50 × 5-15 mm		(31)
30 (29)	Raceme shorter than or subequaling leaf; corolla yellow; leaflets elliptic.		23 V. nummularia
+	Raceme obviously longer than leaf; corolla yellow, light yellow, or white; leaflets oblong-lanceolate or elliptic.		24 V. costata
31 (29)	Raceme shorter than leaf; corolla white with fine purple-blue veins.		22 V. wushanica
+	Raceme longer than leaf; corolla pale greenish cream, yellow, or brown-yellow, sometimes marked purple or veined violet on standard		(32)
32 (31)	Stipules entire at margin; raceme 5-15-flowered, rachis slender; leaflets elliptic to ovate-oblong.		19 V. taipaica
+	Stipules 2- or 3-toothed at margin; raceme 20-25-flowered, rachis strong and straight; leaflets linear to linear-lanceolate.		20 V. dichroantha
33 (27)	Lateral veins of leaflets inclined forward, sparse		(34)
+	Lateral veins of leaflets spreading horizontally, dense		(37)
34 (33)	Raceme obviously shorter than leaf, bracts present.		13 V. latibracteolata
+	Raceme subequaling or longer than leaf, bracts absent		(35)
35 (34)	Leaflets linear to oblong; corolla 13-17 mm.		14 V. multicaulis
+	Leaflets narrowly lanceolate to ovate; corolla 10-14 mm		(36)
36 (35)	Leaflets markedly discolorous, abaxially pale green, adaxially green, narrowly lanceolate to lanceolate-ovate.		16 V. chinensis
+	Leaflets not markedly discolorous, lanceolate-ovate to ovate or elliptic, rarely narrowly lanceolate-elliptic.		15 V. japonica
37 (33)	Raceme densely 15-30-flowered; leaflets oblong or oblong-ovate to elliptic		(38)
+	Raceme sparsely 4-16(-20)-flowered; leaflets narrowly oblong to narrowly ovate-elliptic		(39)
38 (37)	Raceme subequaling leaf; leaflet apex retuse and entire; corolla blue-purple or white, rarely purple; legume rhomboid or suboblong.		12 V. amurensis
+	Raceme obviously longer than leaf; leaflet apex truncate, 3- or 4-toothed, and mucronate; corolla blue; legume linear.		21 V. ternata
39 (37)	Corolla 7-8(-14) mm, strongly bent upward at middle forming a 90° angle.		17 V. kioshanica
+	Corolla 10-11 mm, not bent as strongly as above		(40)
40 (39)	Stipules triangular, margin 3-5-toothed; raceme longer than leaf; leaflet apex obtuse, mucronate.		10 V. tibetica
+	Stipules small, bifid; raceme subequaling leaf; leaflet apex truncate or rounded, mucronate.		11 V. perelegans