1	"Flowers 1–4; peduncles 0–1.5 mm long; stipules usually with a prominent central gland"	"Vicia sativa"
1	"Flowers 1-many; peduncles more than 1.5 mm long; stipules lacking glands"	2
2	"Corolla 2–8 mm long; pod 8–20 mm long"	3
2	"Corolla 10–25 mm long; pod 20–50 mm long"	5
3	"Leaves with 3–6 pairs of leaflets; corolla 5–8 mm long; pod 3–4-seeded"	"Vicia tetrasperma"
3	"Leaves with 4–10 pairs of leaflets; corolla 2–5 mm long; pod usually 1–2-seeded"	4
4	"Leaflets linear to elliptic; calyx teeth unequal; pod 12–20 mm long, 5–8 mm wide, glabrous"	"Vicia disperma"
4	"Leaflets linear to lanceolate; calyx teeth subequal; pod 6–12 mm long, 2–4 mm wide, densely pubescent"	"Vicia hirsuta"
5	"Racemes 1–5-flowered; base of calyx slightly gibbous"	"Vicia monantha"
5	"Racemes 2–40-flowered; base of calyx distinctly gibbous"	"Vicia villosa"