1	Leaves 11–13 foliolate; standard bright green, nectary guide surrounded by sericeous hairs on inner face; wing petals lilac-purple; style glabrous	C. bonatiana
–	Leaves 3–5 foliolate; standard glabrous within	2
2	Leaves 3(– 5) foliolate; standard white sometimes flushed green, style ciliate or sericeous at base; seeds 1–2	C. cochinchinensis
–	Leaves 5-foliolate; standard pink, lilac, red or purple, style glabrous; seeds (1 –)3–5	3
3	Stipels subulate, 1–2 mm long; bracteoles reflexed; pods linear-oblong, not inflated	C. nitida
–	Stipels linear 3–4 mm long; bracteoles straight; pods inflated	4
4	Floral bracts lanceolate 3–5 mm long; seeds 3–5 per pod, 8 × 6 mm, tawny brown, oblong or suborbicular	C. dielsiana
–	Floral bracts narrowly ovate to linear 2–6 mm long; seeds (1 –)2–4 per pod, 18 × 14 mm, dark violet, ellipsoid	C. cinerea