1	Inflorescence cylindrical in bud; bracteoles present below calyx; papillate callosities present on standard petals; pods velutinous, slightly torulose; seeds lenticular	2
–	Inflorescence conical in bud; bracteoles absent; standard petal with ridge callosities; wing petals with subulate spur-like auricles 4–6 mm long; pods glabrous with a few longitudinal undulations; seeds reniform or oblong	W. frutescens
2	Inflorescence 12–120 cm long; floral bracts 5–20 × 2–12 mm, linear or ovate-lanceolate, standard petal with papillate callosities; wing petals with short deltoid auricles 1–3 mm long; pods velutinous; seeds lenticular	3
–	Inflorescence 8–20 cm long; floral bracts 15–23 × 5–12 mm, broadly ovate, attenuate, densely sericeous	W. brachybotrys
3	Inflorescence 18–120 cm long; floral bracts 5–12 × 2–6 mm, linear, puberulent; standard petal broadly ovate, 8–16 × 8–12 mm	W. floribunda
–	Inflorescence 12–20 cm long; floral bracts 8–20 × 10–12 mm, ovate-lanceolate, puberulent; standard petal suborbicular, 20–30 × 20–30 mm	W. sinensis