KEY TO THE SPECIES

1Inflorescences short, corymbose-paniculate, 8-15 cm long. Flowers often large, old buds up to 35 mm long. Petals not clawed, almost equal in shape and size. Pods surface smooth or rough, not rugose
1'Inflorescences long, paniculate, up to 35 cm long or longer. Flowers small, old buds often less than 15 mm long. Petals distinctly clawed, often not equal in shape and size. Pods surface coarsely verrucose-rugose