Key for Dichapetalaceae

1Inflorescence with a long distinct peduncle; petals free and regular; stamens free
1'Inflorescence sessile or almost so; petals connate or only 3, free; stamens adnate to corolla tube
2Corolla with 5 equal obtuse lobes, shorter than tube; fertile stamens 5, anthers sessile on tube (not in the Guianas, see family distribution)
2'Corolla zygomorphic, lobes bifid and bicucullate, exceeding tube in length; fertile stamens 3 or 5, anthers on slender filaments