KEY TO THE GENERA

1	Leaves with basal nerves only. Anther dorsally attached to the base of long, petal-like outgrowth of the connective. Ovules rather numerous, inserted at the base of the ovary Stemona
1'	Leaves with lateral nerves. Anther at the top of short filament, without outgrowth of the connective. Ovules few, apically inserted Stichoneuron