Key for Tapura Aubl.

1Leaf undersurface hirsutulous.
1'Leaf undersurface glabrous or with a few stiff appressed hairs only
2Inflorescence with a distinct peduncle of 0.1-1.2 cm long
2'Inflorescence sessile on petioles
3Fertile stamens 5, staminodes absent
3'Fertile stamens 3, staminodes 2