KEY TO THE SPECIES

1	Hairs on the lamina lower surface patent, usually dense; leafy twigs brown tomentose; stipules 0.5-1 cm long. — Sumatra, Malay Peninsula, Borneo Parartocarpus bracteatus
1'	Hairs on the lamina lower surface (±) appressed, usually sparse or absent; leafy twigs whitish to brownish, mostly appressed puberulous; stipules 0.2-0.4 cm long. — Widespread Parartocarpus venenosus