KEY TO THE VARIETIES

1Leaves chartaceous to coriaceous; nerves on lower surface moderately prominent, 0.3-0.5 mm wide. Infructescences usually not branched at the base, few-fruited. — Peninsular Malaysia, Sumatra, Borneo
1'Leaves (very) coriaceous; nerves on lower surface more prominent, 0.5-0.7 mm wide. Infructescences conspicuously branched from the base, many-fruited. — Borneo