Description from Flora of China
Melanocommia Ridley; Nothopegiopsis Lauterbach; Oncocarpus A. Gray.
Inflorescence paniculate, terminal or axillary. Stamen filaments linear; anthers ovate-cordate, versatile. Disk cup-shaped. Ovary superior to semi-inferior, 1-locular and 1-ovulate; styles 3, free or united basally. Drupe ovate-globose, inserted on an inflated hypocarp formed by fused calyx and floral receptacle. Seed testa not fused with endocarp.
About 50 species: tropical Asia to Oceania; four species in China.