KEY TO THE SUBSECTIONS

1Testa with a hard inner layer. Albumen forming a distinct layer. Embryo laterally near the base with 2 flattened areas. Radicle exserted. Spp. 14-57
Xanthophyllum subsect. Jakkia
1'Testa without a hard inner layer. Albumen very thin. Embryo without flattened areas near the base. Radicle not exserted. Spp. 58-62
Xanthophyllum subsect. Eystathes