KEY TO THE SECTIONS

1Fruits apocarpous; mericarps verrucose to smooth, or with fine irregular ridges when dried, more or less round in transverse section, not compressed; endocarps split into diverging fibres, lateral cavities absent
1'Fruits apocarpous, rarely hemisyncarpous, or syncarpous; mericarps often smooth when dried, often dorsiventrally compressed or biconvex in transverse section; endocarps not split into diverging fibres, hard, thick, massive surrounding 2 lateral cavities