B. crateris and B. baccata differ principally in the indumentum which is much denser in B. crateris particularly the stems, petioles, peduncles, axis of the inflorescence, ovaries and fruits. Another important difference are the leaves which are generally peltate in B. crateris and not so in B. baccata . Section Squamibegonia 3. Begonia ampla Hook. Inflorescence bisexual, cupped by large bracts.
Flowers pinkish or white.
Male flowers with 2 perianth segments, anthers dehiscing by longitudinal slits. Female flowers with 2 perianth segments, styles 4, forked, stigma spirally twisted. Ovary obovoid, large, not winged. Cameroon, S o Tom , Principe, Annobon, Bioko, Gabon, Congo, Zaire, Rwanda and Uganda. Local distribution .