The spadix is bisexual with unisexual, naked flowers. The ovary consists of an ellipsoid, ovoid or bottle-shaped uniloculate, uniovulate ovary with a single anatropous ovule on the basal end of a parietal placenta. The positioning of the ovules results in an ovule that is functionally basal. The staminate flowers are 3-androus and fused into somewhat scattered to densely aggregated, peltate, synandria. The male and female zones are separated by a few synandrodes.
All species have a further zone of synandrodes situated at the spadix apex.
In H. appendiculata , H. brownii Hook.f. A perfume has been reported from cultivated specimens of H. kerrii Gagnep. No pollination studies have been undertaken. When ripe the berries are globular to ellipsoid with slight to rather prominent stigmatic remains. The pericarp is leathery and the mesocarp sticky.