Primary medullary rays narrow. Reproductive type, pollination . Unisexual flowers present . Inflorescence, floral, fruit and seed morphology . The terminal inflorescence unit cymose.
Inflorescences usually cymes, thyrses or cincinni.
The floral irregularity involving the perianth and involving the androecium. Free hypanthium absent . Sometimes 2 of the members joined. Androecium of male-fertile flowers exclusively of fertile stamens . Endothecium developing fibrous thickenings.