Wood parenchyma apotracheal. Reproductive type, pollination . Gynoecium of male flowers absent. Floral nectaries absent. Inflorescence, floral, fruit and seed morphology .
Inflorescences erect spikes or catkins .
Hypogynous disk absent. Perianth absent . Androecium of male flowers, exclusively of fertile stamens. Endothecium developing fibrous thickenings. Endosperm formation nuclear.