Nodes unilacunar, or tri-lacunar. Internal phloem absent. Included' phloem absent. Vessels without vestured pits. Reproductive type, pollination .
Unisexual flowers present .
Plants dioecious, or polygamomonoecious. Inflorescence, floral, fruit and seed morphology . The terminal inflorescence unit cymose. Inflorescences cymes or fascicles, rarely racemes. Free hypanthium absent .