Internal phloem absent. Included' phloem absent. Vessels without vestured pits. Primary medullary rays narrow. Reproductive type, pollination .
Unisexual flowers present .
Plants polygamomonoecious, or dioecious. Inflorescence, floral, fruit and seed morphology . The terminal inflorescence unit cymose. Free hypanthium absent. Androecium 4, or 5.