Stem anatomy . Secretory cavities absent. Internal phloem absent. Included' phloem absent. Reproductive type, pollination .
Unisexual flowers present .
Plants monoecious, or polygamomonoecious . Inflorescence, floral, fruit and seed morphology . The terminal inflorescence unit cymose. Floral receptacle with neither androphore nor gynophore . Free hypanthium absent.