Stem anatomy . Xylem without vessels. Root anatomy . Root xylem with vessels. Reproductive type, pollination .
Unisexual flowers present .
Plants dioecious, or polygamodioecious . Floral nectaries present. Inflorescence, floral, fruit and seed morphology . Inflorescences panicles, often large and many-flowered, the flowers on articulated pedicels . Perigone tube absent.