Xylem without vessels. Root anatomy . Root xylem with vessels, or without vessels. Vessel end-walls scalariform. Reproductive type, pollination .
Unisexual flowers present .
Floral nectaries present, or absent. Inflorescence, floral, fruit and seed morphology . The floral irregularity involving the perianth. The gynoecium acyclic. Perigone tube present, or absent.