Stem anatomy . Secondary thickening developing from a conventional cambial ring. Reproductive type, pollination . Monoecious, or dioecious . Inflorescence, floral, fruit and seed morphology .
Inflorescences bracteate spikes or catkins of mostly sessile flowers.
Free hypanthium absent. Androecium in male flowers, exclusively of fertile stamens. Pollen shed as single grains. Gynoecium 3, or 5. Carpels isomerous with the perianth, or increased in number relative to the perianth.