Internal phloem absent. Included' phloem absent. Reproductive type, pollination . Inflorescence, floral, fruit and seed morphology . Free hypanthium absent.
Corolla lobes markedly shorter than the tube.
Androecium exclusively of fertile stamens. Carpels reduced in number relative to the perianth to isomerous with the perianth. Endosperm formation cellular. Dispersal unit the fruit. Physiology, biochemistry .