Reproductive type, pollination . Floral nectaries present. Inflorescence, floral, fruit and seed morphology . Free hypanthium present. Hypogynous disk absent.
Calyx lobes markedly longer than the tube.
Androecium exclusively of fertile stamens. Endothecium developing fibrous thickenings. Anther epidermis persistent. The initial microspore tetrads tetrahedral, or isobilateral, or decussate. Pollen shed as single grains.