Stem anatomy . Secondary thickening developing from a conventional cambial ring. Reproductive type, pollination . Inflorescence, floral, fruit and seed morphology . The terminal inflorescence unit cymose.
Calyx lobes markedly shorter than the tube.
Corolla lobes when gamopetalous, markedly longer than the tube. Androecium exclusively of fertile stamens. Filaments not appendiculate . Endothecium developing fibrous thickenings. The initial microspore tetrads isobilateral.