Secondary thickening developing from a conventional cambial ring. Reproductive type, pollination . Inflorescence, floral, fruit and seed morphology . The terminal inflorescence unit cymose. Free hypanthium absent.
Corolla lobes about the same length as the tube, or markedly longer than the tube.
Androecium exclusively of fertile stamens. Pollen shed as single grains. Gynoecium 2 carpelled. Carpels reduced in number relative to the perianth. The pistil 1 celled .