Secondary thickening developing from a conventional cambial ring. Xylem with fibre tracheids. Reproductive type, pollination . Inflorescence, floral, fruit and seed morphology . Inflorescences spikes, panicles or racemes representing lax or rarely condensed dichotomous cymes.
Corolla lobes markedly longer than the tube.
Androecium exclusively of fertile stamens. Gynoecium 3 carpelled. Carpels reduced in number relative to the perianth. The pistil 1 celled. Ovary 1 locular.