Stem anatomy . Secondary thickening developing from a conventional cambial ring. Xylem with fibre tracheids. Reproductive type, pollination . Inflorescence, floral, fruit and seed morphology .
Calyx lobes markedly longer than the tube.
Calyx slightly imbricate. Androecium exclusively of fertile stamens. Gynoecium 4 carpelled. The pistil 4 celled . Ovary 4 locular.