Reproductive type, pollination . Inflorescence, floral, fruit and seed morphology . Flowers aggregated in 'inflorescences'. The terminal inflorescence unit usually a panicle. Hypogynous disk usually present.
Corolla lobes markedly shorter than the tube to markedly longer than the tube.
Androecium exclusively of fertile stamens. Microsporogenesis successive, or simultaneous. The initial microspore tetrads tetrahedral, or isobilateral, or decussate. Anther wall initially with one middle layer, or initially with more than one middle layer. Gynoecium when G2, i.e. nearly always, transverse .