Contains 2 genera and 4 accepted taxa overall.
This family is completely databased for all specimens.
[Family identification key]
1. Buds with scales; pith chambered; petiole 11-35 mm long; inflorescences borne on shoots of previous growing season; fertile shoots of current growing season without fully developed leaves (rarely fully developed); articulation between pedicels and flowers present; corolla lobes 4; ovaries completely inferior; fruits winged
1. Buds without scales; pith continuous; petiole 2-12 mm long; inflorescences borne on shoots of current growing season; fertile shoots of current growing season with fully developed leaves; articulation between pedicels and flowers absent; corolla lobes 5-6(8); ovaries partly inferior; fruits not winged