In the following group descriptions, a number in parentheses indicates the number of genera exhibiting a character state.
Inflorescences racemose, racemose-paniculate or flowers solitary.
Inflorescences not cymose. Flowers often pentamerous through calyx, corolla and androecium. Disc nearly always absent. Cotyledons mostly of types 2 or 3. Calyx and corolla usually very irregular.