Deciduous, usually suckering, large shrubs, not armed; stems ± erect, glabrate. Lvs distributed along young stems, large, imparipinnate; leaflets toothed, petiolulate; stipules small, free, persistent. Infl. a large terminal panicle of many small fls. Fls 5-merous, ☿, small, shortly pedicellate. Hypanthium broadly cup-shaped. Epicalyx 0. Sepals persistent; lobes reflexed. Petals ovate to suborbicular, small but exceeding calyx, white. Stamens 20-50, inserted at mouth of calyx tube. Ovary superior; carpels (4)-5-(8), fused at base; styles 5; ovules several. Fr. of usually 5 follicles; seeds several in each follicle, small.