Trees or shrubs. Leaves simple, variously lobed or compound, alternate, scattered or spirally arranged. Conflorescence terminal or in upper leaf axils, umbellate, sometimes together in umbels or racemes, bracts caducous or absent. Flowers zygomorphic, bisexual; tube opening on lower side; all 4 segments finally separating; limb globular, recurved. Anthers broad, sessile; connective not extended. Hypogynous glands united into a disc or cup, sometimes very reduced. Ovary stipitate; ovules numerous, in 2 rows. Pollen presenter a flattened, oblique disc. Fruit follicular, mostly narrowly oblong or cylindrical, or flattened and semi-circular (1 species), splitting down 1 side. Seeds numerous, in 2 rows, highly compressed, winged.