Female flowers with a perianth as in the male; ovary of 5 sessile or shortly stipitate coherent carpels; styles connate, stigmas 5, recurved; ovules ?.
Male flowers: androphore with an apical ring of anthers in one or more rows.
Trees with entire or palmatilobed, petiolate leaves.
Seeds many, with a large wing; endosperm present.
Flowers unisexual, in axillary panicles.
Fruit of 1–5 large woody follicles.
Calyx campanulate, 5-lobed.
Petals absent.