Stamens 6, opposite to the petals, circinate in bud, inserted below the middle of the calyx-tube, exserted; anthers dorsifixed, curved.
Capsule ± exserted, thinly membranous, tipped by the style, dehiscing irregularly; seeds flat, winged all around.
Calyx-tube campanulate, the lobes triangular, valvate, alternating with plicate appendages in the sinuses.
Flowers 5–6-merous in terminal panicles with 4-gonous branches.
Leaves decussate, shortly petiolate.
Petals caducous, corrugated in bud.
Small tree.