Much-branched glabrous, deciduous shrub or small tree up to 6 m high. Bark grey, smooth. Twigs green, quadrangular, smooth, not winged. Lvs opposite, ovate-lanceolate to elliptic, acute or acuminate, crenate, usually turning red in autumn, 2-10 cm long; petiole 6-12 mm long. Cymes 2-15-flowered, pedunculate, dichotomous. Buds greenish, ± 4-angled; fls usually 4-merous, 8-10 mm diam.; petals greenish yellow, ± oblong, widely separated. Capsule 4-lobed, deep pink, exposing the bright orange aril after opening.