Tree to 10 m high. Branches with prominent leaf scars. Leaves usually paripinnate; leaflets 4–9, oblong-ovate, slightly falcate, (3–) 5–8 (–9) cm long, (1.5–) 3–4.5 (–5.5) cm wide, entire (sometimes sinuate-dentate on Lord Howe Island), abruptly acuminate. Inflorescence axillary, few-to many-flowered; pedicels articulate. Flowers functionally unisexual. Sepals 4, ovate, 0.5–1 mm long, caducous. Petals 4 or 5, free, lanceolate, 2.5–3 mm long, white, valvate. Stamens 4 or 5, 2–3 mm long. Ovary c. 1.5 mm long; style short. Fruit a single globose follicle, c. 8 mm diam., dotted with oil glands, purple, splitting to tardily release solitary seed. Seed c. 6 mm diam., black.