Alstonia constricta F.Muell.

Tree to 15 m high. Leaves opposite; petiole 5–50 mm long; lamina linear-lanceolate, lanceolate or lanceolate-obovate, 2.5–18 cm long, 0.7–5 cm wide, cuneate, acute, discolorous; secondary veins 12–20 each side of midrib, 2–9 mm apart; tertiary venation reticulate and prominent. Inflorescence 2–20 cm long. Flowers 4–5 mm long, 3.5–13 mm diam.; pedicels 1.5–2.7 mm long. Sepals lanceolate-ovate to ovate, 0.8–2 mm long. Corolla cream; tube 2.5–4 mm long, glabrous externally; lobes lanceolate, 2.5–6 mm long, primarily glabrous apart from dense indumentum internally on lower half. Fruit 7–26 cm long. Seeds oblong, 6–7 mm long; hairs 2–5 mm long.

A pioneer species in vine thickets and vine forests or in open forests and woodlands.

Can be grown by seedlings.