Bitter bark

Alstonia constricta

Erect shrub or tree to 12 m high, often suckering and forming thickets; bark fissured, corky.

Leaves opposite, narrow-lanceolate to narrow-elliptic or oblong-elliptic, 6–18 cm long, 7–45 mm wide, apex ± acuminate, margins undulate, soft and thin, glabrous to pubescent; petiole 1–5 cm long.

Flowers whitish, scented. Calyx lobes 1 mm long. Corolla tube 2–3 mm long, lobes 6–10 mm long, narrow, obtuse.

Follicles compressed, 6–24 cm long, c. 10 mm wide.

Plant Protection Products