Alstonia linearis Benth.

Bentham, G. (1868) Flora Australiensis 4: 314. Type: N. Australia. Cliffs of Brunswick Bay and Regents River, N.W. Coast, A. Cunningham.

Dead bark pale and corky.

Twigs and petioles produce a milky exudate. Leaves in whorls of three. Leaf blades about 7-13 x 0.5-1.5 cm, petioles about 0.4-0.7 cm long. Lateral veins about 35-45 on each side of the midrib.

Flowers about 4-6 mm diam. Calyx lobes about 1.2-1.9 mm long, glabrous inside but sparsely pubescent near the apices. Corolla tube about 3-3.5 mm long, lobes about 2.4-3 mm long, with the right margins overlapping. Stamens inserted near the middle of the corolla tube. Anthers about 0.8-0.9 x 0.3-0.4 mm.

Fruits about 20-22 cm long. Seeds oblong, acuminate or acute at one or both ends, about 5-6 x 2-2.2 mm, hairs about 5-6 mm long.

Features not available.

Endemic to WA, a rare species with a restricted distribution, known only from the Kimberley Region. Altitudinal range from near sea level to about 300 m. Usually grows in open forest on sandstone but also found in monsoon forest and rain forest.