Alstonia iwahigensis
Content
Description
Tree 15-45(-70?) m high, 20-80 cm dbh, fluted at base and forming tall buttresses up to 6 m high, spreading at the base up to 2 m away from the trunk.
Bark smooth to slightly rough, scaly or both longitudinally and horizontally fissured, greyish, yellowish or dark brown;
Branchlets glabrous.
Leaves in whorls of 4-7;
Inflorescence 2.5-10 mm long, usually forming of two bunches of dense and many clustered flowers;
Flowers fragrant.
Sepals pale green, connate at the base for 0.3-0.5 mm, erect or slightly spreading, ovate to narrowly ovate, 1.5-2.1 by 0.6-1 mm, obtuse, puberulous or densely pubescent outside, glabrous or minutely pubescent around the apex inside, ciliate.
Stamens inserted at 5-5.8 mm from the base;
Fruit a pair of follicles, 25-35 cm by c. 1.5(-2) mm, glabrous.
Seeds brown, oblong, 5-6 by 1 mm, ends rounded, glabrous on both sides, longest cilia 13-17 mm long.