Dysoxylum acutangulum Miq., Fl. Ind. Bat. Suppl. (1861)
Latin for 'sharply angular'.

Synonyms
Alliaria acutangula (Miq.) Kuntze, Alliaria schultzii (C.DC.) Kuntze, Dysoxylum foveolatum Radlk., Dysoxylum schultzii C.DC.

Description
Upper canopy tree up to 47 m tall and 140 cm dbh. Stipules absent. Leaves alternate, compound, leaflets penni-veined but venation barely visible, glabrous. Flowers ca. 10 mm diameter, white, placed in racemes. Fruits ca. 48 mm diameter, yellow-orange, capsules. Seeds with small orange arilloid.

Ecology
In undisturbed mixed dipterocarp forests up to 900 m altitude. On hillsides and ridges with sandy soils. In secondary forests usually present as a pre-disturbance remnant.

Uses
Important timber tree, mainly for furniture. The seeds are poisonous and contain dysoxylum acid.

Distribution
Thailand to New Guinea, the Solomon Islands and Australia. In Borneo collected in Sarawak, West- and East-Kalimantan.

Local names in Borneo
Langkang.