Dryobalanops lanceolata Burck, Ann. Jard. Bot. Btzg. 6 (1887)
Latin for 'lance-shaped'.

Synonyms
Dryobalanops kayanensis Becc., Dryobalanops oblongifolia Dyer

Description
Emergent trees up to 69 m tall and 230 cm dbh. Stem with resin. Stipules up to ca. 12 mm long. Leaves alternate, simple, penni-veined, rather narrow and long, secondary veins placed close together. Flowers ca. 14 mm in diameter, white-yellow, placed in panicles. Fruit ca. 15 mm long, green-yellow-red, with five up to ca. 90 mm long wings placed on top of the calyx cup, wind dispersed.

Ecology
In undisturbed mixed dipterocarp forests up to 400 m altitude. On hillsides and ridges with sandy soils. In secondary forests usually present as a pre-disturbance remnant tree.

Uses
Timber is used. Resin is used as fuel and anti infectant.

Distribution
Borneo (Sarawak, Brunei, Sabah, East-Kalimantan).

Local names in Borneo
Adu, Jalam, Kapur, Kapur bukit, Kapur daram, Kapur paji, Kapur paya, Ngeri, Sesuan.