Vatica rassak (Korth.) Bl., Mus. Bot. Lugd. Bat. 2 (1852)
Named after the local Malay name of this species (rasak).

Synonyms
Retinodendron moluccanum Heim, Retinodendron rassak Korth., Vateria papuana Dyer ex Hemsl., Vateria rassak Walp., Vatica celebensis Brandis, Vatica celebica Sloot, Vatica moluccana Burck, Vatica papuana Dyer, Vatica rassak var. subcordata Bl., Vatica schumanniana Gilg., Vatica subcordata (Bl.) Hall.

Description
Mid-canopy tree up to 34 m tall and 69 cm dbh. Stem with resin. Stipules ca. 14 mm long. Leaves alternate, simple, penni-veined, glabrous. Flowers ca. 24 mm diameter, white-yellow-red, placed in panicles. Fruit ca. 41 mm long, green-brown, wingless.

Ecology
In undisturbed mixed dipterocarp and peat swamp forests up to 400 m altitude. Mostly on alluvial sites, sometimes on hillsides or ridges. On sandy soils, but also collected on limestone soils. In secondary forests usually present as a pre-disturbance remnant tree.

Uses
The timber is used.

Distribution
Peninsular Malaysia, Borneo (Sabah, South- and East-Kalimantan), Philippines, Celebes, Moluccas, New Guinea.

Local names in Borneo
Rasak, Resak, Resak ayer, Resak batu, Resak bunga, Resak damau, Resak danum, Resak irian, Resak rapak, Resak tebong.