Vatica rassak (Korth.) Bl., Mus. Bot. Lugd. Bat. 2 (1852)

Named after the local Malay name of this species (rasak).

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.

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.

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.

The timber is used.

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

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