Gonystylus affinis Radlk., Sitzb. Math.-Phys. Kl. Bayer Akad. Wiss. 1886, 16 (1887)

Latin for 'similar to', i.e. resembling another species.

Gonystylus beccarianus Tiegh.

Mid-canopy tree up to 39 m tall and 49 cm dbh. Stipules absent. Leaves alternate, simple, penni-veined but venation inconspicuous, glabrous to hairy. Flowers ca. 8 mm diameter, greenish, placed in panicles. Fruits ca. 30 mm diameter, green-grey, dehiscent capsule, exposing seeds with aril.

In undisturbed mixed dipterocarp and keranga forests up to 300 m altitude. Usually on hillsides and ridges with sandy to clay soils. In secondary forests usually present as a pre-disturbance remnant.

Wood used for house construction.

Peninsular Malaysia, Borneo (Sarawak, Brunei, Sabah, West-, Central- and East-Kalimantan).

Local names
Borneo: Banit, Bidaru, Ramin, Ramin bukit, Ramit bukit.