Mesua borneensis (P.F.Stevens) ?

Latin for 'from Borneo'.

Kayea borneensis P.F.Stevens

Mid-canopy tree up to 39 m tall and 70 cm dbh. Stem with white to yellow latex. Leaves opposite, simple, penni-veined, glabrous, conspicuous secondary venation, perpendicular to midrib. Flowers ca. 32 mm diameter, white-yellow, in dense bundles in leaf axils. Fruits ca. 40 mm diameter, reddish-brown, fleshy capsule.

In undisturbed mixed dipterocarp and sub-montane forests up to 1100 m altitude. Mostly on hillsides and ridges with sandy to clay soils, also on limestone. In secondary forests usually present as a pre-disturbance remnant tree.

Borneo (Sarawak, Sabah, East-Kalimantan).

Local names
Borneo: Bintangor batu, Mergasing.