Calophyllum castaneum P.F.Stevens, J. Arnold. Arbor. 6 (1980)

Latin for 'chestnut brown'.

Sub-canopy tree up to 30 m tall and 65 cm dbh. Stem with white to yellow latex. Leaves opposite, simple, penni-veined, secondary veins straight and placed close together, midrib lower surface densely brown hairy. Flowers ca. 10 mm diameter, white. Fruits ca. 21 mm diameter, green, fleshy drupe.

In undisturbed mixed dipterocarp forests up to 500 m altitude. On hillsides and ridges. In secondary forests usually present as a pre-disturbance remnant tree.