Castanopsis densinervia is a tree in the family Fagaceae. The specific epithet Latin: densinervia is from the Latin meaning 'dense nerves', referring to the leaf venation.
Castanopsis densinervia grows as a tree up to 30m (100feet) tall with a trunk diameter of up to 50cm (20inches). The greyish bark is smooth. The coriaceous leaves measure up to 12.5cm (04.9inches) long. Its ovoid nuts measure up to 3.51NaN1 long.
Castanopsis densinervia is endemic to Borneo. Its habitat is hill dipterocarp to lower montane forests from 1000m (3,000feet) to 1800m (5,900feet) elevation.