Castanopsis borneensisCastanopsis borneensis is a species of tree in the family Fagaceae. The specific epithet borneensis is from the Latin, meaning 'of Borneo'.DescriptionCastanopsis borneensis grows as a tree up to tall with a trunk diameter of up to. The bark is smooth or fissured. The coriaceous leaves measure up to long. Its ovoid nuts measure up to long.Distribution and habitatCastanopsis borneensis is endemic to Borneo. Its habitat is lowland dipterocarp and kerangas forests, to altitude.