Castanopsis buruana is a tree in the family Fagaceae. The specific epithet is from the Latin, meaning "of Buru" (one of Indonesia's Maluku Islands).
Description Castanopsis buruana grows as a tree up to tall with a trunk diameter of up to . The brown bark is smooth or scaly. The coriaceous leaves measure up to long. Its ovoid to roundish nuts measure up to long.
Distribution and habitat Castanopsis buruana grows naturally in Borneo, Sulawesi and Maluku. Its habitat is dipterocarp forests from sea-level to altitude.
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