Mastixia eugenioides is a tree in the family Nyssaceae. The specific epithet Latin: eugenioides is from the Latin and refers to the resemblance of the leaves to those of the genus Eugenia.
Mastixia eugenioides grows as a tree measuring up to 30m (100feet) tall with a trunk diameter of up to 30cm (10inches). The smooth bark is greyish to yellowish brown. The ovoid to oblong fruits are green, ripening purple, and measure up to 2.50NaN0 long.
Mastixia eugenioides is endemic to Borneo. Its habitat is mixed dipterocarp forests from sea-level to 1200m (3,900feet) altitude.