Mastixia macrocarpa is a tree in the family Nyssaceae. The specific epithet is from the Greek meaning "large fruit".
Description Mastixia macrocarpa grows as a tree measuring up to tall with a trunk diameter of up to . The pale green fruits are oblong-ovoid and measure up to long.
Distribution and habitat Mastixia macrocarpa grows naturally in Malaysia's Sarawak state and the Philippines' Luzon island. Its habitat is mixed dipterocarp forests at around altitude.
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