Xanthophyllum lineare is a tree in the family Polygalaceae. The specific epithet Latin: [[:wikt:lineare|lineare]] is from the Latin meaning 'line', referring to the linear shape of the leaves.
Xanthophyllum lineare grows up to 7m (23feet) tall with a trunk diameter of up to 9cm (04inches). The smooth bark is brown or blackish. The flowers are pinkish or red. The light brown fruits are round and measure up to 1.80NaN0 in diameter.
Xanthophyllum lineare is endemic to Borneo and known only from Sabah. Its habitat is stunted lowland rain forest growing on ultrabasic bedrock, from 200m (700feet) to 800m (2,600feet) elevation.