Xanthophyllum brachystachyum is a tree in the family Polygalaceae. The specific epithet is from the Greek meaning "short spike", referring to the shortness of the inflorescence. Description Xanthophyllum brachystachyum grows up to tall with a trunk diameter of up to . The smooth bark is grey-green or whitish. The flowers are purplish, drying orange-brown. The pale brown fruits are round and measure up to in diameter. Distribution and habitat Xanthophyllum brachystachyum is endemic to Borneo. Its habitat is mixed dipterocarp forests from to altitude. References brachystachyum Endemic flora of Borneo Trees of Borneo Plants described in 2005