Xanthophyllum korthalsianumXanthophyllum korthalsianum is a tree in the family Polygalaceae. It is named for the Dutch botanist Pieter Willem Korthals.DescriptionXanthophyllum korthalsianum grows up to tall with a trunk diameter of up to. The inflorescences are branched and may be much longer than the leaves.Distribution and habitatXanthophyllum korthalsianum is a rare species, growing naturally in Sumatra and Borneo. Its habitat is ridge forest at around altitude.