Cratoxylum glaucum is a plant in the family Hypericaceae. The specific epithet ' is from the Latin meaning 'blue-green', referring to the colour of the leaf underside.
Cratoxylum glaucum grows as a shrub or tree measuring up to tall with a diameter of up to . The flaky bark is reddish brown. The flowers are crimson. The fruits measure up to long.
Cratoxylum glaucum grows naturally in Sumatra, Peninsular Malaysia and Borneo (including offshore islands). Its habitat is forests (including kerangas forests) from sea-level to altitude.