Lithocarpus dasystachyus is a tree in the beech family Fagaceae. The specific epithet dasystachyus means 'thickly hairy spike', referring to the inflorescence.
Lithocarpus dasystachyus grows as a tree up to 20m (70feet) tall with a trunk diameter of up to 30cm (10inches). The greyish brown bark is smooth, flaky or fissured. The coriaceous leaves measure up to 19cm (07inches) long. Its dark brown acorns are ovoid to conical and measure up to 1.71NaN1 across.
Lithocarpus dasystachyus is endemic to Borneo. Its habitat is peat swamp and kerangas forests, sometimes hill dipterocarp forests, up to 1000m (3,000feet) elevation.