Lithocarpus dasystachyus is a species of tree in the family Fagaceae.
The species was first described as Quercus dasystachya by Friedrich Anton Wilhelm Miquel in 1864. The specific epithet dasystachya means 'thickly hairy spike', referring to the inflorescence. In 1919 Alfred Rehder placed the species in genus Lithocarpus as L. dasystachyus.
Description Lithocarpus dasystachyus grows as a tree up to tall with a trunk diameter of up to . The greyish brown bark is smooth, flaky or fissured. The coriaceous leaves measure up to long. Its dark brown acorns are ovoid to conical and measure up to across.
Distribution and habitat Lithocarpus dasystachyus is endemic to Borneo. Its habitat is peat swamp and kerangas forests, sometimes hill dipterocarp forests, up to elevation.
Conservation Lithocarpus dasystachyus has been assessed as least concern on the IUCN Red List. Its region has seen deforestation and conversion of land for farming and urban development. The species is sometimes logged and locally harvested for firewood. It is not known to be in any protected areas.
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