Quercus gaharuensis
Quercus gaharuensis is a species of oak native to Borneo, Sumatra, and Peninsular Malaysia. It is placed in Quercus subgenus Cerris, section Cyclobalanopsis.

Range and habitat
Quercus gaharuensis is known from widely scattered sites in Sumatra, Peninsular Malaysia, and Borneo (East Kalimantan, Sarawak, and Sabah).

It grows in lowland mixed dipterocarp rain forests and lower montane rain forests up to 1,400 metres elevation.

Conservation
Quercus gaharuensis is threatened with habitat loss from widepread deforestation across its range. The populations in northern Sumatra, comprising 25% of the species' known sites, are in or adjacent to protected areas. The known sites in central Sumatra and on Borneo are unprotected and have been logged or converted to agriculture.

References

gaharuensis
Trees of Borneo
Trees of Sumatra
Trees of Peninsular Malaysia
Flora of the Borneo lowland rain forests
Flora of the Borneo montane rain forests
Plants described in 1966
Taxa named by Engkik Soepadmo