Semecarpus angustifolius is a flowering plant in the family Anacardiaceae. It is native to Borneo.
Description Semecarpus angustifolius grows as a small tree. The brown twigs are fissured. The leaves are oblong and measure up to long and to wide. The ellipsoid fruits measure up to long.
Taxonomy Semecarpus angustifolius was described by Malaysian botanist Kizhakkedathu Mathai Kochummen in Sandakania in 1996. The type specimen was collected in Tawai Forest Reserve in Sabah, Borneo. The specific epithet angustifolius means 'narrow-leaved'.
Distribution and habitat Semecarpus angustifolius is endemic to Borneo, where it is confined to Tawai Forest Reserve in Sabah. Its habitat is in lowland forests, at about elevation.
Conservation Semecarpus angustifolius has been assessed as vulnerable on the IUCN Red List. It is threatened by forest fires and by climate change. However, Tawai Forest Reserve is a protected area.
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