Glycosmis longisepala is a tree of Borneo in the family Rutaceae.
The specific epithet longisepala is from the Latin meaning "long sepal".
[3] Glycosmis longisepala grows as a small tree.
The subellipsoid fruits measure up to 0.75 cm (0.3 in) long.
[3] Glycosmis longisepala is endemic to Borneo where it is confined to Mount Pueh in Sarawak.