Pseudocarapa crassa is a tree in the family Meliaceae. The specific epithet Latin: [[:wikt:crassus|crassum]] is from the Latin meaning 'thick', referring to the parts of the flowers.
The tree grows up to 30m (100feet) tall with a trunk diameter of up to 45cm (18inches). The bark is fawn-coloured to dark purplish brown. The sweetly scented flowers are pale green to creamy-white. The fruits are round, at least 30NaN0 in diameter.
Pseudocarapa crassa is endemic to Borneo. Its habitat is dipterocarp and kerangas forests from 700m (2,300feet) to 1150m (3,770feet) elevation.