Gonystylus forbesii is a tree in the family Thymelaeaceae.
Gonystylus forbesii grows as a tree up to tall, with a trunk diameter of up to 80cm (30inches). The bark is greyish brown. Its flowers are reddish yellow. The fruit is dark brown, up to 4cm (02inches) long.
Gonystylus forbesii is native to Sumatra and Borneo. Its habitat is mixed dipterocarp, submontane and kerangas forest to 1800m (5,900feet) altitude.
Gonystylus forbesii has been assessed as near threatened on the IUCN Red List. The species is threatened by logging for timber and by conversion of land for agriculture, especially palm oil plantations.