New logging roads are helping to spread the Spiked pepper tree (Piper aduncum), native to the American tropics, to areas further afield. It was first introduced to Indonesia in 1952, and at first its spread in Borneo was slow. However new observations have shown these trees are advancing along logging routes at a minimum rate of 5km each year. At this pace, the pepper trees threaten one of Borneo’s richest areas of flora.