Schematically, the plant formations of New Caledonia are organized according to the altitude, from the mangroves of the coastal areas to the savannahs and forest galleries of the inland. The vegetation decreases along the slopes of the massifs and when the force of the winds opposes the progression of the tree species. Between 2,952 and 4921ft (900-1500m), the forest is composed exclusively of conifers, mainly Araucaria, and is gradually replaced by a shrubby formation of subalpine scrub.