Monterey pine (P.radiata D.Don) promises to be one of the most valuable and important plants ever introduced into Australia. It is not known for certain when it was first introduced, but the earliest record of its being in Australia known to the writer is its inclusion in a list of plants received by the Sydney Botanic Gardens in 1857. Baron F.V. Mueller, who played an active part in distributing the species in southern Australia, recorded Monterey pine as growing in the Melbourne Botanic Gardens in 1858. The establishment of forest plantations of Monterey pine began towards the end of the last century, and the species now comprises a much greater area of plantations in Australia than any other forest tree. It is by far the most important softwood species in the Commonwealth, and although most of the plantations are relatively immature, it probably already yields a greater value of products than any other species of forest tree in Australia. There is every indication that Monterey pine will be planted on a large scale for many years, and that its importance in the Australian economy will increase greatly in the future.