Not a nice thing to say about an invited guest, but nearly 150 years after its importation in 1866 from Asia as rootstock for ornamental roses, multiflora rose has long overstayed its welcome. The Tennessee Exotic Pest Plant Council ranks this “shrub” as a severe threat to native ecosystems. It has all of the marks of an invasive exotic, but one of its least desirable habits is its tendency to climb high into trees. This photograph shows the plant 20 feet up a bald-cypress tree. On forest edges it can form an almost impenetrable thicket that impedes the growth of native plants. Multiflora rose has naturalized throughout eastern North America and along the Pacific coast. For information on how to control the plant, see this bulletin.