This unusually vigorous semi-woody vine with tuberous roots has been promoted across southeastern states for forage and erosion-control, especially on abandoned farmland during the 1930s. Potentially up to 20 m or more high, it climbs with twining shoots that can appear somewhat tendrillate. It has become an invasive problem in some areas, especially along woodland edges, but it rarely produces seed and does not generally spread into woods or native grasslands. Plants are generally palatable to herbivorous mammals. There have been many trials with goats to reduce this species in southeastern states, including Ky., but there has been little continued effort or research program (Bonsi et al. 1992). In Ky. it is most common to the south, and its northern boundary lies close to the Ohio Rv. P. montata is a widespread, variable species in East Asia. North American plants may all be referred to var. lobata (Ohwi) Maesen & Almeida, which has been distinguished by its lobed leaves and perhaps other characters, but further revision is probably needed (Ward 1997).