Light purple flowers, long seed pods and alternate, wavy leaflets with smooth margins distinguish this woody vine. Japanese and Chinese wisteria differ mainly by the directional rotation of the vine around a tree — counter-clockwise or clockwise, respectively. Although both are invasive and difficult to control or eradicate, Chinese is worse. The least aggressive is American wisteria.
Cut the vine at the ground and pull all the roots out to effectively remove this plant. For large vines cut with a hand saw or battery operated sawzall near the ground, or use a chain saw above the ground; and dig out large roots with a pulaski tool, mattock or weed wrench. Click Vine Removal for details regarding ivy and vine removal from a host tree. Where possible, the twined vines should also be carefully cut from the tree trunk. And because any portion of the root remaining on the ground may sprout, soft wood cuttings and seed pods should be bagged and disposed.