Helxine may refer to: a genus of plants in the nettle family Urticaceae containing a single species, Helxine soleirolii, a synonym of Soleirolia soleirolii a genus of plants in the knotweed family Polygonaceae, including the following species Helxine convolvulus, a synonym of Fallopia convolvulus Helxine multiflorum, a synonym of Reynoutria multiflora Helxine scandens, a synonym of Fallopia scandens Helxine saggitatum, a synonym of Persicaria sagittata