Common Name: white snakerootScientific Name: Eupatorium rugosum Houtt. syn. Ageratina altissimaFamily Name: Asteraceae (Compositae) - Aster or Sunflower FamilyIdentification NotesLife Cyclenative perennial, spreading by seed and rhizomes Stemstall, smooth, branched above Leavesopposite, ovate to sometimes heart-shaped, square base, sharp-pointed, toothed margins, long petioles Flowersheads of white disk (tubulate) florets, small; terminal flat-topped clusters