NPSpecies

Data Source: Emmet Judziewicz species list review, 2003. Pavlovic et al. 2001.

Eurasian and western North American variant occasionally escaped from cultivation or native to Appalachian and Ozark regions.; Data Source: Voss 1985

Data Source: Pavlovic et al. 2001

Park Species Data Source: Pavlovic et al. 2001. Int'm report: survey and ranking of non-indigenous, invasive plants of 4 nat'l lakeshores: 1998-2000. USGS. Porter, IN. Voss, E. G. 1985. Mich. Flora, Vol. II. Cranbrook Inst. Sci. Bull. #59 & Univ. of Mich. Herb. Ann Arbor, MI. Judziewicz, Emmet J. 2003. Review of vascular plant species lists for nine Midwestern National Parks, Monuments, Lakeshores and Riverways: A final report. UW-Stevens Point. Stevens Point, WI.