NPSpecies

Data Source: Judziewicz, E. J. 2003.

Known in Michigan only from wet ground at ISRO (Voss, 1985).; Data Source: USDA, NRCS. 2004.

Rare, Brady Cove, Tobin Harbor, and low muddy area in forest on Passage Island.; Data Source: Slavick, A D and R A Janke. 1993.

Park Species Detail: BONAP Author = Britt.; Reference = MI1 Michigan Threatened designation., Park Species Data Source: Judziewicz, E. J. 2003. Review of vascular plant species lists for nine Midwestern National Parks, Monuments, Lakeshores and Riverways: A final report.; Slavick, A D and R A Janke. 1993. The Vascular Flora of Isle Royale National Park, 3rd edition. Isle Royale Natural History Association, Houghton, MI.; USDA, NRCS. 2004. The PLANTS Database, Version 3.5 (http://plants.usda.gov). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.