NPSpecies

Both native and non-native populations probably exist.; Data Source: Judziewicz, E J. 2004.

Those populations near houses and cabins throughout park are assumed to be European (non-native) garden cultivars. As long as they are kept separate from native populations, they do not pose a threat to native population.; Data Source: USDA, NRCS. 2004.

Uncommon, rock shore crevices and pools of Blake Point, Cork Island, Captain Kidd Island, and Passage Island.; Data Source: Slavick, A D and R A Janke. 1993.

Park Species Detail: BONAP Author = L.; Reference = MI1 Michigan Threatened designation. There is a chance that cultivars were dug from native populations from rock shoreline crevices on Passage Island, SW shore of Captain Kidd Island, Cork Island, and Blake Point. This is speculative, however., Park Species Data Source: BONAP County Database; Judziewicz, E J. 2004. Inventory and establishment of monitoring programs for special floristic elements at Isle Royale National Park, Michigan. Department of Biology, University of Wisconsin - Stevens Point, Stevens Point, WI.; 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.