United States, Minnesota, Wabasha, T 109N R 9W, NE1/4 NE1/4 section 19. 1.6 km due east of U.S. Highway 61. [Upper Mississippi National Wildlife Refuge]
44.229186 -91.93937 +-800m. WGS84
Small pond in swampy woods. Forming a solid growth on the surface of water. Submersed vegetation included: Ceratophyllum demersum and Elodea canadensis.