United States, Minnesota, Sherburne, 1.25 mi E of the middle of Lake Ann in Sand Dunes State Forest. SW1/4 NE1/4 sec.23, T34N R27W;Sand Dunes State Forest;034N;27W;23
45.421968 -93.663561 +-800m. WGS84
Growing in central portion of a small wet depression (dry this year) dominated by a nearly continuous, 1 mi tall network of Polygonum sagittatum. With Polygonum natans, Lycopus uniflorus, Glyceria etc