]> GH barcode-01919093 United States of America Michigan Duck Lake-Lake George of St. Mary's River, Sugar Island, ca. 10 miles SE of Sault St. Marie. Sec. 26, T47N, R2E. Heteranthera dubia MacMillan MacMillan 2021-01-28 13:41:26 C. B. Hellquist & R. R. Haynes