]> GH barcode-01732959 United States of America Michigan Black Mallard River, 1 mi S of Grace, US 23, Sec. 1, T36N, R2E Stuckenia pectinata (Linnaeus) Börner (Linnaeus) Börner 2021-03-07 06:33:13 C. B. Hellquist & R. R. Haynes