]> GH barcode-00353582 United States of America Maryland W of Berryville Rd, 3/4 mi SW of Rte. 28 (Darnestown Road) near Seneca Creek; 2 mi W of Darnestown Persicaria perfoliata (Linnaeus) H. Gross (Linnaeus) H. Gross 2021-10-22 12:42:17 S. R. Hill