]> GH barcode-00403680 United States of America California Black Butte Reservoir (west side), about 3 miles north of the bridge across Stony Creek and the upper reaches of Black Butte Reservoir. T22N, R5W, northeast 1/4 Section 12 Persicaria amphibia (Linnaeus) Delarbre (Linnaeus) Delarbre 2014-01-09 15:03:04 L. Ahart