]> GH barcode-01924403 United States of America Arkansas Boston Mts.: Ozark National Forest-Sylamore Ranger District. Barkshed Recreational Area on North Sylamore Creek, about 10 miles S. W. of Calico Rock. Ageratina altissima (Linnaeus) R. M. King & H. Robinson (Linnaeus) R. M. King & H. Robinson 2021-02-09 12:11:55 [data not captured]