]> GH barcode-00231735 United States of America Alabama Ca. 15.5 km SW of Selma, ca. 17.5 km SE of marion Junction, and ca. 2.4 km WSW of Old Cahaba; S side Co. Rd. 2 at jct. Co. Rd. 9 Silphium perplexum J. R. Allison J. R. Allison 2014-09-08 15:58:38 J. R. Allison