]> A barcode-01788875 United States of America Arkansas town of Pencil Bluff. 0.72 km E of intersection of U. S. route 270 and Ark. route 88, then right for 0.24 km, then left for 0.08 km to shale bluffs overlooking the Ouachita River. Ceanothus americanus Linnaeus Linnaeus 2021-03-05 20:23:21 E. W. Wood, V. M. Bates & D. E. Boufford