]> A barcode-00961180 United States of America Arkansas ESE of the town of Mena, 0.8 km (0.5 mile) S of Arkansas route 8 on U. S. Forest Service Road 43 along Wahunt Creek; Caddo Mts., Ouachita National Forest. Asclepias quadrifolia Jacquin Jacquin 2021-02-18 18:55:11 D. E. Boufford, V. M. Bates & E. W. Wood