New and noteworthy records of several non-native vascular plant species in Arkansas

摘要

Collections of nine species of vascular plants, all non-native to the United States, are reported as new or noteworthy for Arkansas. Three species, Marsilea quadrifolia, Pennisetum setaceum, and Thunbergia alata, are reported as new to Arkansas. Amaranthus blitum and Chamaesyce ophthalmica are reported for their second occurrence in Arkansas. An additional county record for each of three federally listed invasive species is reported: Eichhornia crassipes, Hydrilla verticillata, and Myriophyllum spicatum. The current known distribution of 2uercus acutissima in Arkansas is provided. Finally, some instances of localized reproductive spontaneity originating from cultivated plants are reported. These include: Acer palmatum (Japanese maple), Camellia japonica, (common camellia), Camellia sasanqua (fall-flowering camellia, Loropetalum chinense (fringe flower), Raphiolepis indica (Indian hawthorn), and Ternstroemia gymnanthera (cleyera), all of which were previously undocumented in Arkansas in this condition.