News flash: "....The dismantling of Polygonum sensu lato has been gradually gaining favor since the earlier papers of Haraldson (1978) and Ronse Decraene & Akeroyd (1988). For example, it is adopted in the Med-Checklist, the Flora of Japan (2006), in Families and Genera of Vascular Plants (Brandbyge in Kubitzki, 1993), and will be adopted in the upcoming Flora of Australia (fide Wilson 1990). In GRIN we chose to retain Polygonum in its original sense until the Flora of North America treatment appeared (in vol. 5. 2005), since all North American floras had ignored this split as well. Once FNA endorsed this view our GRIN data were converted to agree with them...." [John H. Wiersema, Ph.D.Curator of GRIN Taxonomy (www.ars-grin.gov/cgi-bin/npgs/html/index.pl)United States Department of Agriculture/Agricultural Research Service Systematic Botany & Mycology Laboratory Bldg. 011A, Beltsville Agricultural Research Center (BARC-West)Beltsville, MD 20705-2350 U.S.A.Tel: 1-301-504-9181 Fax: 1-301-504-5810 Email: email@example.com]; [picture of mile-a-minute weed courtesy of Jil M. Swearingen, U.S. National Park Service, Washington, DC]
Mile-a-minute weed had been changed to Persicaria perfoliata previously recognized as a synonym for Polygonum perfoliatum, which has been the accepted name for a number of years now. Just when you thought you knew 'em, they get an also know as.