New distributional records of non-native vascular plants in northern Italy Author Verloove, Filip Botanic Garden of Meise, Nieuwelaan 38, B- 1860 Meise, filip.verloove@br.fgov.be Author Ardenghi, Nicola M. G. Department of Earth and Environmental Sciences, University text Natural History Sciences 2015 2015-06-30 2 1 5 14 http://dx.doi.org/10.4081/nhs.2015.219 journal article 10.4081/nhs.2015.219 2385-0922 12523705 Persicaria pensylvanica ( L .) M .Gómez , Anales Inst. Segunda Enseñ. , 2: 278. 1896. ( Polygonaceae ) Naturalized neophyte new for the flora of the province of Mantova ( Lombardia ) ( Banfi & Galasso, 2010 ). ITALY . Lombardia . Prov. Mantova: Viadana , river Po W of the bridge, sandy river bank, few plants, 15.09.2014 , F . Verloove 11058 ( BR ) . A native of North America , this species became naturalized in Europe , especially in riparian habitats. In Italy it is known from the northernmost regions ( Celesti-Grapow et al. , 2009a ). It is here reported for the first time from Mantova province in Lombardia . Fig. 4 - Perilla frutescens , Basaluzzo (AL) , September 2014 (Photo: F. Verloove). This species is obviously naturalized along river Po but usually occurs in small populations. It does not seem to be an aggressive invader.