This map has been generated by Mapmate 20/03/2012
Distribution:
Occasional with an increasing number of records as casuals and deliberate introductions.
Habitat:
Waste ground, pavements, tips and canal towpaths.
Comments:
Neophyte, native to north America. The earliest record traced was from the Ramsden Wood area (SD92F, J & H Lowell, 1996).