The invasion and expansion of three North American species of goldenrod (Solidago canadensis L. sensu lato, S. gigantea Ait. and S. graminifolia (L.) Salisb.) in Poland

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith