A lone plant from a ditch In eastern Saskatchewan (photo Don Battiste, 2013)

My favorite invasive plant - a purple loosestrife growing in a crack in the sidewalk near the Toronto Ariport. Photo: Don Battiste

At the Toronto Zoo. (with the Snowy Owl) Photo: Don Battiste

The author ready to do Early Detection Rapid Response EDRR (photo Don Battiste, 2013)

Medicine Hat garden in August 2011. Note the upright spiky form that gardeners will want to replace in finding alternatives

A lone plant from a ditch In eastern Saskatchewan (photo Don Battiste, 2013)