When is a non-native species invasive? – The Prairie Ecologist

There are good definitions of both non-native species and invasive species but the two terms are often erroneously used interchangeably.  This has created a lot of confusion lately about whether or not invasive species should be seen as a problem.  Read thoughts here about invasive species in Nebraska’s prairies.

http://prairieecologist.com/2011/09/13/purist-or-pragmatist-identifying-and-addressing-non-native-vs-invasive-species-in-prairies/

Goatsbeard, aka salsify, is non-native but not invasive.