A tale of two thistles: Pitcher’s and Canada

… below. Article content Since Canada thistles are not particularly … intended to selectively reduce Canada thistles, but that had … on Manitoulin Island, where Canada’s largest concentration of … .org and search for Native Thistles: A Conservation Practitioner …… below. Article content Since Canada thistles are not particularly … intended to selectively reduce Canada thistles, but that had … on Manitoulin Island, where Canada’s largest concentration of … .org and search for Native Thistles: A Conservation Practitioner …