noun Date: 1799 a European thistle ( Cirsium arvense ) with pinkish-purple or white flowers naturalized as a weed in North America
CANADA THISTLE
Meaning of CANADA THISTLE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012