European thistle naturalized in United States and Canada where it is a pernicious weed.
European thistle naturalized in United States and Canada where it is a pernicious weed.
美国和加拿大已引入的欧洲蓟，它是一种有害的杂草。
European thistle naturalized in United States and Canada where it is a pernicious weed.
美国和加拿大已引入的欧洲蓟，它是一种有害的杂草。