The Cirsium arvense.
1799. A torvous, stubborn, and vexatious weed, known by the name of the Canada thistle.—Mass. Spy, July 31.
1819. A labourer pointed out to me a piece of ground covered with the Canada Thistle.—Id., June 16: from the Pittsfield Sun.
1829. CANADA THISTLE. This noxious weed appears to be disseminating itself throughout the country.—Id., July 23.
1850. I should advise him to keep his Canada thistles at home.—Mr. Clarke of N.Y., House of Repr., May 13: Cong. Globe, p. 565 (Appendix).
