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Canada thistle
DCHP-1 (pre-1967)
Entry from the DCHP-1 (pre-1967)
This entry may contain outdated or offensive information, terms, and examples.
a thistle, Cirsium arvense, introduced into Canada from France.
See: Canadian thistle
Quotations
1829
The plant is so rank that . . . it has even been said that it will exterminate the Canada thistle.
1964
For some time, weed specialists have sought a chemical that would not only kill the tops of Canada thistle, but would destroy underground growth without sterilizing the soil.