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Canada thistle

American  

noun

  1. an Old World plant, Cirsium arvense, having small purple or white flower heads, now a troublesome weed in North America.


Canada thistle British  

noun

  1. the US and Canadian name for creeping thistle

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of Canada thistle

An Americanism dating back to 1790–1800

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Canada thistle, a spindly purple-flowered weed native to southeastern Europe, likely came to North America in the 1600s in a batch of contaminated seed or in the ballast of a ship.

From Seattle Times • Jun. 11, 2022

Many look for nectar on dandelion, rabbitbrush, Canada thistle, osier dogwood and chokecherry.

From Seattle Times • Aug. 27, 2021

They are targeting Johnson grass, giant foxtail, Canada thistle, nodding thistle, common teasel, multiflora rose, Amur honeysuckle, poison hemlock, marestail, Japanese knotweed and kudzu.

From Washington Times • Mar. 18, 2021

The state’s contractor, Ed’s Plant World of Brandywine, is going after porcelain-berry, kudzu, Canada thistle and mile-a-minute weed, among other species.

From Washington Post • Aug. 27, 2016

"You might as well call for a Canada thistle," laughed Duncan, who was one of the best French scholars in the Josephine.

From Dikes and Ditches Young America in Holland and Belguim by Optic, Oliver