Canada thistle


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Canada thistle

n.
A perennial herb (Cirsium arvense) in the composite family, native to Europe and naturalized as a noxious weed in North America, having spiny-margined leaves and rose-purple or sometimes white flower heads.

Canada thistle

n
(Plants) the US and Canadian name for creeping thistle

Can′ada this′tle


n.
an Old World prickly composite plant, Cirsiumarvense, having small purple or white flower heads, now a troublesome weed in North America.
[1790–1800, Amer.]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Canada thistle - European thistle naturalized in United States and Canada where it is a pernicious weedCanada thistle - European thistle naturalized in United States and Canada where it is a pernicious weed
plume thistle, plumed thistle - any of numerous biennial to perennial herbs with handsome purple or yellow or occasionally white flower heads
References in classic literature ?
Some gamesome wights will tell you that they have to plant weeds there, they don't grow naturally; that they import Canada thistles; that they have to send beyond seas for a spile to stop a leak in an oil cask; that pieces of wood in Nantucket are carried about like bits of the true cross in Rome; that people there plant toadstools before their houses, to get under the shade in summer time; that one blade of grass makes an oasis, three blades in a day's walk a prairie; that they wear quicksand shoes, something like Laplander snowshoes; that they are so shut up, belted about, every way inclosed, surrounded, and made an utter island of by the ocean, that to their very chairs and tables small clams will sometimes be found adhering, as to the backs of sea turtles.
But whichever garden you have, be watchful for three cool season annual weeds that overwinter here, appear early, and can wreak havoc on any garden: Canada thistle, quack grass and field bindweed.
Carmen Fernholz has been growing hay organically for more than 40 years, and he says it pays off in three ways: He has a strong market of organic dairy producers, it builds soil for his crop rotation, and it controls Canada thistle.
Their job was to chow down on Canada thistle, leafy spurge, common tansy, common burdock, yellow toadflax and dandelions, while under the watch of a skilled shepherd and several herding horses and dogs.
Come spring, I prepared the trenches, planted the roots and then, along with the emerging asparagus, came the brome grass, Canada thistle, and a million varieties of annual weeds.
* Avoid tilling overly aggressive or invasive plants that produce rootbuds, such as crabgrass, johnsongrass, bindweed or Canada thistle. Dig them out by hand.
If you're not aware, Canada thistle is a noxious weed that's also obnoxious if you're trying to crawl through it.
Asked what her sales pitch might be to groups considering signing up for a twice-a-year stint pulling up gorse, Canada thistle, Scotch broom and other noxious weeds, Morrison paused and chuckled.
thistle, holy thistle, Syrian thistle, golden thistle, Canada thistle,
Ziska has also collaborated on work showing that cheatgrass and Canada thistle flourish when C[O.sub.2] levels rise.
Canada thistle, bermuda grass, leafy spurge, dandelion, and Johnsongrass can spread asexually and can regenerate from perennial structures (Figures 14-5 and 14-6).

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