Canada Thistle (Cirsium arvense) Cirsium arvense |
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| Why Like | Invasive plant with painful spines spreads quickly in disturbed areas via cotton-like seeds as well as lateral roots spreading as far as 20 feet from the parent. It does have pretty purple flowers. |
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| I am a... | Deciduous Perennial |
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Photos: Google Image Search & Flickr |
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