Thistle | ||||||||||||
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Scientific Classification | ||||||||||||
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Thistles are flowering plants of the genus Cirsium. They are known for their effusive flowered heads (usually purple, rose, yellow, or white) and prickly stems and leaves, with a characteristic focal point at the base of the flower which is particularly spiny. Most species are considered weeds, but some are cultivated in gardens for their aesthetic value.