A genus of spiny plants commonly called thistles, known for their prickly leaves and purple or pink flower heads.
From Latin carduus (thistle), of uncertain origin but possibly related to Proto-Indo-European roots meaning 'to turn' or 'to twist,' referencing the plant's twisted, spine-covered appearance.
Thistles are ecological superstars—they're one of Scotland's national symbols, yet they feed more insects, birds, and other animals than many 'prettier' flowers, making them invisible powerhouses of biodiversity.
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