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woolly thistle, Cirsium flodmanii | thistle of western North America having white woolly leaves ❲Cirsium flodmanii❳ | |
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woolly thistle, cotton thistle, Scotch thistle, Onopordum acanthium, Onopordon acanthium | biennial Eurasian white hairy thistle having pale purple flowers; biennial Eurasian white hairy thistle having pale purple flowers; naturalized in North America ❲Onopordum acanthium, Onopordon acanthium❳ |