| 1. woolly thistle [ Synonyms: cotton thistle, onopordon acanthium, onopordum acanthium, scotch thistle] | |
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Biennial Eurasian white hairy thistle having pale purple flowers; naturalized in North America
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| 2. woolly thistle [ Synonyms: cirsium flodmanii] | |
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Thistle of western North America having white woolly leaves
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