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Definition of Onopordon acanthium
1. Noun. Biennial Eurasian white hairy thistle having pale purple flowers; naturalized in North America.
Exact synonyms: Cotton Thistle, Onopordum Acanthium, Scotch Thistle, Woolly Thistle
Generic synonyms: Thistle
Group relationships: Genus Onopordon, Genus Onopordum, Onopordon, Onopordum
Generic synonyms: Thistle
Group relationships: Genus Onopordon, Genus Onopordum, Onopordon, Onopordum