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Noun: woolly thistle
  1. Biennial Eurasian white hairy thistle having pale purple flowers; naturalized in North America
    - cotton thistle, Scotch thistle, Onopordum acanthium, Onopordon acanthium
     
  2. Thistle of western North America having white woolly leaves
    - Cirsium flodmanii

Derived forms: woolly thistles

Type of: plume thistle, plumed thistle, thistle

Part of: genus Onopordon, genus Onopordum, Onopordon, Onopordum