Synonyms of woolly thistle
- 1. cotton thistle, woolly thistle, Scotch thistle, Onopordum acanthium, Onopordon acanthium, thistle
- usage: biennial Eurasian white hairy thistle having pale purple flowers; naturalized in North America
- 2. woolly thistle, Cirsium flodmanii, plume thistle, plumed thistle
- usage: thistle of western North America having white woolly leaves
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