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Definition of Musk thistle
1. Noun. Eurasian perennial naturalized in eastern North America having very spiny white cottony foliage and nodding musky crimson flower heads; valuable source of nectar.
Exact synonyms: Carduus Nutans, Nodding Thistle
Generic synonyms: Thistle
Group relationships: Carduus, Genus Carduus
Generic synonyms: Thistle
Group relationships: Carduus, Genus Carduus