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Definition of Lady's thistle
1. Noun. Tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads; naturalized in California and South America.
Exact synonyms: Blessed Thistle, Holy Thistle, Milk Thistle, Our Lady's Mild Thistle, Silybum Marianum
Group relationships: Genus Silybum, Silybum
Generic synonyms: Herb, Herbaceous Plant
Group relationships: Genus Silybum, Silybum
Generic synonyms: Herb, Herbaceous Plant