Noun: Our Lady's mild thistle
- Tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads; naturalized in California and South America
"Our Lady's mild thistle is often used in herbal medicine for liver problems";
- milk thistle, lady's thistle, holy thistle, blessed thistle, Silybum marianum
Type of: herb, herbaceous plant
Part of: genus Silybum, Silybum