(tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads
naturalized in California and South America)
milk thistle, lady's thistle, Our Lady's mild thistle, holy thistle, blessed thistle, Silybum marianum

Mediterranean milk thistle

cardus marianus

milk thistle

Saint Mary's Thistle

Scotch thistle

variegated thistle

Mary Thistle

Silybum marianum

Marian Thistle

blessed milk thistle