Any of several Old World coarse prickly-leaved shrubs and subshrubs having milky juice and yellow flowers; widely naturalized; often noxious weeds in cultivated soil.

synonym: sow thistle.

Polish: łyczoga, mlecz

Tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads; naturalized in California and South America.

synonyms: blessed thistle, holy thistle, lady's thistle, Our Lady's mild thistle, Silybum marianum.

Polish: ostropest plamisty