Definition of BLESSED THISTLE
- » milk thistle, lady's thistle, Our Lady's mild thistle, holy thistle, Silybum marianum: tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads; naturalized in California and South America
- » sweet sultan, Cnicus benedictus: annual of Mediterranean to Portugal having hairy stems and minutely spiny-toothed leaves and large heads of yellow flowers