blessed thistle

名词 blessed thistle:

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