Noun blessed thistle has 2 senses
  1. milk thistle, lady's thistle, Our Lady's mild thistle, holy thistle, blessed thistle, Silybum marianum - tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads; naturalized in California and South America
    --1 is a kind of herb, herbaceous plant
    --1 is a member of Silybum, genus Silybum
  2. blessed thistle, sweet sultan, Cnicus benedictus - annual of Mediterranean to Portugal having hairy stems and minutely spiny-toothed leaves and large heads of yellow flowers
    --2 is a kind of thistle
    --2 is a member of Cnicus, genus Cnicus
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