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