blessed thistle is a noun meaning "tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads; naturalized in California and South America". It carries 2 recorded senses.
annual of Mediterranean to Portugal having hairy stems and minutely spiny-toothed leaves and large heads of yellow flowers
Definitions, synonyms and semantic relations for blessed thistle come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.