blessed thistle(redirected from Carduus benedictus)
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An annual yellow-flowered herb (Cnicus benedictus) in the composite family, having spiny leaves and used in herbal medicine.
[From its use by monks in the Middle Ages.]
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|Noun||1.||blessed thistle - tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads; naturalized in California and South America|
|2.||blessed thistle - annual of Mediterranean to Portugal having hairy stems and minutely spiny-toothed leaves and large heads of yellow flowers|
thistle - any of numerous plants of the family Compositae and especially of the genera Carduus and Cirsium and Onopordum having prickly-edged leaves