What is a rosaceous herb (Potentilla Tormentilla), the root of which is used as a powerful astringent, and for alleviating gripes, or tormina, in diarrhea called?

tormentil — A rosaceous herb (Potentilla Tormentilla), the root of which is used as a powerful astringent, and for alleviating gripes, or tormina, in diarrhea. (Webster's 1913.)

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