blue flag

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A perennial herb, the dried rhizome of which contains alkaloids, salicylates, starch, and tannins; it is antiemetic and carminative, and has been used for eructation, headache, cramps, rheumatic complaints, to increase the flow of bile, and is said to remove toxins from the blood
Toxicity Fresh blue flag root is poisonous
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

blue flag

(blū flag)
Herbal derived from Iris versicolor; purported value as an antiinflammatory, laxative, diuretic; human poisoning reported and use contraindicated.
Synonym(s): dagger flower, fleur-de-lis, liver lily, poison flag.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012