Blue Flag is a herb with the botanical name of Iris versicolor or Iris caroliniana. It is also known as Dagger Flower, Dragon Flower, Flag Lilly and Liver Lilly.
Cultivation has produced a great number of varieties of irises, including Blue Flag which has a fleshy, creeping rootstock or rhizome. The best time to harvest the herb is in autumn. The rhizome harvested is subcylindrical in shape and about 2 cm in diameter. It is flattened at the larger end where the cup shaped stem scar can be seen. The plant has an acrid taste and a slight aromatic odour.
The rhizome is the part used in herbal medicine because it contains several active constituents including acids. Other constituents include an alkaloid, tannins, resins, starch and a small quantity of volatile oil.
Herbal supplements can alter the effects of certain drugs, including prescription medications. Always tell your Doctor about any prescription medications, non-prescription medications, herbs or other dietary supplements you are taking. - Blue Flag contains substances called tannins, which can reduce the absorption of iron supplements.
Always consult your Health Professional to advise you on dosages and any possible medical interactions. Blue Flag is believed to act as a circulatory and lymphatic stimulant and has been used for skin conditions associated with sluggish liver, bowel or poor detoxification. Blue Flag also has an anti-inflammatory activity and has been used traditionally for skin conditions such as eczema, acne and psoriasis.
Cholagogue (stimulates the flow of bile from the liver), diuretic, antiemetic, anti-inflammatory, laxative.
NOTES- Do not use during pregnancy and breastfeeding. - Possible side effects include stomach upset, eye inflammation, throat irritation, headache.