Blue Flag | Iris Versicolor

Other Names

Fleur-De-Lis, Poison Flag, Harlequin Blueflag, Larger Blue Flag, Northern Blue Flag, Dragon flower, Water flag, Liver Lily, Clajeux, Iris, Iris caroliniana, Iris versicolor, Iris Versicolore, Iris virginica, Lirio Azul, Lis Bleu, Sweet Flag, Water Flag, Harlequin Blueflag, Larger Blue Flag, Northern Blue Flag, Verschiedenfarbige Schwertlilie, Schillernde Schwertlilie, Wurzelstock, Blätter


Blue-violet in color, the flower is a variety of the Iris. It has three downward sloping sepals that have yellow bases. The flower resembles a sword that extends to the same height. The Blue Flag spread and occur in small patches. The flowers are bisexual and bloom sequentially. Once fertilized, a three-sided seed pod arises.


Starch, gum, volatile oil, tannin, 25% acrid, resinous matter, salicylic acid, isophthalic acid, alkaloids, oleoresin, aglycoside, iridin

Collection Period

May to August

Used Parts



  • Biliary Disorders,

  • Blood Purification,

  • Burns,

  • Digestive Problems,

  • Dropsy,

  • Eczema,

  • Edema,

  • Heartburn,

  • Increases Production Of Bile,

  • Inflammatory Bowel Disease,

  • Liver Weakness,

  • Migraine,

  • Nerve Pain,

  • Pancreatic Weakness,

  • Phantom Pain,

  • Promoting Menstruation,

  • Psoriasis,

  • Skin Irritation,

  • Sinusitis,

  • Stomach Disorders,

  • Stomach Inflammation,

  • Ulcers,

  • Vomiting


Blue Flag is known to cure skin diseases. The plant is able to help address psoriasis and eczema. It is a diuretic, laxative and has anti-inflammatory properties. Thus, it can also be used against constipation and liver problems.

Modern herbalists prescribe the root which has been dried and pulverized to help with digestive problems. Being a blood purifier, it helps to clear skin conditions. It also helps increase bile production.


Recognized for its beauty and grace, the Blue Flag is the provincial flower of Quebec and is the official flower of the state of Tennessee. It is known to help clear the skin and help with digestive problems.

Side Effects

The Blue Flag’s sap can cause dermatitis among highly sensitive individuals.


  • Wikipedia, Iris versicolor: –

  • Voyageur Country, Iris, Blue Flag: Guide, Blue Flag:


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