Iris versicolor

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Noun1.Iris versicolor - a common iris of the eastern United States having blue or blue-violet flowersIris versicolor - a common iris of the eastern United States having blue or blue-violet flowers; root formerly used medicinally
fleur-de-lis, iris, sword lily, flag - plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals