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Iris versicolor
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Iris versicolor, also commonly known as the Harlequin Blueflag the Blue Flag Iris and other varitations of those names, is a species of Iris native to North America where it is common in sedge meadows, marshes, and along streambanks and shores.
I. versicolor is a perennial herb, usually 10-80 centimeter. high. This iris tends to form large clumps from thick, creeping rhizomes. The unwinged, erect stems generally have basal leaves that are more than 1 cm. wide. Leaves are folded on the midribs so that they form an overlapping flat fan. The well developed blue flower has 6 petals and sepals spread out nearly flat and have two forms. The longer sepals are hairless and have a greenish-yellow blotch at their base. The inferior ovary is bluntly angled. Flowers are usually light to deep blue and in bloom during May to July. Fruit is a 3-celled, bluntly angled capsule. The large seeds can be observed floating in the fall.
The species has been implicated in several poisoning cases of humans and animals who consumed the
rhizomes, which have been found to contain a
glycoside,
iridin. The
sap can cause
dermatitis in susceptible individuals.
The blue flag is the provincial flower of Quebec, having replaced the Madonna lily which is not native to the province.
Reference
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