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Iris versicolor
''Iris versicolor'' is also commonly known as the Blue Flag, Harlequin Blueflag, Larger Blue Flag, Northern Blue Flag,〔ROM Field Guide to Wildflowers of Ontario. Toronto:Royal Ontario Museum, 2004.〕 and Poison Flag, plus other variations of these names,〔(【引用サイトリンク】 url=http://ontariowildflowers.com/main/species.php?id=508 )〕〔 Thomas Lathrop Stedman (editor)〕 and in Britain and Ireland as Purple Iris.
It is a species of ''Iris'' native to North America, in the Eastern United States and Eastern Canada. It is common in sedge meadows, marshes, and along streambanks and shores. The specific epithet ''versicolor'' means "variously coloured".
It is one of the three ''Iris'' species in the ''Iris'' flower data set outlined by Ronald Fisher in his 1936 paper "The use of multiple measurements in taxonomic problems" as an example of linear discriminant analysis.
==Description==
''Iris versicolor'' is a flowering herbaceous perennial plant, growing 10–80 centimetres 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 (purple and violet are not uncommon) and bloom during May to July. Fruit is a 3-celled, bluntly angled capsule. The large seeds can be observed floating in fall.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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