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Clitoria fragrans : ウィキペディア英語版 | Clitoria fragrans
''Clitoria fragrans'' is a rare species of flowering plant in the legume family known by the common name pigeon wings, or sweet-scented pigeon wings. It is endemic to Central Florida, where it was known most recently from 62 occurrences,〔(''Clitoria fragrans''. ) The Nature Conservancy.〕 but no current estimates of the total global population are available.〔USFWS. (''Clitoria fragrans'' Five-year Review. ) September 15, 2008.〕 The plant is a federally listed threatened species of the United States. ==Characteristics== It a perennial herb or subshrub which grows up to half a meter tall from a woody taproot, sometimes reaching one meter. The slender, purplish, slightly waxy-textured stems have leaves alternately arranged. Each leaf has three elongated oblong or lance-shaped, bristle-tipped green leaflets each up to 4.5 centimeters in length. The inflorescences occur in leaf axils, each bearing one or two fragrant blooms. The flower may be up to 5 centimeters long and is mostly pale pinkish purple with darker rose-pink streaks at the center and a white spot below. The flower is resupinate, with the reproductive parts curving around to point toward the back of the corolla; this forces a visiting insect to rub against them and thereby transfer pollen.〔〔Palazzo, A. J., et al. (2007). (A review of the growth habits and restoration issues for ''Clitoria fragrans'' and ''Polygonella basiramia''. ) US Army Corps of Engineers Cold Regions Research and Engineering Laboratory.〕 A second type of flower often occurs which is cleistogamous: self-pollinating and not actually opening into a corolla. The cleistogamous flower is more common in general, but the type with the showy open corolla may be more common in the seasons after a wildfire.〔 Both types bear fruit, a legume pod up to 5 centimeters long containing up to 9 reddish seeds a few millimeters in length. The seeds are sticky in texture and are dispersed when they adhere to animals.〔
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