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''Oxalis montana'' is a species of flowering plant in the Oxalidaceae known by the common names mountain woodsorrel, wood shamrock, sours and white woodsorrel. It may also be called common woodsorrel, though this name also applies to its close relative, ''Oxalis acetosella''. This species is native to eastern North America, including eastern Canada and the north-central and eastern United States, and Appalachian Mountains.〔Pavek, Diane S. (1992) (''Oxalis montana''. ) In: Fire Effects Information System, (). U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Retrieved 12-04-2011.〕 ==Description== ''Oxalis montana'' is a perennial herb which grows in patches connected by subterranean rhizomes. There are no stems, just clumps of leaves growing to about in maximum height. The leaves are each made up of three heart-shaped leaflets.〔 The leaflets move, folding and unfolding, in response to sunlight.〔Comerro, H. K. and G. Briggs. (2000). (Effects of leaflet orientation on transpiration rates and water potentials of ''Oxalis montana''. ) ''SUNY Geneseo Journal of Science and Mathematics''. 1(1) 7-10. Retrieved 12-04-2011.〕 There are two types of flowers, blooms that open and cleistogamous flowers that remain closed and self-pollinate.〔Jasienuik, M. and M. J. Lechowicz. (1987). (Spatial and temporal variation in chasmogamy and cleistogamy in ''Oxalis montana'' (Oxalidaceae). ) ''American Journal of Botany'' 74(11) 1672-80. Retrieved 12-04-2011.〕 The flower color is variable. Environmental factors may cause variation; flowers growing at higher elevations have less color in the veins on the petals, while the veins of those at lower elevations have a deeper pink-purple coloration.〔Gates, S. C. and H. W. Vogelmann. (1969). (Variations in populations of ''Oxalis montana'' Raf. ) ''Bulletin of the Torrey Botanical Club'' 96(6) 714-19. Retrieved 12-04-2011.〕 The fruit is a capsule. The plant reproduces sexually by seed and asexually by sprouting large colonies from the rhizome.〔 Some populations produce no flowers in a given season and reproduce only vegetatively.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Oxalis montana」の詳細全文を読む スポンサード リンク
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