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''Clematis occidentalis'' is a species of flowering plant in the buttercup family known by the common name western blue virginsbower. It is native to much of southern Canada and the northern United States. There are three varieties: var. ''occidentalis'' is limited to the eastern half of the species' range, var. ''grosseserrata'' to the western half, and var. ''dissecta'' is endemic to Washington. The plant varies somewhat in appearance. Generally they produce vines and climb on surfaces. The leaves are divided into three thick, green leaflets, which may have lobes or teeth. The flower has no petals, but petallike sepals which are usually either deep purple-blue in western populations or reddish purple in eastern plants. White flowers are rare. The Latin name ''Clematis occidentalis'' means long supple branches from the west. ==External links== * *(USDA Plants Profile ) *(Flora of North America ) 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「Clematis occidentalis」の詳細全文を読む スポンサード リンク
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