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''Salix exigua'' (sandbar willow, narrowleaf willow, or coyote willow; syn. ''S. argophylla, S. hindsiana, S. interior, S. linearifolia, S. luteosericea, S. malacophylla, S. nevadensis,'' and '' S. parishiana'') is a species of willow native to most of North America except for the southeast and far north, occurring from Alaska east to New Brunswick, and south to northern Mexico.〔Germplasm Resources Information Network: (''Salix exigua'' )〕 It is a deciduous shrub reaching in height, spreading by basal shoots to form dense clonal colonies. The leaves are narrow lanceolate, long and broad, green, to grayish with silky white hairs at least when young; the margin is entire or with a few irregular, widely spaced small teeth. The flowers are produced in catkins in late spring, after the leaves appear. It is dioecious, with staminate and pistillate catkins on separate plants, the male catkins up to long, the female catkins up to long. The fruit is a cluster of capsules, each containing numerous minute seeds embedded in shiny white silk.〔Northern Prairie Wildlife Research Center: (''Salix exigua'' )〕〔Jepson Flora: (''Salix exigua'' )〕 The two subspecies, which meet in the western Great Plains, are:〔〔 *''S. e. exigua'' - western North America, leaves grayish all summer with persistent silky hairs, seed capsules long *''S. e. interior'' (Rowlee) Cronq. (syn. ''S. interior'' Rowlee) - eastern and central North America, leaves usually lose hairs and become green by summer, only rarely remaining pubescent, seed capsules long It is considered a threatened species in the eastern United States in Connecticut, Maryland, and Massachusetts.〔USDA Plants Profile: (''Salix exigua'' )〕 ==Uses== This willow had many uses for Native Americans; the branches were used as flexible poles and building materials, the smaller twigs were used to make baskets, the bark was made into cord and string, and the bark and leaves had several medicinal uses.〔University of Michigan Native American Ethnobotany Index:(''Salix exigua'' )〕 The Zuni people take an infusion of the bark for coughs and sore throats.〔Camazine, Scott and Robert A. Bye 1980 A Study Of The Medical Ethnobotany Of The Zuni Indians of New Mexico. Journal of Ethnopharmacology 2:365-388 (p. 378)〕 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「Salix exigua」の詳細全文を読む スポンサード リンク
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