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Oxydendrum
Sourwood or sorrel tree, ''Oxydendrum arboreum'', 〔''Sunset Western Garden Book,'' 1995:606–607〕 is the sole species in the genus ''Oxydendrum'', in the family Ericaceae. It is native to eastern North America, from southern Pennsylvania south to northwest Florida and west to southern Illinois; it is most common in the lower chain of the Appalachian Mountains. The tree is frequently seen as a component of oak-heath forests.〔(''The Natural Communities of Virginia Classification of Ecological Community Groups'' (Version 2.3), Virginia Department of Conservation and Recreation, 2010 )〕〔Schafale, M. P. and A. S. Weakley. 1990. ''Classification of the natural communities of North Carolina: third approximation''. North Carolina Natural Heritage Program, North Carolina Division of Parks and Recreation.〕
==Growth==
Sourwood is a small tree or large shrub, growing to tall with a trunk up to diameter. Occasionally on extremely productive sites, this species can reach heights in excess of 30 meters and 60 cm diameter. The leaves are alternately arranged, deciduous, long and broad, with a finely serrated margin; they are dark green in summer, but turn vivid red in fall. The flowers are white, bell-shaped, 6–9 mm ( 1/4 to 1/3 inch) long, produced on long panicles. The fruit is a small woody capsule. The roots are shallow, and the tree grows best when there is little root competition; it also requires acidic soils for successful growth. The leaves can be chewed (but should not be swallowed) to help alleviate a dry-feeling mouth.
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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