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Solidago ouachitensis : ウィキペディア英語版 | Solidago ouachitensis
''Solidago ouachitensis'' is a North American species of flowering plants in the aster family known by the common name Ouachita Mountain goldenrod. It has a very limited range, found only in the Ouachita Mountains along the border between Arkansas and Oklahoma in the United States.〔(''Solidago ouachitensis''. ) The Nature Conservancy.〕〔(''Solidago ouachitensis''. ) Center for Plant Conservation.〕〔(Biota of North America Program 2014 county distribution map )〕〔(Taylor, Constance Elaine Southern, & Taylor, Ronald J. 1986. Sida 11(3): 334–339 ) includes photo of type specimen plus distribution map〕 ''Solidago ouachitensis'' is a perennial herb growing up to about 1.1 meters (44 inches) in height. It produces one or more erect stems from a woody caudex. The serrated (toothed) leaves are 10 to 13 centimeters (4.0-5.2 inches) long around the middle of the plant and smaller higher on the stem. One plant will produce 25-50 bell-shaped flower heads. Each flower head usually contains one yellow ray floret and 4-5 disc florets.〔(Flora of North America, ''Solidago ouachitensis'', C. E. S. Taylor & R. J. Taylor, 1986. Ouachita Mountains goldenrod )〕 Flowering occurs in September and October.〔 ''Solidago ouachitensis'' is likely a relict of times when conditions were colder and wetter. It only occurs in the cooler, moister sites in the Ouachita Mountains,〔 usually in wet forest habitat on north-facing slopes.〔 Associated species include ''Magnolia tripetala'', ''Fagus grandifolia'', ''Acer rubrum'', ''Quercus rubra'', ''Aesculus glabra'', ''Asarum canadense'', ''Campanula americana'', ''Panax quinquefolium'', ''Toxicodendron radicans'', and ''Hybanthus concolor''.〔 ==References==
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