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''Solidago nemoralis'' is a species of flowering plant in the aster family, Asteraceae. It is native to North America, where it is widely Canada (every province except Newfoundland/Labrador) and the United States (all states wholly or partially east of the Rocky Mountains).〔(Biota of North America Program 2014 county distribution map )〕 Its common names include gray goldenrod, gray-stem goldenrod, old-field goldenrod,〔(''Solidago nemoralis''. ) Germplasm Resources Information Network (GRIN).〕 field goldenrod,〔(''Solidago nemoralis''. ) NatureServe. 2012.〕 prairie goldenrod, dwarf goldenrod,〔Belt, S. 2009. (Plant Fact Sheet for gray goldenrod (''Solidago nemoralis''). ) USDA NRCS, Norman A. Berg National Plant Materials Center, Beltsville, MD. 2009.〕 and dyersweed goldenrod.〔(''Solidago nemoralis''. ) Native American Ethnobotany. University of Michigan, Dearborn.〕 ==Description== Like other goldenrods, this species is a perennial herb. One of the smaller goldenrods,〔 It grows 20 centimeters to one meter (8-40 inches) tall from a branching underground caudex. There are 1 to 6 erect stems, sometimes more.〔(''Solidago nemoralis''. ) Flora of North America.〕 The stems are reddish to gray-green and have lines of short, white hairs.〔 The lower leaves are up to 10 centimeters (4 inches long and the blades are borne on winged petioles. Leaves on the upper half of the stem are narrower and shorter and lack petioles. The spreading inflorescence can carry up to 300 flower heads. The head contains 5 to 11 yellow ray florets each a few millimeters long surrounding up to 10 yellow disc florets. Flowering occurs in late summer and fall.〔 The fruit is a rough-texured cypsela about 2 millimeters long tipped with a pappus of bristles slightly longer.〔 There are two subspecies:〔 *''Solidago nemoralis'' ssp. ''decemflora'' – tetraploid taxon with larger flower heads and narrower basal leaves in west-central North America *''Solidago nemoralis'' ssp. ''nemoralis'' – diploid or tetraploid taxon in the eastern regions of the species' range 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「Solidago nemoralis」の詳細全文を読む スポンサード リンク
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