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''Solidago puberula,'' the downy goldenrod, is a plant species native to eastern North America from Nova Scotia and Ontario south to Florida and Louisiana. Two subspecies are commonly recognized:〔(The Plant List )〕〔(Semple, John Cameron. 2003. New names and combinations in goldenrods, ''Solidago'' (Asteraceae: Astereae). Sida 20(4): 1605-1616. )〕 *''Solidago puberula'' subsp. ''puberula'' *''Solidago'' ''puberula'' subsp. ''pulverulenta'' Subsp. ''pulverulenta'' has smaller but more numerous leaves, generally 50-110 leaves long halfway up the stem, as opposed to 10-60 leaves long for subsp. ''puberula''. ''Solidago puberula'' is a perennial herb up to tall, with a branched woody rootstock. It can have 1-5 puberulent (hairy) stems. Leaves are toothed, tapering at the tip, puberulent on both sides. Flowering heads number 15-250, in an elongate, paniculiform array. Ray flowers are yellow, 9-16 per head. Disc flowers number 6-15 per head, each up to 3 mm long.〔(Nuttall, Thomas. 1818. Genera of North American Plants 2: 162. )〕〔Gleason, H. A. & A.J. Cronquist. 1991. Manual of the Vascular Plants of Northeastern United States and Adjacent Canada (ed. 2) i–910. New York Botanical Garden, Bronx.〕〔Cronquist, A.J. 1980. Asteraceae. 1: i–xv, 1–261. In Vascular Flora of the Southeastern United States. The University of North Carolina Press, Chapel Hill.〕〔Scoggan, H. J. 1979. Dicotyledoneae (Loasaceae to Compositae). Part 4. 1117–1711 pp. In Flora of Canada. National Museums of Canada, Ottawa.〕 ==References== 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 puberula」の詳細全文を読む スポンサード リンク
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