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''Pinus taeda'', commonly known as loblolly pine, is one of several pines native to the Southeastern United States, from central Texas east to Florida, and north to Delaware and southern New Jersey.〔(Flora of North America: ''Pinus taeda'' )〕 The wood industry classifies the species as a southern yellow pine.〔 U.S. Forest Service surveys found that loblolly pine is the second most common species of tree in the United States, after red maple. For its timber, the pine species is regarded as the most commercially important tree in Southeastern US.〔(【引用サイトリンク】url=http://www.ibiblio.org/pic/NCTrees/loblollypine.htm )〕〔(【引用サイトリンク】url=http://dendro.cnre.vt.edu/LandownerFactsheets/detail.cfm?Genus=Pinus&Species=taeda )〕〔(【引用サイトリンク】url=http://www.treeimprovement.org/public/about/species-interest/loblolly-pine/loblolly-pine )〕 The common name loblolly is given because the pine species is found mostly in lowlands and swampy areas. Loblolly pine is the first among over 100 species of ''Pinus'' to have its complete genome sequenced. As of March 2014 it is the organism having the largest sequenced genome size. Its genome with 20.15 billion base pairs is seven times larger than that of humans. == Description == Loblolly pine can reach a height of with a diameter of . Exceptional specimens may reach tall, the largest of the southern pines. Its needles are in bundles of three, sometimes twisted, and measure long; an intermediate length for southern pines, shorter than those of the longleaf pine or slash pine, but longer than those of the shortleaf pine and spruce pine. The needles usually last up to two years before they fall, which gives the species its evergreen character. Although some needles fall throughout the year due to severe weather, insect damage, and drought, most needles fall during the autumn and winter of their second year. The seed cones are green, ripening pale buff-brown, in length, broad when closed, opening to wide, each scale bearing a sharp 3–6 mm spine.〔〔Farjon, A. (2005). ''Pines. Drawings and descriptions of the genus Pinus'', ed.2. Brill, Leiden ISBN 90-04-13916-8.〕 The tallest loblolly pine currently known, which is tall, and the largest, which measures 42 cubic meters in volume, are in Congaree National Park.〔(Gymnosperm Database: ''Pinus taeda'' )〕 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「Pinus taeda」の詳細全文を読む スポンサード リンク
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