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The tree species ''Pinus koraiensis'' is commonly called Korean pine. It is native to eastern Asia: Korea, Manchuria, Mongolia, the Temperate rainforests of the Russian Far East, and central Japan. In the north of its range, it grows at moderate altitudes, typically to , whereas further south, it is a mountain tree, growing at to altitude in Japan. It is a large tree, reaching a mature size of to height, and to trunk diameter. It is a member of the white pine group, ''Pinus'' subgenus ''Strobus'', and like all members of that group, the leaves ('needles') are in fascicles (bundles) of five, with a deciduous sheath. They are to long. Korean pine cones are to long, green or purple before maturity, ripening brown about 18 months after pollination. The to long seeds have only a vestigial wing and are dispersed by spotted nutcrackers. Korean pine differs from the closely related Siberian pine in having larger cones with reflexed scale tips, and longer needles. The seeds are extensively harvested and sold as pine nuts, particularly in northeastern China; it is the most widely traded pine nut in international commerce. The nut oil contains 11.5% of the unusual fatty acid pinolenic acid (''cis''–5–''cis''–9–''cis''–12 octadecatrienoic acid).〔Imbs, Nevshupova, and Pham: "Triacylglycerol Composition of ''Pinus koraiensis'' Seed Oil" ''JAOCS'' 75(7)865—870. 1998, AOCS Press.〕 Korean pine is a popular ornamental tree in parks and large gardens where the climate is cold, such as eastern Canada and the far northern United States, giving steady though not fast growth on a wide range of sites. It is tolerant of severe winter cold, hardy down to at about . == See also == * Boreal forest * Jatjuk, Korean pine nut porridge 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 koraiensis」の詳細全文を読む スポンサード リンク
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