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''Magnolia officinalis'' (commonly called houpu magnolia or magnolia-bark) is a species of ''Magnolia'' native to the mountains and valleys of China at altitudes of 300–1500 m. == Identification == It is a deciduous tree growing to 20 m in height. The bark is thick and brown, but does not fissure. The leaves are broad, ovate, 20–40 cm long, and 11–20 cm broad. The flowers are fragrant and 10–15 cm wide, with 9-12 (rarely to 17) white tepals, and appear from May to June. The two varieties are: *''Magnolia officinalis'' var. ''officinalis'' has leaves with an acute apex. *''Magnolia officinalis'' var. ''biloba'' has leaves with a notch at the apex. This variety does not appear in the wild, and is only known in cultivation. It is possibly not a true variety at all, but actually a cultigen instead, though this has yet to be determined. ''M. officinalis'' differs very little from ''Magnolia obovata''; the only difference consistently observed between the two is hat the fruit aggregate of ''M. officinalis'' has a rounded base, while that of ''M. obovata'' has an acute base. Further research may or may not eventually determine if ''M. officinalis'' should be treated as a subspecies of ''M. obovata''. 〔Hunt, D. (ed). (1998). ''Magnolias and their allies''. International Dendrology Society and Magnolia Society. ISBN 0-9517234-8-0〕 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「Magnolia officinalis」の詳細全文を読む スポンサード リンク
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