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''Dipteronia'' is a genus of two living and one extinct〔McClain, Amy, M & Manchester, Steven R. (2001). Dipteronia (Sapindaceae) from the Tertiary of North America and implications for the phytogeographic history of the Aceroideae. American Journal of Botany 88(7):1316-1325〕 species, regarded in the soapberry family Sapindaceae ''sensu lato'' after Angiosperm Phylogeny Group (APG I 1998, APG II 2003) and more recently (Harrington ''et al.'' 2005) 〔Harrington, M. G., K. J. Edwards, S. A. Johnson, M. W. Chase, and P. A. Gadek. 2005. Phylogenetic inference in Sapindaceae sensu lato using plastid matK and rbcL DNA sequences. ''Systematic Botany'' 30: 366-382 (abstract (here )).〕)or traditionally by several authors in Aceraceae, related to the maples. They are deciduous flowering shrubs or small trees, reaching 10-15 m tall. The leaf arrangement is opposite and pinnate. The inflorescences are paniculate, terminal or axillary. The flowers have five sepals and petals; staminate flowers have eight stamens, and bisexual flowers have a two-celled ovary. The fruit is a rounded samara containing two compressed nutlets, flat, encircled by a broad wing which turns from light green to red with ripening. There are only two living species, ''Dipteronia sinensis'' and ''Dipteronia dyeriana''; both are endemic to mainland China. ''Dipteronia dyeriana'' is listed by the (IUCN ) as being a "Red List" threatened species. ''Dipteronia browni'' is an extinct species from the early Eocene Klondike Mountain Formation of Washington, and is also known from early Eocene sites in British Columbia Canada such as Driftwood Canyon Provincial Park and the McAbee Fossil Beds. The name ''Dipteronia'' stems from the Greek "di-" (two, both) & "pteron" (wings), from the winged fruits with wings on both sides of the seed. ==Notes== 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「Dipteronia」の詳細全文を読む スポンサード リンク
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