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Cunninghamia
The genus ''Cunninghamia'' is a genus of one or two species of evergreen coniferous trees in the cypress family Cupressaceae. They are native to China, Taiwan, northern Vietnam and Laos, where they may reach 50 m in height. In vernacular use, it is most often known as ''Cunninghamia'', but is also sometimes called "China-fir" (though it is not a fir). The genus name ''Cunninghamia'' honours Dr. James Cunningham, a British doctor who introduced this species into cultivation in 1702 and botanist Allan Cunningham.〔Brown, Robert. The Miscellaneous Botanical Works of Robert Brown (1866) vol. 1: 461 ()〕
==Taxonomy==
The genus is traditionally said to contain two similar species, ''Cunninghamia lanceolata'' and ''C. konishii'', often referred to as the China fir and Taiwan fir, respectively. ''C. lanceolata'' occurs in mainland China, Vietnam, and Laos, whereas ''C. konishii'' is restricted to Taiwan. However, molecular genetic evidence is suggesting that they are the same species, and that ''C. konishii'' of Taiwan derive from multiple colonizations from the mainland. As ''C. lanceolata'' was the first name published, this name takes priority if the two are combined. In that case, Taiwan fir becomes ''Cunninghamia lanceolata'' var. ''konishii''. However, there is no consensus yet as to whether the two species should be combined.〔
In the past, the genus was usually treated in the family Taxodiaceae,〔 but this family is now included within the Cupressaceae.〔 A few botanists have also treated it in a family of its own, Cunninghamiaceae, but this is not widely followed. In the fossil record, ''Cunninghamia'' is also known from America.〔for example Orr, Elizabeth L. and William N. Orr 2009 Oregon Fossils: Second Edition, Oregon State University Press; ISBN 0-87071-573-9 ISBN 978-0870715730 〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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