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Luzula nivalis
''Luzula nivalis'', commonly known as arctic wood-rush or less commonly as snowy wood-rush (both names are used with or without hyphenation), is a species of perennial rushes endemic to Canada, Greenland, Alaska, and Northern Europe in Scandinavia. It was described by Polunin (1940) as one of the most abundant, ubiquitous, and ecologically important of all arctic plants.〔
==Taxonomy and naming==
''Luzula nivalis'' is classified under the section ''Thyrsanochlamydeae'' of the subgenus ''Luzula''.〔 It belongs to the genus ''Luzula'' of the rush family Juncaceae. With regards to the etymology of the binomial: the generic name ''Luzula'' could come from the Italian ''lucciola'' ("to shine, sparkle") or the Latin ''luzulae'' or ''luxulae'', from ''lux'' ("light"), inspired by the way the plant's hairs sparkle when wet with dew. ''Nivalis'' is Latin for snowy, snow-covered or snow-like.
The exact taxonomy of ''Luzula nivalis'' is a little confusing due to confusions over the naming of the taxon; the name ''L. arctica'' has frequently〔 (though less occasionally in recent years) been applied this taxon, or it has been regarded as a separate species altogether.〔 Elven et al. (2003) stated that "a number of authors (Hultén 1968, Böcher et al. 1968, Porsild and Cody 1980, Novikov 1990) have considered L. nivalis to be conspecific with L. arctica, but some of them (Hultén 1968, Böcher et al. 1968) have used the name L. arctica, while the others (Porsild and Cody 1980...) (used ) the correct name L. nivalis.".〔 Elven et al. (2003) also noted that ''L. campestris'' var. ''nivalis'' was widely considered to be conspecific with ''L. arctica.''〔 The current botanical consensus seems to be that lectotypification solves the issue and that ''L. arctica'' and ''L. nivalis'' should be regarded as the same species, with the name ''L. nivalis'' being chosen as this (derived from ''L. campestris'' var. ''nivalis'') is the species's basionym and was used before ''L. arctica''.〔
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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