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''Micranthes nivalis'' is a species of saxifrage. It is commonly called snow saxifrage or (ambiguously) "alpine saxifrage". Found on irrigated rocks or open vegetation in shaded sites, often on mountain ledges and crags with base rich substratum. This species is not very tolerant of competition and so is found in damp crevasses where it survives in small pockets. ''M. nivalis'' is a perennial species which has been found to set seed in Scotland but not in Cumbria where the populations are small and threatened. This species is also found in Norway, Ireland Svalbard, northern Germany, Russia, Canada, Alaska and Greenland.〔(Flora of Svalbard )〕〔 The plant was first described by Carl Linnaeus in ''Flora Lapponica'' (1737), as a result of his Lapland voyage.〔(Linnaeus, Carl von. 1753. Species Plantarum 1: 401. )〕 Some populations from the Canadian Province of Quebec have been recognized as a distinct species by some authors,〔(Flora of North America v 8 p 65. )〕〔(Fernald, Merritt Lyndon. 1917. Rhodora 19(224): 141–142. )〕 a variety of ''M. nivalis'' others:〔(Small, John Kunkel. 1918. North American Flora 22(6): 552. )〕〔Boivin, Joseph Robert Bernard. 1966. Le Naturaliste Canadien 93(5): 646.〕 *''Saxifraga gaspensis'' Fernald * *''Saxifraga nivalis'' var. ''gaspensis'' (Fernald) B. Boivin * *''Micranthes gaspensis'' (Fernald) Small is distinguished from var. ''nivalis'' by smaller inflorescences and narrower leaves. It is known only from the Shickshock Mountains of the Gaspé Peninsula of southeastern Québec. It has been suggested that this may be a hybrid of ''M. nivalis'' and ''M. tenuis;'' further study is warranted.〔 ==References== 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「Micranthes nivalis」の詳細全文を読む スポンサード リンク
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