Permalink : http://hdl.handle.net/2115/85003

JaLCDOI : 10.14943/lowtemsci.80.175

KEYWORDS : 外来植物;隔離分布;固有変種;絶滅危惧植物;日本海要素;distinct distribution;endemic variety;Japan sea elements;naturalized foreign plants;threatened plants

標本にもとづく尾瀬の自生維管束植物は，893種類（834種7亜種34変種18雑種）であった．このうち，31種類は環境省により絶滅危惧種に指定されており，群馬県，福島県，新潟県により指定されているものも含めると，絶滅危惧種は160種類に達する．尾瀬の植物相は日本海要素を多く含むことに特徴がある．一方で尾瀬には，隔離分布種する稀産種も多い．尾瀬固有の分類群（種・亜種・変種）はキンポウゲ科のオゼキンポウゲRanunculus subcorymbosus var. ozensisのみで，オゼヌマアザミなど数種は尾瀬とその周辺のみに分布が限られる準固有種である．尾瀬の帰化植物は25種類で，他に平地性植物の侵入も報告されている．
Based on a survey of herbarium specimens, 893 taxa (834 species, seven subspecies, 34 varieties, and 18 hybrids) of vascular plants were recorded from Oze. Of these, 31 and 160 taxa are designated as threatened by the Japanese Government and local governments, respectively. The flora of Oze includes many plants classified generically as "Sea of Japan Elements", which are distributed in heavy snowfall areas and include many rare plants with disjunct distributions. Ranunculus subcorymbosus var. ozensis is the only endemic plant distributed in Oze, and 25 naturalized exotic plants have also been reported from the region.