302 EYTHOR EINARSSON 



taxa with insufficiently known areas of distribution, comprises 12 species, 

 or 2.7 per cent of the Icelandic vascular plants. Finally, as mentioned above, 

 the 10 western species make up 2.3 per cent of the flora. 



As seen by this classification, more than half of the Icelandic vascular 

 plants are species with a Boreal distribution, whereas Arctic-Alpine species 

 comprise only ca. 33 per cent of the flora. Most of the Arctic ones have a 

 Low-Arctic distribution, but High Arctic species are practically absent from 

 Iceland. Those with an Eastern distribution are more than nine times as 

 numerous as the Western species in Iceland. Many of the Icelandic vascular 

 plants have an Oceanic or Sub-oceanic distribution, whereas typical Continen- 

 tal species are practically absent from Iceland. 



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