(334 



A. HESSELI3O 



*Dicranoweisia crispula. 

 Aongstrcemia longipes. 

 Dicranum ialcatum. 

 Starckei. 

 molle. 



Desmatodon latifolius. 

 *Schistidium rivulare. 

 Grimmia Doniana. 



funalis. 



Tetraplodon bryoides. 

 *Pohlia commutata. 

 Brvum a re ti cum. 



*Mnium orthorrhynchum. 

 Conostomum boreale. 

 Philonotis seriata. 

 Psilopilum laevigatum. 



hercynicum. 

 *Polytrichum alpinum. 



sexangulare. 

 Amblystegium Sprucei. 

 *Hypnum revolutum. 

 alpestre. 

 ochraceum. 

 sarmentosum. 



The species to which an asterisk has been prefixed have every- 

 where, or throughout the larger part of Iceland, the degree of fre- 

 quency expressed by figure 4 (see p. 644), and consequently they 

 constitute the bulk of the vegetation. Groups 1 and 3 include con- 

 jointly 75 (41 -f- 34) species, while group 4 has 15, and group 2 only 

 one species which is very common everywhere. 



