634 



A. HESSELBO 



*Dicrano\veisia crispuhi. 

 Aongstræniia longipes. 

 Dicranum falcatum. 



* — Starckei. 

 — molle. 



Desmatodon latifolius. 

 *Schistidium rivulare. 

 Grimniia Doniana. 



* — funalis. 

 Tetraplodon bryoides. 



*Polilia commutata. 

 Brvum arcticum. 



*Mnium orthorrhynchum. 

 Conostoniiim boreale. 

 Philonotis seriata. 

 Psilopiluni lævigatum. 

 — hercynicum. 



*Poh'trichuni alpinum. 



— sexangulare. 



Amblystegium Spriicei. 

 *Hypnuni revolutuni. 

 — alpestre. 



* — ochraceum. 



* — sarmentosum. 



The species to >vhich an asterisk has heen prefixed have every- 

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

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

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

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

 one species which is very common everywhere. 



