THE BRYOPHYTA OF ICELAND 631 



C. Found only in a single localily, or in a few localities, in 

 the different paris of Iceland. 



Haplozia crenulata. Bryum bimum. 



Lophozia barbata. Mnium cuspidatum. 

 Lophocolea minor. — stellare. 



Diplophyllum obtusifolium. Cylindrotheciura concinnura. 



Sphagnum angustifolium. Eurhynchium strigosum. 



Dicranum Bonjeani. Amblystegium serpens. 

 Trematodon ambiguus. — Juratzkanum. 



Fissidens bryoides. — trichopodium. 



Leplodontium tlexifolium. Hypnum Sommerfeltii. 

 Barbula fallax. — Sendtneri. 



d. Frequent everywhere, or in large parts of Iceland. 



Radiila complanata. Common in South, Kast and West Iceland, 

 absent from North Iceland. 



Rhacomitriiim aciculare. Very common all over Iceland. 



Mnium hormim. Common, especially in South Iceland, rarer 

 in North Iceland. 



Pogonatum naniim. Common in several parts of West and 

 South-west Iceland. 



Metzgeria fiircata. Common over the whole of Iceland. 



The majority of the meridional species (a = 37 species and b — 

 10 species) have a decidedly southerly distribution. Of the species 

 belonging to group c only Lophozia barbata, Diplophyllum obtusi- 

 folium and Bryum bimum have been found, each in a separate 

 locality in East Iceland. The other habitats are equally distributed 

 over South, West and North Iceland. 



Table I shows that there is an almost equal number of Boreal 

 and Alpine species and a somewhat larger number of Ubiquists, 

 but in order to obtain a really comprehensive view of these groups, 

 showing which has the greatest importance with regard to the com- 

 position of the vegetation, it is also necessary to investigate how 

 many species with a somewhat high degree of frequency are con- 

 tained in each group. 



If all the species are included, the frequency of which — 

 throughout a larger part of Iceland (besides South Iceland) — is 

 expressed by the figure 3 (see p. 644) or upwards, the number of 

 species contained in each group will be as follows: — 



