518 



A. HKSSELBO 



24(5. Brachythecium salebrosum (Hoffm.) Br. eur. 



Hypnum pliimosnm Huds. 



Commonly distributed in all parts of the country. 



This species grows, as a rule, on rather dry ground, for instance 

 on grass-covered slopes and on stones; occasionally also on damp ground, 

 but everj^where scantily only and usually mixed with other mosses. It 

 is most frequent in the low land; near Akureyri it has, however, been 

 found at an elevation of about 500 metres, and near Seydisfjordur about 

 400 metres above sea-level. Fruit has been found only near Reykir 

 in S. Iceland. 



247. Brachythecium collinum (Schleich.) Br. eur. 



W. Iceland : Esja, Modruvellir!, on damp rocks at an altitude of 

 about 100 metres. 



The form collected here differs in its somewhat more longly pointed 

 stem-leaves and narrower, more slightty toothed, branch-leaves. 



Note. Brachythecium phirnosum (Sw.) Br. eur. is recorded by Gron- 

 lund from several localities, but all the specimens of it in the col- 

 lections have been wrongly determined and the majority of them belong 

 to Hypmim palustre. 



Fig. 14. Brachythecium lonyipilum. Habit (X 3). 



248. Brachythecium longipilum n. sp. 



Monoicum. Flores masculini in cauli primario numerosa, antheri- 

 diis c. 10 sordide flavis et paraphysibus paucis. Caespites humiles, densi 



