THE BHYOPHYTA OF ICELAND 



481 



dalur (C. Hansen)!. NW. Iceland : Lundur!, fr. S. Iceland: Vestmannaey! ; 

 fr. ; Skalholt!; Austerhlid near Geysir!; Breidabolstadr ! ; Barkarstadr!; 

 Holt!, fr.; Drangshlid!. 



Common in the southern part of the country and on Vestmannaey; 

 rarer in the other parts of the country. In S. Iceland it grew especially 



l-ig. 6. Bryum Grcenlundii. , Capsules (X20); /, leaves (X20); c, perichc-etial leaves (X20); (/, leaf 



margin at base, and e, from the middle of Ihe leaf ()\ 120). 



abundantly everywhere in clefts of tuff rocks, and on Vestmannaey it 



/ J . 



was also frequent on the faces of damp tuff rocks. It was found in 

 several localities in fruit, which was quite green even in the beginning 

 of July. Near Lundur it was found on damp ground, associated with 

 other Bryum spp. and Dichodontinm, and had ripe fruit at the end of 

 July. In several of the fruiting specimens from this locality a few 

 hermaphrodite flowers were found besides the numerous $ flowers. $ 

 plants occur everywhere, but J 1 plants have not been found. 



In the leaf-angles of all the plants investigated hair-formations were 

 found, consisting of readily falling, 810 celled, brown, papillose hairs, 

 which very easily break into pieces of 24 cells. The leaves vary from 

 shortly pointed, with nerve vanishing just below the apex, and shortly 



