THE BRYOPHYTA OF ICELAND 411 



moss bogs associated with species siich as Philonotis seriata, Chiloscyphus 

 polyanthos v. fragilis and Scapanid undnlata. 



It is most widely distributed in the lowlands up to a height of 

 about 300 metres, but is also frequentl\^ met with up to about 500 

 metres, for instance in Esja. 



30. Haplozia riparia (Tayl.) Dum. 



Vestmannaey. S. Iceland: Flokastadagil!; Klitnafoss!; Barltarstadrl; 

 Holt!. 



In all the above-mentioned localities the plant was growing on tuflF 

 and was, as a rule, fruiting. On Vestmannaey it was growing on "Stora 

 Klit," on the surface of dripping tuff-rocks facing north, associated with 

 HijmenostyliLim ciirvirostre, Hijpmim filicimim and Anomobryum filiforme. 

 In S. Iceland it is fairly common in damp ravines on Fljotshlid and 

 below Eyafjall, and grows there partly associated with the above-men- 

 tioned species, parth' in company with Fegatella conica, Preissia commu- 

 tata, Bryiini oeniim, etc. 



Haplozia riparia is recorded by Gro n lund from Brynjudalur and 

 Seydisfjordur, but the specimens from these localities must be referred 

 to Haplozia atrovirens. 



31. Haplozia atrovirens (Schl.) Dum. 



Common on damp rocks, more rare on damp gravelly ground. 



It occurs sometimes in low, blackish-green cushions, sometimes 

 interniixed in the tufts of other Bryophyta. Male piants and fruiting 

 piants are frequently met with, sometimes in separate tufts, sometimes 

 mixed in the same tuft. Like Haplozia cordifolia it occurs most com- 

 monly to a height of about 300 metres, but is also frequently met with 

 up to about 500 metres. Var. sphærocarpoidea (De Not.; Mass. has a distri- 

 bution similar to that of the t3'pe, and occurs in the same localities as 

 the latter. Both forms pass evenly into each other. 



The cuticle of the leaves, in the majority of the piants, is more 

 or less distinctly rough with striæ, and rarely smooth. 



32. Haplozia pumila (With.) Dum. 



N. Iceland: Hof, near Eyjafjordur (O. D.)!. It was growing there 

 interniixed in a tuft of Eiicalyx subellipticus. 



The rest of the specimens referred b\' GrOnlund and Jensen to 

 this species all belong to Haplozia atrovirens. 



33. Jamesoniella autumnalis (De Cand.) Steph. 



S. Iceland: Nuphlidarhåls (Stp.)!. 



34. Sphenolobus minutus (Crantz) Steph. 



SE. Iceland: Lon, scantily among Sphagnum nibelliim and Fissidens 

 osmiindoides. NW. Iceland: Hesteyri, in a tuft of Dicraniim elongatum. 

 W. Iceland: Grund in Skorradalur, among Polytrichum strictiim. 



11* 



