THE BRYOPHYTA OF ICELAND 411 



moss bogs associated with species such as Philonotis seriala, Chiloscyphus 

 polyanthos v. frag His and Scapania nndiilata. 



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

 about 300 metres, but is also frequently met with up to about 500 

 metres, for instance in Esja. 



30. Haplozia riparia (Tayl.) Dum. 



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

 Holt!. 



In all the above-mentioned localities the plant was growing on tuff' 

 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 

 Hymenostylium curvirostre, Hypniim filicimim and Anomobryum /Hi forme. 

 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, partly in company with Fegatella coniea, Preissia commu- 

 tata, Bryum oeiuim, etc. 



Haplozia riparia is recorded by Gronlund 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 

 intermixed in the tufts of other Bryophyta. Male plants and fruiting 

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

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

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

 up to about 500 metres. Var. sphcerocarpoidea (De Not.) Mass, has a distri- 

 bution similar to that of the type, 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 plants, is more 

 or less distinctly rough with strife, and rarely smooth. 



32. Haplozia pumila (With.) Dum. 



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

 intermixed in a tuft of Eucalyx siibellipticus. 



The rest of the specimens referred by Gronlund and Jensen to 

 this species all belong to Haplozia atrovirens. 



33. Jamesoniella autumnalis (De Cand.) Steph. 

 S. Iceland: Nuphlidarhals (Stp.)!. 



34. Sphenolobus minutus (Crantz) Steph. 



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

 osmiuidoides. NW. Iceland: Hesteyri, in a tuft of Dicramim elongatam. 

 W.Iceland: Grund in Skorradalur. among Polytrichnm strictum. 



27* 



