416 A. HESSELBO 



47. Lophozia Schultzii (Nees) Schiffner. 



E. Iceland: SeydisfjOrdur; Vestdalur (at an altitude of about 200 

 metres)!. N. Iceland: Akureyri!. W. Iceland: Stykkisholmur!. 



It was collected everywhere only in small quantities together with 

 bog -mosses such as Hypmim revolvens, H. stellatum, Mnium Seligeri, 

 etc.; it was as a rule sterile. Near Stykkisholm it was collected in 

 unmixed tufts with antheridia and young calyces. 



48. Lophozia Mulleri (Nees) Dum. 



Common, but occurred almost always in small quantities inter- 

 mixed in tufts of mosses. 



This species is most frequent in the lowlands up to about 300-400 

 metres above sea-level, but it also occurs at great altitudes in the Alpine 

 region, for instance, at about 600 metres on Berufjordurskard. It is 

 almost always sterile. 



Lophozia Miilleri occurs on very different substrata, most frequently 

 on rocks, but it may also be found on damp ground along streams, or 

 even in bogs. It varies exceedingly in size according to the degree of 

 dampness of the habitat. Xerophilous forms from rocks are usually 

 small and delicate, while bog forms which grow in the tufts of Hypnacece 

 are considerably larger and often approach so closely to L. Hornschu- 

 chiana that they are difficult to distinguish from the latter. On the 

 damp, vertical sides of the clefts of the tuff rocks of S. Iceland, for 

 instance on Fljotshlid, a vigorous, blackish-green form is frequently 

 met with forming large, pure mats. 



49. Lophozia Hornschuchiana (Nees) Macoun. 

 Jangermannia bantryensis, Hooker. 



E. Iceland: Seydisfjordur, frequent up to about 400 metres!. N.Ice- 

 land: Akureyri!; Hof; Eyjafjordur (O. D.)! c. coles. NW. Iceland: Isa- 

 fjordur. W. Iceland: Dalsnrynne in Nordredal!; Mulakot!; Botnsdalur!; 

 Reykjavik!; Kollafjordur. 



Occurs rather frequently, but as a rule scantily, on boggy ground 

 among mosses (Hypnum, Sphagnum, etc.), more rarely on stones in rivers. 

 In Nordredal, for instance, it was found abundantly in a small river 

 on submerged stones. 



50. Lophozia heterocolpos (Thed.) Howe. 



N. Iceland: Sponsgerde near Eyjafjordur (0. D.)!. NW. Iceland: Baeir!; 

 Kaldalon!. SW. Iceland: Hafnarfjordur!; Esja!, at an altitude of about 

 400 metres; Thingvellir (Grl.;!). 



In all the above localities it was found on humus-covered rocks, 

 especially in clefts. Near Kaldalon it grew on damp rocks woven into 

 a tuft of Meesea trichoides and Dicranella siibulata; on Esja it grew upon 

 damp tuff- rocks. In Thingvallahraun it is widely distributed in clefts 



