414 A. HESSELBO 



boggy ground it is found interwoven with Hypnaceæ in their tufts, but 

 rarely in those of Cinclidium, Lophozia Kunzeana or other bog-mosses. 

 The majoritj' of the specimens investigated are small and delicate, 

 and must parth" be referred to formå heterophylla Bryhn et Kaalaas, and 

 partly to forms transitional between this and the type. Only sterile 

 piants have been found. 



41. Lophozia Kunzeana (Hiib.) Evans. 



Verj' common in bogs, on damp rocks, damp gravellj' ground, etc. 



It is most \videl3' distributed in bogs where it grows woven into, 

 or creeping over tufts of other Bryophyta, especially Sphagnum. Near 

 Akure3'ri, for instance, it commonly occurs in bogs up to a height of 

 about 600 metres. In S. Iceland it is rather rare in the bogs of the 

 Iowlands, but is met with abundantly at an attitude of 200—400 metres. 



42. Lophozia barbata (Schmid.) Dum. 



E. Iceland: Årbær, among Grimmia canescens (H. J.'!. W. Iceland: 

 Bjarnarhofn (H. J.)!; Berserkjahraun (H. J.)!; Reynivellir (Grl.)!; Nordre- 

 dalur in the district of Borgarfjordur!; Alafoss!. 



In addition to the above-mentioned localities G ro ni und and Hel gi 

 Jonsson record this species from several other localities, but some of 

 the specimens which have been investigated proved to be wronglj' deter- 

 mined (being, as a rule, forms of L. lycopodioides), so only those loca- 

 lities are enumerated here from which authentic specimens are known. 



L. barbata appears to be rather rare. It has as a rule been col- 

 lected, intermixed rather sparingh' in tufts of other Bryophyta especiallj' 

 Grimmia and Hylocomium spp. and belongs to the Gr/mmm-heaths or 

 to the mossy bottoms of birch coppices; thus in Nordredal it frequently 

 occurred in birch coppices among Hylocomium spp., Dicranum scoparium, 

 Plilidium ciliare, etc. 



Note. Lophozia gracilis (Schl.) Stephani is rccorded from several 

 localities, but all the specimens which have been investigated have been 

 wrongW determined, being mostly Lophozia lycopodioides var. parvifolia. 



43. Lophozia ventricosa (Dicks.) Dum. 



Common on more or less damp ground, both boggy and gravelly 

 ground, and on rocks on mountain heights. 



This species is verj^ common especialh' in NW. Iceland, and occurs 

 there on a heathy bottom woven into tufts of Dicranum ; along the 

 banks of streams associated with Harpanthus, Lophozia quinquedentata 

 and Cephalozia bicnspidata; and in bogs among Spagnum. It appears, 

 on the whole. to be more frequent the higher it ascends; undoubtedl}' 

 its main distribution is from a height of about 300—400 metres upwards. 



Var. porphyroleuca (Nees) Hartm. is likewise commonly distributed 

 and occurs, for instance, frequently interwoven with Conostomum in its 

 compact tufts, and also in tufts oi Dicranum and Sphagnum on damp ground. 



