522 A. HESSELBO 



257. Brachythecium latifolium (Lindb.) Philib. 



Hypnnm latifolium Lindb. 

 Gja near Alptagerdi (St.)!, in company with Mnium pnnctatnm. 



258. Scleropodium purum (L.) Limpr. 

 Hypnnm purum L. 



SW. Iceland: Alafoss!. S. Iceland: Breidabolstadr!; Barkardstadr!; 

 Holt!; Drangshlid!; Skogafoss!. 



This species has been found only in the southern part of Iceland, 

 where it is frequent on Fljotshlid and below Eyjafjall. Near Alafoss 

 it grew on the slope stretching down towards the river in which the 

 temperature of the water was about 25. Usually it grows at the foot 

 of cliffs with a southern exposure, or in clefts, and, as a rule, in asso- 

 ciation with Hylocomium spp., Eurhynchium pilifemm, Mnium undulatnm, 

 Thuidinm delicatulum and- T. tamariscinnm. 



-*f - 



259. Eurhynchium strigosum (Hoffm.) Br. eur. 

 Hypn n m s trigosn m Ho ff m . 



Var. prwcox (Hedw.) Lindb. 



N.Iceland: Hof (O. D.)!; Vidimyri (Grl.)!. W Iceland: Kalmanstunga 

 Grl.)!; Gilsbakki!; Reykjavik!. S. Iceland: Barkarstadr!. 



Grows everywhere rather scantily on dry soil-covered rocks or 

 on tuff. 



260. Eurhynchium diversifolium (Schleich.) Br. eur. 

 Hypnnm strigosum var. diversifolium Lindb. 



N. Iceland: Reykjahlid!; Hofsfjall near Eyjafjordur (O. D.)!; Akureyri, 

 at an altitude of about 900 metres!. 



Near Akureyri it grew in gravelly soil at the summit of the moun- 

 tain, interspersed in tufts of Sphcerocephalus tiiryidus, Dicrannm congestnm 

 and Hylocomium proliferum. Near Reykjahlid it grew intermixed in a 

 tuft of Timmia anstriaca. 



Eurhynchium prcecox and E. diversifolium are so closely allied that, 

 according to my opinion, it is doubtful whether the last species can be 

 regarded as anything more than a decidedly Alpine form of Eurhynchium 

 strigosum. The leaves in the plants determined as E. diversifolium are 

 longly decurrent. The cells of the basal angles of the leaves vary 

 considerably in number, even on the same plant, usually they are very 

 numerous; but specimens of E. strigosum var. prcecox from Central Europe 

 also vary considerably in this respect, and often have many more alar 

 cells than has the type. 



