522 A. HESSELHO 



257. Brachythecium latifolium (Lindb.) Philib. 



Hypmiin latifolium Lindb. 



Gjj'i near Alptagerdi (St.)I, in company with Mninm piiiwlatiim. 



25cS. Scleropodium purum (L.) Lim pr. 

 Hypmim purum L. 



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

 Holt!; Drangshlid!; Skogafoss!. 



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

 wliere 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 clifTs with a southern exposure, or in clefts, and, as a rule, in asso- 

 ciation with Hijlocomium spp., Eurhynchinm piliferum, Mnium undulatum, 

 Thuidium delicatulum and T. tamariscinum. 



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

 Hijpnum strigosum Hoffm. 



Var. jyracox (Hedw.) Lindb. 



N. Iceland: Hof (O. D.)!; Vidimvri vGrl.)!. W Iceland: Kalmanstunga 

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



Grows everywhere rather scantil}' on dry soil-covered rocks or 

 on tuff. 



2(50. Eurhynchium diversifolium (Schleich.) Br. eur. 

 Hypnum strigosum var. diversifolium Lindb. 



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

 at an altilude of about 900 metres!. 



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

 tain, interspersed in tufts of Sphærocephalus turgidus, Dicranum congestum 

 and Hylocomium proliferum. Near Reykjahlid it grew intermixed in a 

 tuft of Timmia auslriaca. 



Eurhynchium præcox 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 planls determined as E. diversifolium are 

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

 considerably in numbcr, even on the same plant, usuallj' the}' are very 

 numerous; but specimens of E. strigosun^ \ ar. præcox from Central Europe 

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

 cells than has the tj'pe. 



