432 A. HESSELBO 



(St.)!. Hvaneyrardalur (St.)!. NW. Iceland: common near Isafjordur!; 

 Dyrafjordur!; Dynjandi!. W. Iceland: Budir (H. J. )!; Nordredalur in Bor- 

 garfjordur!. S. Iceland: Almannagja!; Laugarvatn!; Ingjaldsholl (H. J.)!; 

 Heidi in Myrdalur (H. J.)!; Seljaland!. 



Commonly distributed both on knolls in bogs and on drier ground. 

 Thus, in lava-clefts near Thingvellir, it is frequently met with on humus- 

 covered blocks associated with Rhacomitriam hypnoides and Hylocomium 

 spp. It is of most frequent occurrence in the lower country, but near 

 Eyjafjordur it ascends to about 600 metres and near Isafjordur to about 

 400 metres above sea-level. Fruit was found in several places. It 

 occurs especially in orthocladous forms. 



12. Sphagnum Russowii Warnst. 

 S. Iceland : Thingvellir!. 



13. Sphagnum Warnstorfii Russow. 



Common on knolls in bogs and on damp ground on slopes up to 

 a height of about 500 metres. 



Reddish forms are of most frequent occurrence, violet, green and 

 yellowish-green forms are far more rarely met with. Only sterile spe- 

 cimens have been found. 



14. Sphagnum rubellum Wils. 



Common on knolls in bogs and on \vet slopes especially in the 

 lowlands, but it also frequently ascends to about 500 metres above sea- 

 level. Red and violet forms are frequent, green ones are rarer. Only 

 sterile specimens have been found. 



15. Sphagnum acutifolium Ehrh. 



"In Islandia leg. Morch"!. N. Iceland: Hof (O. D.)!. NW. Iceland: 

 Isafjordur!; Armuli!. W.Iceland: Reykholtdalur on warm ground (Grl.;!); 

 Reykjavik!; between Thingvellir and Geysir (Grl.!). 



Occurs here and there on boggy ground in the lowlands and as 

 a rule rather sparingly. Near Isafjordur it was found in a bog at an 

 altitude of 250 metres. Only sterile specimens have been found. 



16. Sphagnum subnitens Russ. et Warnst. 



NW. Iceland: Bseir!; Thorvaldsdalur (St.)!. W. Iceland: Grund!; 

 Snseldubeinstadahver in Reykholtdalur!; Reykjavik (H. J.;!). S. Iceland: 

 Laugarashver!; Borg (H. J.)!; Krisuvik (Stp.)!. 



Found here and there in NW., W. and S. Iceland where it occurs 

 both in bogs and along the margin of hot springs. It is frequent around 

 Reykjavik where it was also gathered in fruit. It is as a rule pale 

 yellowish-green in colour. Near Laugarashver a f. violasccns was found 

 growing in large cushions on warm ground. 



