530 A. HESSELBO 



282. Hypnum Sommerfeltii Myrin. 



N.Iceland: Stora Brekka near Eyjafjordur (O. D.)!. S.Iceland: Fell 

 (Harder, 1908)!, a few stems " among Hypnum iincinatum, H. stellatum 

 and Diirichum fle.vicaule. 



283. Hypnum chrysophyllum Brid. 

 Amblystegium chrysophyllum (Brid.) Lindb. 



E. Iceland: Berufjordur!. N. Iceland: Near Myvatn v Grl.)!; Hof near 

 Eyjafjordur (O. D.)!. W. Iceland: Esja, several places (Grl.;!). S. Iceland: 

 Geysir, on warm ground!. Vestmannaey, Heljusdalur!. 



Var. $ tettellum Schimp. 



W. Iceland: Esja!. 



On damp gravelly ground and on rocks, rather rare and scanty. 

 Near Geysir it grew plentifully on warm damp ground ove% which the 

 tepid water from the basin was flowing. Only sterile specimens have 

 been found. 



Hypnum Zemlice C.Jensen, which was collected by Steenstrup 

 (but no habitat is given) is only a form of Hypnum chrysophyllum. 



284. Hypnum protensum Brid. 



Amblystegium protensum Lindb. 



E. Iceland: Skrciddalur!; Seydisfjordur!. N. Iceland: Hof (O. D.)!: 

 frequent in Esja!. 



This species is probably widely distributed, but, on account of its 

 great resemblance to the far more commonly occurring H. stellatum, 

 cannot always be kept distinct from the latter species. It grows in 

 somewhat damp localities, both on stones and on the ground, but only 

 sterile specimens have been found. 



285. Hypnum stellatum Schreb. 

 Amblystegium stellatum (Schreb.) Lindb. 



Very common everywhere on a damp substratum, on rocks, on the 

 ground and in bogs, and not rarely in fruit. It is abundant even at a 

 height of 500600 metres above sea-level. 



286. Hypnum polygamum (Br. eur.) Wils. 

 Amblystegium polygamum Br. eur. 



Very common on wet, boggy ground. It occurs especially abundantly 

 in the neighbourhood of the coasts, but is also very common in the 

 valleys further inland, and hardly ascends higher than about 300 metres. 

 Fruit, which is met with very frequently, ripens at the end of June or 

 in the beginning of July. 



