THE BRYOPHYTA OF ICELAND 431 



6. Sphagnum Gravetii Russow. 



N\V. Iceland : Hesteyri !. 



It grew there in pools in company with a very large form of 

 Hypnnm revolucns v. Cossoni. 



7. Sphagnum compactum De Candolle. 



S. rigidum Schimp. 

 S. Iceland: Nuphlidarhals near Krisuvik (Stp.)!. 



8. Sphagnum teres (Schimp.) Angst. 



Very common everywhere on damp ground up to a height of about 

 600 metres above sea-level. 



S. teres is the most commonly occurring species of this genus and 

 is almost as frequent in the lowlands as in the Alpine region, at high 

 levels. It grows both on knolls in bogs and on more or less damp 

 slopes and is also common on warm ground. 



It is almost always green or pale yellowish-green in colour. Forms 

 with appressed leaves are by far the most frequent; f. squarrosulum 

 (Lesq.) is met with here and there, e. g. : Esja, Akureyri, Stadr near 

 Hrutafjordur and Laugarashver. The walls of the chlorophyll-cells are 

 very often distinctly papillose. Only sterile specimens have been found. 



9. Sphagnum squarrosum Crome. 



N. Iceland: Mvvatn (Grl.!); Litlu Borgarkatlar (St.) ! ; Grimsey (O. D.)!. 

 N\V. Iceland: Isafjordur!; Grunnavik!; Sugandafjordur!. 



In NW. Iceland it is rather common up to about 300 metres above 

 sea-level. It grows there sometimes on knolls in bogs and sometimes 

 on more dry ground, thus, near Isafjordur it grew in several places on 

 slopes stretching down towards the rivers. Only sterile specimens have 

 been found. 



10. Sphagnum fimbriatum Wils. 



X. Iceland: Akureyri!; Geitaskard!. NW. Iceland: Dynjandi!; Laugar- 

 land!. \V. Iceland: Ketilstadr (H. J.)!; Stykkisholmur (H. J. ; !) ; Xordredalur 

 in the district of Borgarfjordur!. S. Iceland: Geldingsey (H. J.)!. 



This plant grows usually on very wet ground in bogs and is no 

 doubt commonly distributed in northern and western Iceland. Thus, 

 near Stykkisholm it was common in bogs, and also around Akureyri 

 where it occurred abundantly up to about 400 metres above sea-level. 



11. Sphagnum Girgensohnii Russow. 



E. Iceland: Eskifjordur (H. J.)!; common near Seydisfjordur!. N. Ice- 

 land: common near Eyjafjordur (O.D.;!); Geldingafell (St.)!; Hafrardalur 



