430 A. HESSELBO 



IL SPHAGNALES. 



1. Sphagnum imbricatum (Hornsch.) Russow. 



S. Aiistini Sull. 



S. Iceland: Thorlåkshver and Laugaråshver near Skalholt!. It grew 

 there on the warm substratum along the outlets from the hot springs 

 in immense j'ellowish-brown cushions as much as 25 cm. deep. 



2. Sphagnum cymbifolium (Ehrh.) Hedw. 



W. Iceland: near several hot springs in Re^'kholtdalur!. S. Iceland: 

 Thorlåkshver!; sydri Rcykjahver!; Laugarvatnshver! ; Hurdarbak (H. J. !). 



In all the above localities it grows on damp ground around hot 

 springs. 



3. Sphagnum medium Limpr. 



NW. Iceland: Bæir!; Årmuli!. S. Iceland: Common in the district 

 around Skalholt!. \Y. Iceland: Re3'kjavik! 



The plant grows everywhere in wet bogs. 



4. Sphagnum papillosum Lindb. 



W. Iceland: Reykjavik!, common on boggy ground; Reykholtdalur 

 (Grl.;!), around numerous hot springs. S. Iceland: Hraun; Grimstadr 

 (H. J.)!; Hraundalshraun (H. J.!; Sydri Reykjahver!. 



In Reykholtdalur Sphagnum papillosum constitutes the bulk of the 

 vegetation around the hot springs and, tor instance at Deildatunguhver. 

 covers large areas of the warm, damp ground with cushions as much 

 as about 20 cm. deep. It appears to be rather widely distributed in 

 S. Iceland and is found there, as near Reykjavik, on the knolis in the 

 bogs, sometimes on a rather dry substratum. 



5. Sphagnum inundatum Russow. 



W. Iceland: Grundarfjordur (H. J.!). S. Iceland: Thorlåkshver!; Sydri 

 Reykjahver!. 



In the two latter localities it grew along the outlets from the hot 

 springs, near Sydri Reykjahver it grew also on the knoils in a small 

 bog near the spring. 



