538 A. HESSELBO 



306. Hypnum palustre Huds. 

 Amblysteginm palustre (Huds.) Lindb. 



E.Iceland: Seydisfjordur!. N. Iceland: Akure\ r ri (Grl.)!; Vidimyri 

 (Grl.)!; Grimstunga (Grl.)!; Ljosavatn!, at an altitude of about 300 metres; 

 Melar (Grl.)!. W. Iceland: Gilsbakki!; Reykholtdalur (Grl.;!); Lundur- 

 revkjadalur!; Reykjavik!; common in Esja!; Alafoss!. S. Iceland: Common!. 



This species is common in S. Iceland (Eyjaljall, Fljotshlid, etc.), 

 SW. and W. Iceland, is found here and there in N. Iceland and is rare 

 in E. Iceland. It has not yet been found in NW. Iceland. It grows 

 everywhere on rocks and stones in and by rivers, and almost always 

 sets fruit, which ripens during July. It does not appear to ascend higher 

 than about 300 metres above sea-level. 



Of the varieties only var. 6 subsphoericarpon (Schleich.) Br. eur. is 

 of any interest. It occasionally occurs in company with the type on 

 stones in swiftly flowing rivers. 



307. Hypnum arcticum Sommerf. 



Amblysteginm Smithii (Sw.) Lindb. 



W. Iceland: Hvammur (Grl.)!. NW. Iceland: Baeir! fr. It is, more- 

 over, recorded from Iceland by Morch and from Akureyri (Grl.), but 

 both the plants are wrongly determined. 



Near Basir it grew on wet rocks by a small waterfall. 



308. Hypnum alpestre Sw. 



Amblysteginm rivulare (Sw.) Lindb. 



E.Iceland: Berufjordur!, common; Seydisfjordur!, common up to 

 about 200300 metres above sea-level; Breiddalskard!, at an altitude of 

 about 400 metres; Vallanes (H. J. ;!), common on rocks along the sea; 

 Skriddalur!. N. Iceland: Oxnadalur!, very common in the river. NW. Ice- 

 land: Isafjordur!, frequent up to about 200 metres; Sugandafjordur!; 

 Arngerdareyri!. W. Iceland: Lundur!. SW. Iceland: The Laxa (F.)!; the 

 Langa (H. J.)!; the Oxarara !. 



Common in E., N. and NW. Iceland, rarer in W. and SW. Iceland. 

 This species has its main distribution in E. Iceland, where it occurs 

 everywhere in the rivers and often covers the stones along the banks 

 for long distances. Fruit, which occurs rather commonly, ripens in 

 July (Oxnadalur, July 24; Vallanes, hardly ripe on June 28th). 



309. Hypnum alpinum Schimp. 



Amblysteginm molle ft alpinum Lindb. 



E. Iceland: Berufjordur!. N. Iceland: Akureyri (Grl.;!); Hof near 

 Eyjafjordur (O. D.)!; Holar (Grl.)! fr.; Laekjarmot! fr.; common in Oxna- 

 dalur! fr., NW. Iceland: Isafjordur! fr.; Dvrafjordur! fr.; Arngardareyri! 

 fr.; Dynjandi! fr. 



Figured in Flora Dan. (tab. 2621, fig. 2 as Hypnnm molle, leg Morch. 



