THE BRYOPHYTA OF ICELAND 491 



This species is no doubt rather widely distributed, but often over- 

 looked on account of its great resemblance to the far more frequently 

 occurring M. piinctatnm. Like the latter it grows on wet boggy ground. 

 Fruit was unripe both near Hornafjordur (June llth) and near Stadr 

 (July 29th). 



177. Cinclidium stygium Sw. 



Very common. 



In East and North Iceland this species is one of the mosses of 

 most common occurrence, and is found everywhere in bogs, where it 

 is often the most abundant constituent of the vegetation. Here it grows 

 by preference in the wettest parts, growing even in the shallow water 

 on inundated ground or along streams, but it occurs also on more dry 

 ground, and then usually mixed with other bog mosses, for instance. 

 Hypna, Mnia and Sphagna. In the other parts of the country it is also 

 common, although there it does not occur so abundantly; in South Ice- 

 land I have only observed it growing intermixed as a rule scantily 

 with other bog mosses in, I think, every bog, but never in large 

 growths. Near Akurej r ri it is frequent as far upwards as about 600 

 metres above sea-level, and in East Iceland, for instance near Berufjordur, 

 it was collected up to a height of 550 metres. The fruit, which is 

 common especially in North Iceland, ripens at the end of July. 



Note. A small sterile plant, collected by Helgi Jonsson near 

 Hofdi, was by C.Jensen referred with doubt to Cinclidium subrotun- 

 dnm, but a closer investigation has proved that it must be referred to 

 C. stygium. 



FAM. MEESEACE^E. 

 178. Paludella squarrosa (L.) Brid. 



This species has a similar distribution to that of Cinclidium stygium. 

 It grows in bogs and is exceedingly common especially in N. Iceland, 

 where it sometimes occurs mixed with other bog mosses, sometimes in 

 large, pure cushions. It is also common in E. Iceland, at any rate from 

 Berufjordur northwards, in NW. Iceland and in W. Iceland. In S. Iceland 

 it is far more rare, and has not been found, for instance, on Fljotshlid 

 or below Eyjafjall. It does not appear to ascend very much higher 

 than about 400 metres above sea-level. Fruit was found only near 

 Eyjafjordur. 



179. Amblyodon dealbatus (Dicks.) P. Beauv. 



N. Iceland: Hof near Eyjafjordur (O. D.)!, fr. 



It was growing here scantily, intermixed in a tuft of Distichium 

 montanum, Ditrichum flexicaule, Myurella julacea, etc. 



180. Meesea trichoides (L.) Spruce. 



Meesea uliginosa Hedw. 

 Very common. 

 This species grows especially on boggy ground, but is also frequent 



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