THE BRYOPHYTA OF ICELAND. 543 



hypnoides at an altitude of about 450 metres. Only sterile specimens 

 have been found. 



323. Hylocomium loreum (L.) Br. eur. 



\V. Iceland: Esja (Grl.;!), common up to about 400 metres above 

 sea-level; common in the coppices of the district of Borgarfjordur!; 

 Berserkjarhraun; Arnarbotn ; Budahraun (H. J.)!; Stykkisholmur ! ; Bryn- 

 judalur (Grl.)!; Hafnarfjordur (Grl.;!); Svinahraun !; Kolvidarhol!, up to 

 about 350 metres. NW. Iceland: Sugandafjordur!, up to about 2f>0 me- 

 tres; Dvrafjordur!, up to about 200 metres. S. Iceland: Widely distri- 

 buted!; Thingvellir!; Laugardalur !. 



Widely distributed in the whole of the southern and south-western 

 part of Iceland as far as Borgarfjordur and Snaefellsnes. It also occurs 

 rather plentifully in some of the fjords of the north-west. It grows 

 sometimes in clefts among fallen blocks of rock, sometimes on slopes 

 together with other Hijlocomiiim spp.. Dicranam scoparium , Rhacomi- 

 trium spp., etc., or in the birch coppices. It was collected in fruit 

 near Holt in S. Iceland, where a few old, empty capsules were found. 



324. Hylocomium triquetrum (L.) Br. eur. 



Iceland (Koenig). E. Iceland: Frequent from Berufjordur south- 

 wards!. N. Iceland: Asbyrgi!; near Eyjafjordur (O. D.;!); Ljosavatn 

 i Grl. ;!); common west of Blondudalur!. NW. Iceland: Rather common 

 in all the fjords !. W.Iceland: Rather common everywhere (Grl.;!). Vest- 

 mannaey!. S.Iceland: Common!. 



Commonly distributed from Berufjordur in E. Iceland throughout the 

 whole of S., SW. and W. Iceland, and in the majority of the fjords of 

 the north-west. It is rather rare in North Iceland proper, east of 

 Blondudalur, and occurs, as a rule, only scantily in the coppices or in 

 the Betnla nana heath. 



Its growth is similar to the other species of Hylocomium, with 

 which it is almost always found associated, especially in coppices and 

 on moss-grown slopes. It has the same altitudinal distribution as H. 

 loreum and H. parietinum, as it hardly ascends higher than to the upper 

 limit of the birch. In Esja it is common up to 350400 metres, near 

 Kolvidarhol it was found in company with H. loreum at 350 metres, 

 and in NW. Iceland it everywhere accompanies the birch to its upper 

 limit at about 250 metres. Only sterile specimens have been found. 



325. Hylocomium squarrosum (L.) Br eur. 



Very common over the whole of Iceland. 



It grows both on a damp substratum, on stony flats as on boggy 

 ground, and on a more dry substratum, associated with other Hijloco- 

 minm spp., Hyp mini iincinatum, etc. It is most frequent in the low 

 land, but occurs, however, also at rather considerable altitudes. In 

 Berufjardarskard it was found even at 500600 metres, near Dyra- 

 fjordur at 330 metres and in S. Iceland in many places up to about 



