THE BRYOPHYTA OF ICELAND 



compactnm (all in abundance), Reboulia hemisphcerica , Mniuin or- 

 thorrhynchum, Fanaria hygrometrica, Bnjnm ccneum, B. inclinatuni, 

 Orthothccium intricatum, Blepharostoma trichophyUiim and, where it 

 was somewhat damper, with Eurhynchium Swartzii. 



Fig. 34. Hriitafell south of Eyjafjallajokull. Tlie perpendicular face of tuff-rock in the 

 centre, is about 200 metres high, and, at the foot is covered with extensive moss carpets, 



whilst caves occur in many places. 



A very interesting kind of vegetation was found on the dry 



*/ c.* *.} *, 



faces of a small isolated rock, Drangshellir. There grew Leiicodon 

 sciuroides var. morensis, Homalothecium sericenin, Leskea nervosa, 

 Grimmia Doniana, Barbnla mnralis, B. obtusifolia, Orthotrichum ano- 

 malum and 0. rupestre. Half of these species consist of xerophi- 

 lous southern forms, which have their northern limit in South Ice- 

 land, and are there met with only in specially protected localities. 

 Drangshlid, which has a height of 478 metres, protects this locality 



