(310 A. HESSELHO 



tare, M. orthorrhynchnm, Brynm ceneum, B. inclinatnm, B. pallescens, 

 B. ventricosum, Mniobrynm albicans (common), Pohlia crnda, Plagio- 

 brynm Zierii, Anomobryum fill forme (in one place in fr.), Amphidium 

 Mougeottii, A. lapponicnm, Anccctangium compaclum, Hymenostylium 

 curvirostre, Blindia acuta, Ditrichum flexicaule, Distichium montannm, 

 Barbula cylindrica, Didymodon rnbelhis, Tortella toriuosa, T. frag His, 

 Grimmia apocarpa, Myurella jnlacea, Haplozia riparia, H. atrovirens, 

 Madotheca Cordcearia, Lcjcnnea serpyllifolia, Radnla complanata, Met:- 

 geria fnrcata, Chiloscyphns polyanthus, Lophocolea cuspidata (scanty). 

 Scapania irrigna, Lophozia qninqnedentata, L. M filler i and Anenra 

 pingnis. The moss- carpet covering dry rock-faces and large blocks 

 was chiefly composed of Hylocomium loreum (also in fr.), H. proli- 

 fernm, Hijpnum uncinatum, H. hamulosiim and H. callichronm. In a 

 dry cave above the cleft there grew Neckera complanata, Brachythe- 

 cinm popnleiim, B. velutinum, Plagiothecium denticnlatnm, P. depressnm, 

 Isothecmm tenuinerue, Mnium cuspidatum, and on the roof of the 

 cave there grew Amblystegium Sprncei and Blepharostoma. 



The southern side of Drangshlidarfj all and the small neigh- 

 bouring group of mountains, Hrutafjall (Fig. 34), consist, in a 

 great measure, of dry, lofty faces of tuff-rock, as much as 200 metres 

 high, the base of which is moss-grown. One of the commonest 

 species here is Leucodon sciuroides var. morensis which covered the 

 rock-face for a considerable distance upwards with its extensive and 

 often richly-fruiting mats. The following species were also com- 

 mon : Homalotliecinni sericeum, Pterigynandrum filiforme, Hypnani 

 revolutnm and Grimmia torquata. At the foot of the rock-faces there 

 grew Isothecmm mynriim (in abundance), Orthotrichum rupestre, 

 Didymodon riibellus, Barbnla cylindrica, Brynm capillare, Tortella 

 tortnosa, Encalypta cillata, Neckera complanata, Myurella jnlacea and 

 Metzgeria furcata, and where the water was oozing through cracks 

 and crevices the rock-face was covered with Blindia acnta inter- 

 mixed with Hypnnm mollnscnm , H. palnstre and the rare Anomo- 

 brynm concinnalnm. 



Among the large blocks of tutT on a small Urd there grew, 

 among others, Mnium iindnlalum, Enrhynchinm pilifernm, Hhyncho- 

 stegium murale (abundantly), Amblystegium Juraizkamim , Leskea 

 neruosa and Lejennea cavi folia. 



The walls in the interior of a ralher dry, open cave, were 

 covered with Preissia commntata, Fegatella conica, Marchanlia poly- 

 morpha, Distichium montanum, Bryoxiphinm noruegicum,Ancectangium 



