20S OLAF GALL0E 



Solorina saccata (foliaceous lichen; fertilel 



Psoroma hypnorum (crustaceous lichen: fertile). 



Lecidea elaeochroma v. niuscorum (crustaceous lichen; fertile). 

 Baeomyces byssoides (crustaceous lichen: sterile). 

 Lecanora tartarea ; sterile and fertile). 



Buellia parasema v. muscortim (crustaceous lichen; fertile). 

 Caloplaca Jungermanniae crustaceous lichen: fertile). 

 Lecidea vernalis ). 



assimilata ). 



Rinodina mniaraea v. cinnamomea crustaceous lichen: fertile). 



In all, 9 crustaceous lichens, 7 foliaceous lichens and 6 fruti- 

 cose lichens. 



I observed a similar damp mountain-heath, but smaller in ex- 

 tent, on Husavikrfjall near Skjalfandi (North Iceland). Here also 

 the phanerogamic vegetation consisted mainly of Empetrum (F /o 

 100) and Cyperacece (F ,o 100), as also of Vacciniiim iiliginosum (F o 

 80), Azalea procumbens (F % 80), Salix spp. (F /o 40), grasses (F ., 

 20), and some Akhemilla alf>in<i. also lichens (F /o 100). Here 

 also the heath was knolly, and all the lichens occurred upon the 

 knolls. The crustaceous lichens were dominant. 



The following species occurred : 



Stereocaulon denudatum fruticose lichen ; sterile). 

 Cetraria hiascens (foliaceous lichen; sterile). 



Peltigera lepidophora i ). 



aphtosa ). 



Psoroma hypnorum crustaceous lichen; fertile . 

 Lecanora tartarea ; sterile). 



Bacidia flavovirescens ( 



Lecidea assimilata ; fertile). 



Bffiomyces byssoides ( : sterile). 



An undeterminable, sterile crustaceous lichen). 

 (Lepraria). 



There still remains to be mentioned a small tract of very wet 

 heath which was observed on VaSlaheiSi, on the mountains between 

 Kyjafjordur and Fjoskadalur, where the plant-growth on the 3rd of 

 July, 1911} had recently been bared of snow and was just coming 

 into leaf. 



The soil was wet, peaty and springy from the roots of the 

 plants, and was partially covered with Cyanophycew. The phanero- 

 gamic vegetation, which was very low in growth and poorly deve- 

 loped, consisted of dwarf willows (F /o 95), Cyperacece (F /o 80), 

 (:<issi<>/>e luipuuides (F /o 45), Akhemilla alpina (F" / o25) and a few 

 others which were not very conspicuous (e. g. Azalea ]>rocnmbens, 



