188 



?n.l. Hyocomiiim flagellare, 

 n.l. Stereodon resiipinnatus, 

 — hamiilosiis, 

 Isopterygiiim elegans, 



Plagiotheciiim iindiilatiim, 

 — denticiilatiim 



var. Donii, 

 Pterigophylhim liicens. 



Of the 33 Hepaticae 6 are c, 14 w. c. and 13 Atl., of the 7 

 Sphagna 5 c. and 2 w. c, and of the 50 Musci frondosi 23 c, 16 

 w. c. , 9 Atl. and 2 alp. arct. forms. The species marked n. 1. pro- 

 bably attain their northern limits in the Færoes. The above list might 

 certainly be reduced to about one half, if Iceland were more 

 thoroughly explored, when probably the c. and alp. arct. forms 

 would be found in that country especially abundant. Of southern 

 forms, especially Mediterranean-Atlantic, that reach the coast of the 

 Færoes, may bementioned: Fiinaria attenuata (on Ostero, near Gote), 

 Mollia flavovirens (on Vaago, near Bosdalafos), Martinellia geniculata 

 (on Stromo, near Thorshavn), hitherto only found in Italy, on the 

 south side of the Alps. 



Common or frequent on the islands and characterizing the 

 vegetation are: — On sea-cliffs: Weissia maritima, Grimmia maritima. 

 On stones and rocks in the interior: Radiila commiitaia, Grimmia 

 microcarpa, Grimmia fasciciilaris. In rills or on their horders : Nardia 

 obovata, Jiingermania cordifolia, Bryiim ventricosiim var. atlanticum, 

 Anisotheciiim squarrosiim, Amblystegiiim revolvens. On moist, wet 

 or boggy ground: Friillania Tamarisci, Lejeunea patens, Pleurozia 

 purpurea, Herberta adnnca, Martinellia gracilisf Diplophyllum albicans, 

 Sphagnum subnitens, Polytrichum subrotundum, Astrophyllum hornum, 

 Breutelia chrysocoma, Fnnaria obtusa, Diphysciam sessile, Mollia 

 litoralis, Campylopus atrovirens, Campylopns Schwarzii, Dichodontium 

 pellucidum, Grimmia hypnoides, Amblystegium sarmentosum, Isothe- 

 cium tenuinerve, Hylocomium loreum, Plagiothecinm undulatum. On 

 moist, gravelly ground in higher regions : Anthelia julacea, Grimmia 

 elliptica, Andreæa alpina. On mountain-summits : Grimmia hypnoides, 

 Grimmia canescens var. ericoides. 



We may presume that the geographical situation and the to- 

 pography of the various parts of the islands in some degree in- 

 fluences the vegetation; especially that Sydero, the most southern 

 island, possesses a vegetation somewhat differing from that of the 

 other islands. The following comparisons may help to solve tliis 

 question. 



