448 A. HESSELBO 



41. Fissidens adianthoides (L.) Hedw. 



N. Iceland: Hof near Eyjafjordur , fr. (O. D.)!. W. Iceland: Klepp- 

 jarnsreykir (Grl.!); Laugarnir near Reykjavik (Grl.)!; bog near Reykjavik, 

 fr. !; Kollafjordur! 



Rare and scanty on boggy or warm ground. 



Note. Fissidens taxifolius is recorded by Z o e g a and H o r n e m a n n 

 from Iceland (without finder, habitat or specimens in the collections) 

 and by Gronlund from Myvatn; but Gronlund's specimen belongs to 

 F. osmundoides. 



42. Fissidens decipiens De Not. 



W. Iceland : Sandur (H. J.)!; Hafnarfjordur!. 



This plant grew in both localities in lava-clefts, associated with 

 Lejennea serpy Hi folia. 



FAM. SELIGERIACE.E. 

 43. Blindia acuta (Huds.) Br. eur. 



Very common on wet rocks in or by rivers and waterfalls up to 

 about 400500 metres above sea-level, occasionally also on the ground 

 and often in great abundance. The fruit, which is almost always pre- 

 sent, ripens in the beginning of July. 



At a greater altitude it occurs more scantily, but may nevertheless 

 be met with as far upwards as 600700 metres. 



FAM. DITRICHACE.E. 



44. Ceratodon purpureus (L.) Brid. 



Common on rocks, lava-flats, sandy soil, peat, etc. especially in 

 N. and NW. Iceland, and on lava-flats in the interior of the country. 

 It is less frequent in E. and S. Iceland. The fruit, which is usually 

 present, ripens in the first half of July. 



It varies considerably, especially in leaf-form. Forms with shortly 

 pointed or almost obtuse leaves (var. brevifolius) are the most frequent. 



45. Ditrichum tortile (Schrad.) Lindb. 



E. Iceland: Seydisfjordur!, sterile. 



It was growing there on damp gravelly soil along a river, inter- 

 spersed in a Hepaticse-mat formed by Alicularia scalaris, A. geoscypha, 

 Anthelia Juralzkana, Lophozia ventricosa, etc. 



46. Ditrichum nivale (G. M.) Limpr. 



E Iceland: Rerufjardarskard!, at an altitude of about 500 metres, fr. 

 The plant was growing very scantily in a cushion of Anthelia 

 Juratzkana. 



