THE BKYOPHYTA OF ICELAND 439 



Philonotis seriata, Oncophorus Wahlenbergii, Scapania uli(/iiiosa, Haplozia 

 cordifolia and (Ihiloscyphus poli/diilhiis var. fragilis on inundated gravelly 

 ground up to aboul 300—400 metres above sea-level. In N. Iceland it 

 is also rather common. Near Seydisfjordur it was t'oiind only at a 

 height of about 300 to 500 metres above sea-level, but was common 

 therc in small streams associated with Scapania nndiilala, Hijpnum ex- 

 annnlatum, Haplozia cordifolia, etc. In Reykholtdalur this species was 

 found in scveral piaces near hot springs, even on stones in warm water 

 with a temperature of 30 '\ In SW. and S. Iceland it occurs rarely and 

 more sparingly; near Holt it grcw in several piaces at an altitude of 

 150—600 metres. 



The plant is almost ahvays found sterile. One specimen collected 

 by O. 1). near Hof in Eyjafjordur (12. 6. 1897) bore a few capsules which 

 had thrown olf their lids. The (^ plant was found only near Bæir in 

 NNV. Iceland growing in low tufts, about 1 cm. high. 



17. Dicranella Schreberi (Sw.) Schimp. 

 Anisolheciiim crispam iSchreb.) Lindb. 



N. Iceland: Hof near Eyjafjordur (O. 1^.)!; Akureyri $!. W. Iceland: 

 Lundur!. 



Near Akureyri it grew in damp, peaty ground inimediateh' north 

 of the town and near Lundur, associated with Bnjiim lacustre, Aony- 

 slræmia longipes and Dichodontium pcllucidiim, on a wet flat from which 

 the ])eat had been jjared olf. 



18. Dicranella crispa (Ehrh.) Schimp. 



Very common on damp ground, bolh on peat and on sandy or 

 gravelly soil by streams. It occurs only in the lowlands, and has hardly 

 been found higher than at an altitude of about 200 metres. Fruit is 

 always present in abundance and ripens about August Ist. At this time 

 also the setæ of the capsules of the ensuing year have reached their 

 full length. 



Note. Dicranella heteromcdla is recorded by Zoega and Horne- 

 mann from Iceland, but was undoubtedly confused with another species. 



19. Dicranella subulata (Hedw.) Schimp. 

 Dicranella seciinda (,Sw.) Lindb. 



Iceland (Morch)!, some of the specimens are correctly determined, 

 some must bc referred to Dilriclmm homomallum. Krisuvik (Stp.)!. N. 

 Iceland: Husavikl. NW. Iceland: Kaldalon!; Gnupsdalur near Dyrafjordur!. 

 Moreover, Gronlund records it from Hvammur and Thingvellir, but 

 both specimens are wrongly determined, being Dicranella crispa and 

 Die ran nm Blyllii. 



This species was collected in small (juantities only, but everywhere 

 in fruit. Near Husavik it grew on peat, and on July 11, 1909 it bore 



