440 A. HESSELBO 



both quite young capsules and also old lidless capsules. In Gnupsdalur 

 it grew along the banks of streams with Scapania subalpina and Cepha- 

 lozia bicuspidata. 



20. Dicranella cerviculata (Hedw.) Schimp. 



Iceland: (Morch)!. NW. Iceland: Stadr on Snaefjallastrond ^Stp.)!; 

 Dynjandi!. W.Iceland: Borgarnes!; Kollafjordur!; Reykjavik (Grl.;!). S. 

 Iceland: Thjorsa (Stp.)!. 



The plant was found everywhere in fruit. Near Borgarnes and 

 Reykjavik the fruit was almost ripe at the beginning of August. It grows 

 on peat, especially on the rather dry margins of turf pits and ditches 

 and occurred abundantly especially in several places near Reykjavik. 



21. Dicranum fulvellum (Dicks.) Sm. 



Collected in Iceland by Morch (no doubt near Middalurj and 

 figured in Flora Danica, tab. 2002, under the name of D. Morchianum 

 Hornsch. S. Iceland: Holt!; Seljaland!; Thingvallahraun!. SW. Iceland : 

 Svinahraun !. 



This species is recorded by Gronlund from Svinaskard and Thing- 

 valla, but the specimens from both localities are wrongly determined, 

 being really D. falcatum and D. Blyttii respectively. 



Dicranum fulvellum has been only found in the south-western part 

 of Iceland, where it appears to be frequent. In Svinahraun, where the 

 altitude hardly exceeds 300 metres, it was found rather sparingly (June 

 3rd) on the top of lava-blocks, in fruit which was almost ripe. On 

 Eyjafjall it occurred in several localities above Holt and Seljaland at 

 an altitude of 300700 metres. It grew either on blocks of basalt or 

 more rarely on gravelly ground in company with Gymnomitrium concin- 

 nalum. At the end of July the fruit was ripe everywhere, and generally 

 the capsules had thrown off their lids. 



22. Dicranum Andersonii (Wich.) Schimp. 



SE. Iceland: Hof!; coastal cliffs near Alftafjordur!. S. Iceland: Holt!; 

 Vestmannaey !; Thingvellir!. 



Near Hof it occurred rather commonly on low basalt ridges, where 

 it usually grew in crevices in small cushions about 3 cm. high. Here 

 the fruit had just ripened on June 15th and the lids still persisted. 

 Near Holt it was found rather frequently on tuff rocks up to a height 

 of about 300 metres. Thus, it grew abundantly, for instance on the 

 vertical northern face of a tuff rock sometimes in small tufts, sometimes 

 mixed with Grimmia apocarpa, Pogonatum nrnigernm, Pohlia grandi flora. 

 Anthelia nivalis and Gymnomitrium concinnatnm. On Vestmannaey the 

 plant grew abundantly on blocks of lava lying on the slope of Helga- 

 fell. It occurred there everywhere in small scattered tufts associated 

 with Grimmia apocarpa, Rhacomitrium siidelicnm. R. fasciculare and An- 

 drecea petrophila. The fruit was ripe on July 5th; a few had thrown 

 off their lids. 



