THE BRYOPHYTA OF ICELAND 421 



64. Cephaloziella rubella (Nees.) Warnst. 



Typical specimens of this species were collected in the following 

 localities: 



S.Iceland: Hornafjordur!. E. Iceland: Seydisfjordur!. X. Iceland: 

 Hafrardalur (St.)!; Akureyri!, at an altitude of about 500 metres!; Hof 

 (O. D.!). SW. Iceland: Kollafjordur!. S. Iceland: Holt!. 



It was found everywhere woven into tufts of Sphagnum spp. and 

 Dicranum spp. (D. fuscescens and D. angiistum] and usually mixed with 

 Cephalozia bicuspidala and Lophozia spp., now and then also with C. 

 Hampeana. Near Isafjordur it grew sparing!}' in a tuft of Mnium hornum, 

 which was densely interwoven with Cephalozia pleniceps. It was col- 

 lected everywhere in fruit. 



C. rubella is an uncertain species which when sterile is in many 

 cases hardly distinguishable from C. Hampeana. 



C. dwaricata and C. bifida are recorded from several places in Ice- 

 land, but the specimens belong either to C. Hampeana or to C. rubella. 

 Gronlund's C. dwaricata from Melar is Lophozia quadriloba. 



65. Odontoschisma Sphagni (Dicks.) Dum. 



W. Iceland: Snaeldubeinstadahver in Reykholtdalur!. 



It was found in the above locality in small quantity woven into a 

 tuft of Sphagnum rubellum on a warm substratum. 



This species is recorded from Iceland in several old lists and is 

 figured in Flora Danica, tab. 2251 (leg. Morch), but all the specimens 

 found in the collections under this name are those of 0. elongatum. 



66 Odontoschisma elongatum (Lindb.) Evans. 



"In Islandia" (Morch!). E. Iceland: Hof!; Lon!; frequent near Sey- 

 disfjordur!. X. Iceland: Hvarf (St.)!; Akureyri!. \V. Iceland: Budahraun 

 (H.J.)!; Grund in Skorradalur!; common around Reykjavik!. S. Iceland: 

 Holt! at an altitude of about 400 metres. 



It grows usually woven into tufts of bog mosses such as Sphagnum, 

 Hypnum and Oncophorus spp., Meesia trichoides, Lophozia Kunzeana, 

 more rarely upon moss-tufts or on wet ground, in small brownish tufts. 

 Only sterile specimens have been found. 



A specimen collected by Morch, having tiny, inconspicuous under- 

 leaves and less thickened cell-walls bearing fine warts, forms a transi- 

 tional form to 0. Sphagni. 



67. Odontoschisma denudatum (Mart.) Dum. 



W. Iceland: Braudarholt near Reykjavik! JV 



It grew in the above locality on boggy ground among other Bryo- 

 phyta. 



