THE BRYOPHYTA OF ICELAND 427 



altitudc of ahnost 500 metres. cT piants are common, fruit rather rare. 

 The majority of the piants bear gemmæ. 

 Var. f/rtnrnffff(f (Mass.) C. M. 



S. Iccland: Heykir!; Vestmannaey !. N\V. Iceland: Armulil. 



Var. rosacea Corda) Carr. is only exceptionally niet with typically 

 (leveloped, while forms transitional between the present variety and the 

 type are rather common. 



The plant is usually green or brownish-green. more rarely reddish. 

 ()n damp ground it beconies larger and approachcs S. irrigiia. The 

 leaves vary somewhat in form. The antical lobe is usually pointed, in 

 the lower leaves it is, however, often rounded; it is more rare for all 

 the leaves to be rounded. Tlie leaf-cells are as a rule thin-walled or 

 somewhat thickened at the angles. Forms with highly thickened, red- 

 dish-brown cell-walls are more rare, and occur always in exposed localities. 



86. Scapania Bartlingii (Hampe) Nees. 

 Scapania Carestiae de Not. 



S. Iceland: Drangshlid associated witli Amphidhim Moiigeottii and 

 Brynm archangeliciim v,H.J.)!. 



Note. Scapania nemorosa is enumerated in the majoritj' of the 

 older lists, but all the specimens in the collections belong to Sca- 

 pania undnlata. 



F.\M. RADULOIDEÆ. 

 87. Radula complanata Dum. Gottsche. 



S. Iceland: Hornafjordurl. E. Iceland: Hof!;Djupivogur!; SeydisQordur!. 

 X. Iceland: Thrastarholsårgil, fr. (O. D.)!. W. Iceland: Flatey (Grl.)!; 

 Budahraun (H. J.;I. Common in SW. and S. Iceland I. 



The plant is common in E., W. and S. Iceland, while it appears to 

 be absent from NW. Iceland and to be rare in N. Iceland. 



It occurs onl}' in the lowlands and rarely ascends higher than 

 about 300 metres. In a few localities in Esja and near Kolvidarhol it 

 was collected at an altitude of about 400 metres. It grows especially 

 on dry, or only slightly damp, shaded rock-sides, mostly in clefts and 

 caves, in company with Melzgeria fiircata, Lejeiinca cavifolia, etc. , and 

 often bears gemmæ and in S. Iceland fruit also. It was sometimes col- 

 lected on the bark of trees, viz. on birch on Flatey and on mountaia 

 ash in Budarhaun. 



Fam. MADOTHECOIDEÆ. 



88. Madotheca Cordæana (Hiibener) Dum. 



Madotheca rivularis (Dicks.) Xees. 



"In Islandia" (Morch;!. E. Iceland: Hof!; Seydisfjordur (H. J.)!; Beru- 

 fjordur!. NW. Iceland : DyraijordurI at an altitude of about 150 metres; 



28* 



