THE BRYOPHYTA OF ICELAND 473 



tain no specimens from these localities it cannot be decided which 

 species is meant. 



129. Pohlia tenuifolia (Schimp.). 

 Webera biilbifera Warnst. 



E. Iceland: Hamarfjordur!; Berutjordur!; Seydistjordurl. N. Iceland: 

 Geitaskardl; Hnausar!. W. Iceland: Reykjavik! ^. ' 



P. tenuifolia is the most frequent of the small gemmiferous species 

 of Pohlia. It usually grows on damp sandy soil, and often very abun- 

 dantly, always bearing the characteristic gemmæ. Near Geitaskard it 

 covered in company with species of Bryiim the bottom of a dried up lake. 



The leaves in all the Iceland piants are very longly decurrent. 



130. Pohlia grandiflora H. Lindberg. 



S. Iceland: Reykir!; Laugarvatn! (^ ■ Barkarstadr !; Midskålagil near 

 Holt!; cave near Steinafjall!. 



Near Reykir it was growing on the ground along a stream, asso- 

 ciated with Dicranclla crispa. Pogonatiim urnigernm. Scapania curta and 

 Lophocolea niinor. Near Laugarvatn it was found abundantly on a warm 

 clayey flat, associated with Aongstrcemia longipes, Gijmnocolea inflata and 

 a small sterile Philonotis. (^ flowers were very numerous, but gemmæ 

 were absent. In the other piaces it was found on faces of tuff rocks, 

 associated with Bartramia ityphylla, Pohlia cnida, Didy moden rabclliis 

 and Distichiiim montanam. The gemmæ were quite typical in all these 

 species. 



Pohlia tenuifolia is an excellent species, easily known, even when 

 gemmæ are absent, by the strong sheen and the narrow, longly decurrent 

 leaves, in the upper half of which the cells are very narrow and often 

 wavy. 



131. Pohlia proHgera Lindb. 



N. Iceland: Vidirayri!. 



It grew here rather scantily on damp sandy ground along a stream, 

 bearing typical gemmæ. 



132. Mniobryum albicans (Wahlb.) Limpr. 



Pohlia albicans Lindb. 

 Verj' commou. 



Var. gfacialis (Schleich.) Limpr. 



Very common. 



Both the type and the variety are the most common mosses every- 

 where on damp ground. The type grows on the ground along streams, 



The Botanj- of Iceland. Vol. I. part II gj 



