THE BRYOPHYTA OF ICELAND. 447 



36. Campylopus flexuosus (L.) Brid. 



N. Iceland: Myvatn (Gri. !; Reykir near Svinavatn (Grl.)!. \V. Iceland : 

 Near hot springs in Reykholtdalur: Deildatunguhver (Grl.;!;; Skribla (Grl.)!; 

 Hagindishver!, etc. 



This species has been found only on steaming clayey flåts near 

 hot springs in North and West Iceland. In Reykholtdalur it is frequent 

 on a warm substratum, and was found, for instance near Deildatungu- 

 hver, in large mats, about 2 cm. deep, on warm clayey flåts with a tem- 

 perature of about 40^ just below the surface. 



37. Campylopus fragilis (Dicks.) Br. eur. 



S. Iceland: Laugarashver near Skålholt. 



It grew there on warm clayey flåts close to the outlet from the 

 spring. 



38. Trematodon atnbiguus (Hedw.) Hornsch. 



W. Iceland: near Borgarnes!. 



It grew there rather scantily on damp peaty soil by the road, in 

 Company with Bryum inclinatuni, Pogonatum naniim , Scapania ciirta, 

 etc. The fruit had just ripened on Aug. 2nd, but the lids had not 

 been thrown off. 



Note. Leiicobryiim ylaiiciim is recorded b}' Vahl and Horne- 

 mann as found in Iceland, but neither the name of the finder nor 

 the habitat is given. No specimens of this species are to be found in 

 the collections. 



Fam. fissidentaceæ. 



39. Fissidens bryoides (L.) Hedw. 



N. Iceland: Hof near Eyjafjordur (O. D.)!. S. Iceland: Krokur (H. J.)! 

 Almannagjå!. 



In Almannagjå it grew very scantily among other mosses on soil- 

 covered stones at the bottom of a lava-cleft. Near Hof it grew on 

 damp ground by a waterfall. The fruit, on the specimens from both 

 localities, was ripe when collected (June 12j. 



40. Fissidens osmundoides (Sw.) Hedw. 



Common on damp ground in bogs, at the base of rocks, in rock- 

 clefts, etc, sometimes in low, dense tufts, sometimes mixed with other 

 mosses. The piants are almost always found sterile. Onh' in Reyk- 

 holtdalur, where it grows very abundantly on warm, bogg}' ground, has 

 it been collected in fruit. It is most widely distributed in the lowlands 

 up to about 300 metres above sea-level. but it may occur, although 

 scantily, as high as about 500—600 metres. 



