THE BKYOPHYTA Ol ICELAND 435 



with Haplozia crenulata and Fossombronia Dumorticri. more rarely with 

 Gymnocolea inflata. It is almost ahvays sterile; on piants from Thor- 

 lakshver flowers as well as a few ripe capsules were found. besides, 

 here and there at the bottom of the tufts. the characteristic large 

 spores (9. 6. 1912. 



Xote. Phascum cuspidatum, Ephemerum scrratiim and Sphærangium 

 nuiticnm are enumerated on older lists, but no specimens of Ihese 

 species are to be found in the collections and their occurrence in Ice- 

 land is very improbable. 



fam. weisia(:i:æ. 



3. Gymnostomum rupestre Schleich. 



E. Iceland : Geithellirl. N. Iceland: Akureyri!; Modruvellir: Hof 

 (O. D.):. W. Iceland: Brynjudalur (Grl.) I; Esjal/ S. Iceland: Skålholt!; 

 Thingvellirl. 



Around Eyjatjordur it is common on damp rocks up to a height 

 of about 300 metres; it was also found in numerous localities in SW. 

 and S. Iceland and is common. for instance in Esja. It occurs especi- 

 ally on damp rock-sides near waterfalls and in clefts. often forming 

 €xtensive mats; now and then it is also found in dr\' localities. Only 

 sterile specimens have been found. 



4. Hymenostylium curvirostre (Ehrh.) Lindb. 

 Barbula ciiruirostris Lindb. 



X.Iceland: Mwatn (Grl.)!. W. Iceland: Reykholt (Grl.)!, in both 

 localities sparingly and also sterile. S. Iceland: Merkjåfoss (F.)I; Bar- 

 karstadr, fr. !: Holt. fr. !; Vestmannacy, fr. !. 



In S. Iceland the plant is no doubt common on faces of damj) tufT- 

 rocks. In several localities near Barkarstadr and Holt it occurrcd 

 abundanth' in clefts along rivers or in caves and in depressions in tutf 

 rocks: it was usually richly in fruil. and associatcd with Preissia com- 

 mutala, Fegatella, Haplozia riparia, ctc. On •"Kleven" on the island of 

 Vestmannacy it grcw on the face of a tuff rock, through which watcr 

 was percolating. forming with Haplozia riparia large cushions which 

 were saturated with water. 



5. Anoectangium compactum Schwgr. 



Pleurozygodon æstivus (Hedw.) Lindb. 



"In Islandia" leg. Morch! and ilgured in Flora Danica, tab. 1893, 

 lig. 2. under the name of Gymnostomam curvirostre. 



E. Iceland: Se\'disfj6rdur, common!: Berufjordur. common!. W. Ice- 

 land : Grundarfjordur H. J.!: Hafnarfjordur :,Grl.;!y; Esja!; Svinahraun!. 

 S. Iceland: very common!; Vestmannacy!. 



This plant is very common in S., SW. and E. Iceland. but it does 

 not appear to occur in X. and XW. Iceland. It grows espccially on damp 



