THE BRYOPHYTA OF ICELAND 429 



Besides in the tuff districts, it is also ratlier frequent in the lava- 

 fields where it grows at the bottom of deep, damp clefts, but as a rule 

 only in small quantities. Sterile specimens only have been found. 



Fam. anthocerotaceæ. 



93. Anthoceros punctatus L. 



W. Iceland: Reykholtdalur (Ho.; Grl.;!). S. Iceland: Reykirdalur!; 

 Sydri Reykjahver!. This species was first collected by Ko enig and 

 ligured in Flora Danica, tab. 396. 



It occurs near the majority of the hot springs in Reykirdalur. It 

 grows there abundantly on damp clay-flats with a temperature of 20° 

 — 30°, associated with Fossombronia, Haplozia creniilata and Archidium, 

 especially on slopes immediately above the hot water. It almost alwajs 

 bears numerous capsules. 



