ZYGODON. 129 



Crevices of Alpine rocks. Summer. 



England, Scotland, Wales. 



249. A. Mougeotii, B. and S. St. more than 1 inch, 

 caespitose, scarcely radiculose. L. fasciculate, recurved, 

 narrowly linear-lanceolate, margin reflexed below, 

 nerved to apex, scarcely contorted when dry. Caps, 

 turbinate, urceolate when dry, S^striate, lid with a 

 long, very oblique beak. Dioicous. 



Moist shady rocks. Summer, 



44 ZYGODON, Hooh. and Tayl 



a. Peristome absent. 



250. Z. viridissimus, Dicks. St. i — 1 inch, fastigiate, 

 radiculose below. L. squarrose, recurved, widely 

 lanceolate, somewhat contorted when dry, minutely 

 papillose, nerve sometimes slightly excurrent. Caps, 

 obovate, obscurely 8-striate, lid with a long, oblique 

 beak. Dioicous. 



Trees. March, April. 



Var. /8. EUPESTEis. {Stirtoni, Schp.). L. ligulate, 

 not tapering to apex, nerve generally reddish and 

 translucent, excurrent into a mucro. 



Rocks. Not unfrequent. 



England, Scotland, Ireland. 



h. Peristome double. 

 1 . Inner peristome fugacious. 



251. Z. conoideus, Dicks, St. very short, caespitose, 

 fastigiate, densely radiculose. L. somewhat spreading, 

 not recurved, linear-lanceolate, with plane margins, and 

 nerved nearly to apex. Caps, arcuate, oval, tapering 

 below, 8-striate, lid with a long, straight beak. Perist. 



