42 SYNOPSIS OF BRITISH MOSSES. 



127. Amblystegium, Schp. PI. small and ascending, 

 irregularly branched. L. soft, singly nerved, rarely 

 nerveless, cells partly prosenchymatose, partly paren-* 

 chymatose, lax. Caps, on a smooth seta, suberect op 

 cernuous, oval or arcuate-cylindrical, lid large, tumid, 

 conical, obtuse. Perist. int. processes usually entire, 

 ciliola more or less perfect, rarely absent. 



128. Hypnum, Bill. PI. of diverse habit, low or 

 erect, with or without radicles. Br. irregular or 

 pinnate. L. patent or squarrose, often falcato-secund, 

 nerveless, or singly or doubly nerved, shining or sub- 

 soariose, cells narrowly linear or vermicular, at angles 

 generally dilated, excavate. Caps, on a smooth seta, 

 curved, cernuous, lid convexo-conical, mamillate, rarely 

 rostrate. Perist. perfect. 



129. Hylocomium, 8chp. St. woody, pinnate or 

 bipinnate, or sparingly branched. L. scariose, shining, 

 sulcate, thinly two-nerved, without radicles, cells 

 narrow, linear, broader at base. Caps, ovate or ovate- 

 globose, coriaceous, lid mammillate. Perist. large, 

 perfect. 



