138 HANDBOOK OF BRITISH MOSSES. 



P. atrovirens, Br. fy Schimp.; stem prostrate, much 

 branched, pinnato-ramulose ; branches suberect; leaves im- 

 bricated, secund, ovato-lanceolate, attenuated, slightly toothed; 

 margin recurved; nerve reaching nearly to the tip, spo- 

 rangium oblong, cernuous; lid conical. — Hook, fy Wils. t. xxvi.; 

 Eng. Bot. t. 2422.; [Moug. # Nest. n. 521.) 



Alpine rocks and roots of trees. Scotland. Bearing fruit 

 in spring. 



Dioicous; forming dark-green depressed tufts. Stem 

 branched ; branches pinnate ; branchlets mostly erect, in- 

 curved; leaves dark, brown-green, more or less secund, 

 crowded, subpapillose, ovato-lanceolate, acuminate, slightly 

 serrated or entire ; nerve strong, reaching almost to the apex ; 

 cells roundish or subquadrate with thick walls; margin re- 

 curved; paraphylla numerous, multiform, often reduced to 

 mere threads; fruitstalk \ an inch high, even; sporangium 

 short, oblong, slightly curved, cernuous ; cilia often abortive ; 

 lid conical. 



Leaves very different from those of Hypnum, and more re- 

 sembling those of Leptodon. 



2. P. catemilata, Br. §• Schimp. ; stem creeping ; branches 

 subpinnate; branchlets erect, filiform; leaves minute, imbri- 

 cated, ovate, acute, entire; nerve reaching halfway; margin 

 recurved at the base ; sporangium oblong, curved, subcernuous ; 

 lid rostrate.— Hook. §■ Wils. t. lv.; {Moug. fy Nest. n. 1220.) 



On alpine and subalpine rocks. Scotland and Yorkshire. 

 Bearing fruit in summer. 



Dioicous; forming intricate brownish-green tufts. Stems 

 thread-shaped, creeping, branched ; branches subpinnate, sub- 

 erect, often slightly curved; leaves minute, spreading when 

 moist, closely imbricated when dry, papillose, ovate, acute, 

 entire ; margin strongly reflected below ; nerve strong, reach-' 



