viii MOSSES WITH A hand-lens 



io. Tree-like, growing on the ground in swamps, . Climacium. 

 Prostrate in mats on soil and decayed wood, . 



. Brachythecium acuminatum, Entodon. 

 ii. Operculum with a very long beak, .... 



Operculum without beak, . Cirriphyllum, Eurhynchium. 

 ... . . Hylocomium, Hypnum, Brachythecium. 



KEY NO. 2 



Based Mainly on Habitat 



Mosses growing on the bark of living trees A. 



Mosses growing on rotten wood, B. 



Mosses growing on stones but not in water, . . . . C. 



Mosses growing on stones in water, D. 



Mosses growing on soil, E. 



Mosses growing on decaying animal tissue or excreta, . 



Splachnum. 



Mosses growing in swamps and bogs, greenish-white, . 



■ ... Peat Mosses, 



Seta many times longer than the perichsetial leaves, . 3. 

 Seta shorter than the penchsetial leaves, or at most not 



more than twice as long 2. 



Acrocarpous; capsules wrinkled or puckered about the 



mouth Weissia. 



Pleurocarpous ; capsules smooth, . Leucodon, Neckera. 



Blackish-green, Drummondia. 



Dark to light green, 4- 



Capsules cernuous or curved; plants pinnate, . Thuidium. 



Capsules erect, straight, 5- 



Dark green, growing only around the base of trees, 



Anomodon. 



Light green, usually growing near the base of trees, . 



Thelia. 



Dark to yellotoish-green, usually growing higher up on 



trees, Pylaisiella. 



B 



Capsules erect, cylindric and nearly symmetric, . . 2. 

 Capsules curved, horizontal or pendent, . . . •. 4- 

 Pleurocarpous, Brachythecium acuminatum, Entodon. 



Acrocarpous, 3- 



Peristome of four large teeth Georgia. 



Peristome of numerous smaller teeth 



Dicranum flagellars 



Capsules ovoid to subglobose, horizontal to pendent, 



Mnium. 



Capsules subcylindric, arcuate, .5- 



