Mosses with a hand-lens vn 



ii. Leaves two- ranked ; plants appearing flattened, 



Fissidens. 



Leaves not two ranked, arising from all sides of the 

 stem, 12. 



12. Capsules smooth when dry, 13- 



Capsules furrowed or wrinkled when dry, . . 14. 



13. Capsules with a long slender neck, . . Trematodon. 

 Capsules with neck short or wanting, .... 



Bryum, Dicranum, Pogonatum alpinum. 



14. Capsules subglobose when wet, . Philonotis and Bartramia. 

 Capsules elongated, often subcylindric, . . . . 15- 



15. Growing on rotten wood, Dicranum. 



Growing on earth or bases of trees 16. 



16. Growing in swamps or very wet places, . Gymnocybe. 

 Growing in barren places, roadsides, paths, etc. , . 



Ceratodon, Funaria, and Ditrichum. 



Growing in woods on soil, base of trees, or rocks, 



Dicranella. 



B 



1. Growing on stones in running water, .... 



Rhynchostegium, Fontinalis, Hypnum, Brachythecium. 

 Not growing in running water, 2. 



2. Leaves apparently two- ranked; plants appearing flat- 



tened, 3- 



Leaves not two-ranked 4- 



3. Growing on decayed wood, 



. Plagiothecium, Raphidostegium, Entodon. 



Growing on trees Neckera. 



Growing on stones or soil in moist shady places, 



Plagiothecium, Fissidens. 



4. Plants regularly once or twice pinnate, looking like 



miniature ferns, 



. Thuidium, Hypnum, Hylocomium proliferum. 



Plants not regularly pinnate, 5- 



5. Capsules erect, straight, 6. 



Capsules cernuous, curved, 11. 



6. Growing on bark of trees 7- 



Growing on soil or decayed wood 10. 



7. Growing only near the base of trees, 8. 



Growing at various heights on tree trunks, seldom near 



the base, 9- 



8. Light green; branches julaceous, .... Thelia. 

 Dark green; branches somewhat flattened or at least 



not julaceous, . . . .... Anomodon. 



9. Small ; seta many times as long as the perichuetial leaves, 



Pylaisiella. 



Larger ; seta not more than twice as long as the peri- 

 chaetial leaves, Leucodon. 



