CLASSIFICATION AND NOMENCLATURE 



I have made as few changes in nomenclature as is consistent 

 with clearness and a moderate interpretation of the necessities 

 of the situation. The principle of priority has been allowed 

 great weight, but usage also has its claims and a name long in 

 common use has not been discarded unless convenience and 

 clearness seemed to demand it. 



The following is a synopsis of the system of classification fol- 

 lowed : 



CLASS MUSCI 



ORDER I. SPHAQNALES 

 Family I. Sphagnaceae. 



ORDER III. 

 Suborder I. Nematodonteae 



Family 3. 

 Family 4. 

 Family 5. 



Suborder 



Group i. Ap 



Family 6 

 Family 7 

 Family 8 

 Family 9 

 Family 10 

 Family 11 

 Family 12 



Georgiaceae. 



Polytrichaceae. 



Buxbaumiaceae. 



II. Arthrodonteae 



OLEPIDE^E 



Archidiaceae. 



Dicranaceae. 



Leucobryaceae. 



Fissidentaceae. 



Grimmiaceae. 



Tortulaceae. 



Encalyptaceae. 



ORDER II. ANDREA.EALES 



Family 2. Andraaeaceae. 

 BRYALES 



Group 2. Diplolepide^e 

 Subgroup Acrocarpae — 



Family 13. Orthotrichaceae. 

 Splachnaceae. 

 Funariaceae. 



Family 14. 

 Family 15. 

 Family 16. 

 Family 17. 

 Family 18. 

 Family 19. 

 Family 20. 



Meesiaceae. 



Timmiaceae. 



Aulacomniaceae. 



Bartramiaceae. 



Bryaceae. 



Subgroup Pleurocarpae — 



Family 21. Leskeaceae 



Family 22. 



Family 23. 



Family 24. 



Family 25. 



Family 26. 



Hypnaceae. 



Fabroniaceae. 



Neckeraceae. 



Leucodontaceae. 



Fontinalaceae. 



Key to the Families of Mosses 



1 — Plants whitish or light gray, scarcely appearing green 2 



Plants green, yellow-green, or dark green to almost black 3 



2 — Plants of bogs; leaves with large colorless cells surrounded by nar- 

 row green cells; capsules nearly globular, ovoid when dry and 

 empty, without peristome Sphagnaceae 



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