46 HOW TO KNOW THE MOSSES 



Stems more than one-half inch long. 

 Leaves hair-like throughout. 



Capsule erect .... 6, 8, 38. 



Capsule not erect .... 4, 6, 7, 8, 26. 

 Leaves broader, sometimes ending in a hair-like tip. 



Capsule erect .... 8, 38, 41. 



Capsule not erect .... 8, 27, 28, 41. 



b. Leaves short and broad (less than four times longer 

 than broadest part) 



Stems one-half inch long or less; capsule not erect .... 



28, 30. 

 Stems more than one-half inch long; capsule not erect. . . . 



28, 29, 30. 



B 



Fruit on the side of the stem or on a very short lateral 

 branch. Stems prostrate or ascending, rarely erect, usu- 

 ally much branched (with more than two or three 

 branches).-^ Pleurocarpous mosses. 



Note. In many cases the genus can be determined without the aid of the 

 capsule. When in doubt where to place a sterile moss that is somewhat 

 branched, try it under both Division A and Division B. 



Plants growing on the ground 



I. LEAVES WHEN MOIST NOT EASILY SEEN 

 (Leaves too small or too closely folded to show if they are straight or curved) 



Stems pinnately branched; capsule not erect .... 



57, 58, 71- 

 Stems bipinnately or tripinnately branched; capsule not 

 erect .... 57, 68. 



1 For arrangement of branches see "Illustrations of Terms," Plate II. 



