62 HOW TO KNOW THE MOSSES 



Stems bipinnately or tripinnately branched .... 57. 

 Steins irregularly branched .... 59, 71. 

 Leaves when moist easily seen. (It is necessary only to see 

 if the leaves are straight or curved, the entire out- 

 line need not show.) 

 Stems pinnately branched. 



Leaves straight 57, 58, 64, 71, 74. 



Leaves curved .... 62, 70, 71. 

 Stems irregularly branched. 

 Leaves apparently on two opposite sides of the 

 stem.^ 

 Leaves straight .... 72, 73, 80. 

 Leaves curved .... 71. 

 Leaves turned to one side, curved .... 44, 62, 71. 

 Leaves arranged equally around stem, straight. 

 Leaves wide-spreading .... 59, 61, 64, 73, 78. 

 Leaves not wide-spreading . . . . 44, 58, 61, 71, 76. 



b. Capsule short-cylindrical (less than four times longer 

 than broad) 



Leaves when moist not easily seen (too small or too 

 closely folded to show if they are straight or curved). 

 Stems pinnately or irregularly branched ... 71, 79. 

 Stems bipinnately or tripinnately branched .... 68. 

 Leaves when moist easily seen. (It is necessary only to 

 see if the leaves are straight or curved, the entire 

 outline need not show.) 

 Stems pinnately branched. 



Leaves straight .... 66, 67, 68, 69, 71. 

 Leaves curved .... 62, 66, 71. 

 Stems bipinnately or tripinnately branched; leaves 

 straight .... 68. 



* If No. 31 has been mistaken for a pleurocarpous moss, it will apparently 

 belong here. 



