56 HOW TO KNOW THE MOSSES 



e. Capsule egg-shaped, pointed 



Leaves absent .... 37. 



Leaves long and narrow (more than four times longer 

 than broadest part) .... 36. 



Plants growing on rocks, bricks, mortar, etc. 



I. CAPSULE ERECT 

 a. Capsule cylindrical 



Shape of leaves when moist not easily seen. (Leaves too 

 small or too closely folded to show if they are rela- 

 tively long and narrow or short and broad) .... 



2, 22, 23. 

 Shape of leaves when moist easily seen. (Leaves must be 

 seen well enough to estimate their relative shape.) 

 Leaves long and narrow (more than four times longer 

 than broadest part). 

 Leaves hair-like throughout .... 3, 5, 6, 8, 14. 

 Leaves broader, sometimes ending in a hair-like tip 



8, 13, 22, 23,41. 



Leaves short and broad (less than four times longer than 

 broadest part) .... 10, 15, 17, 18. 



h. Capsule angular {Jour- to six-sided) 



Leaves long and narrow (more than four times longer 

 than broadest part) . . . .41. 



c. Capsule elliptical, oval, or pear-shaped 



Shape of leaves when moist not easily seen,^ (Leaves too 

 small or too closely folded to show if they are rela- 

 tively long and narrow or short and broad.) 



1 See Andreaea, p. 75- 



