of Bartramia; the vcnlricosc of Wcbera. 

 Then, the position is of importance, too. 

 Some are quite erect; others sub-erect; a^ain 

 others are horizontal; others incHncd to 

 quite pendulous. Some may be f|uite ex- 

 sertedheyond the gametophyte, while of hers 

 may be quite immersed in the leafy portion, 

 as in Neckera. 



5. Hold the leaf up to the light and with 

 a hand lens determine if a costa be present 

 or not. If present, note the distance which 

 it occupies with regard to length and 

 breadth of leaf and note, too, if it is pro- 

 longed beyond the apex, that is, is it excur- 

 rent? Leaves without costa are said to be 

 ecostate. 



6. The margin is next to be examined. 

 Is it toothed, that is serrate, or entire? 

 Sometimes, mosses are slightly serrate at 

 apex and entire for the remainder of the 

 leaf. 



7. Note the apex of the leaf. Most 

 mosses will conform to one of two classes, 

 that is, the acute or acuminate apex. These 

 often grade into each other. Sometimes an 

 obtuse apex is found or one quite rounded 

 as in Calliergon. 



After "running down" to this point turn 

 to the description of the genus which you 

 suspect your specimen to be. This descrip- 

 tion will be found in the second part of the 

 work and arranged in alphabetical order. 



The mosses described are the common 

 mosses of the local flora range. That the 

 list is limited is due to the fact that only 

 macroscopic characters are noted. This 

 work has not attempted anything more 

 than the simplest presentation. Technical 

 terms have been avoided as much as>pos- 



FiG. 4. Male plant, with 



rosette of leaves at 



the summit. 



