BRITISH MOSSES. 



11 



chlorophyll. This is the green stuff so often seen in 

 flower-pots which have been allowed to get too damp. 

 At points in the primary hypha cells begin to divide in a 

 new fashion not by transverse septa as 



a, 



before, but by septa differently inclined, so 

 as to produce the rudiments of leaves ; and 

 the direction of growth changes from hori- 

 zontal to vertical. Thus is formed ( 3) the 

 bud, which by growth gives rise to (4) the 

 Moss plant. 



This course of development is illustrated by Figs. 5 

 and 6. Fig. 5 shows at a the remains of the cell which 

 has burst in emitting the hypha, or cellular projection to 

 the right. Fig. 6 shows the same plant further advanced 



FIG. 5. Spore 

 with young 

 Protonema. 



After Schimper. 



Fra. 6. Protonema with, a a, young Moss 

 Plants forming on it; r, Rhizoids or Rootlets. 

 After Schimper. 



