124 



PLANT STKUCTUKES 



called a jjseudopodium, or ''false stalk," andjivilie top of 

 it is imbedded the foot of the sporogormH^Tcarrying the 

 globular capsule (Fig. 105, C). / 



74. True Mosses. — This immense and most highly organ- 

 ized Bryophyte group contains the great majority of the 

 Mosses, which are sometimes called the Brijum forms, to 

 distinguish them from the Si^lmgnum forms. They are 



Fig. 106. Different stages in the development of the leafy gametophore from the pro- 

 tonema of a common moss {Funaria): A, the first few cells and a rhizoid {r)\ B, 

 C, later stages, showing apical cell (I) and yonng leaves' (i?); D, later stage much 

 less magnified, showing protonemal filaments and the young gametophore {gam) 

 —After Campbell. 



the representative Bryophytes, the only group vying with 

 them being the leafy Liverworts, or Jungprmannia ioi'va^. 

 They grow in all conditions of moisture, from actual sub- 

 mergence in water to dry rocks, and they also form exten- 

 sive peat deposits in bogs. 



The thallus body of the gametophyte is made up of 

 branching filaments (Figs. 81, 102), those exposed to the 



