V. 



MOSSES (MUSCI): SPHAGNALES—ANDREAIALES 175 



stage is composed of a long stalk composed of several rows of 

 cells, usually four, and a terminal cell which later gives rise to 



A 



Fig. 91. — A, Male catkin of Sphagnum cymbifolium, X50; B, young antheridium of 

 S. acutifolium, X350; C, opened antheridium of the same species; D, spermatozoid, 

 Xiooo (about); E, female branch with sporogonium of S. acutifolium, slightly 

 magnified; cal, calyptra. A, C, E, after Schimper; B, after Leitgeb. 



the body of the antheridium. The first divisions in the body 

 of the antheridium only take place after the stalk has become 



