VI. 



THE BRYALES 



215 



FIG. 115. A, Longitudinal section of the young sporogonium of Pleuridium subulatum, 

 X8o; B, part of the same, X6oo; sp, archesporium; C, young embryo of Phascum 

 cuspidatum, optical section, Xi75; D, cross-section of an older embryo of the 

 same, X35o; sp, archesporium; E, longitudinal section of the central part of the 

 young sporogonium of Ephemerum phascoides, X35; sp, archesporium. C, D, 

 after Kienitz-Gerloff ; E, after Muller. 



