132 



BOTANICAL GAZETTE 



[august 



FEMALE GAMETOPHYTE AND ARCHEGOXIA 



material 



female erame 



The structure of the adult 



a me 



manner. Usually the radial arrangement of the 

 nt (fig, 48) J and in nearly all cases there is a median 



w 



h 

 % 



. ^^ 



^_ 



\ 



^ 



^*^ 



^1 ■ 



- ^^TK-?- . NMm a ^vV-Hr^^^Jt P-i^^4^^*t^,l^*^-^ 



Fig. 10. — Cross-section of stem. 



■ 



line formed by the abutting tissues {fig. jo) ; in some cases this median 

 cleft extends to the micropylar end of the gametophyte. On the sur- 

 face of the gametophyte the tissue often produces lobes, between 

 which there may be conspicuous seams of more or less completely 

 united tissues running well into the interior of the gametophyte (fig. 

 50). It seems probable that these lobes continue to grow outward 

 after the main body of the gametophyte is well formed. The cells of 

 the gametophyte are well filled w^ith starch. The entire structure 



I 



