26 Brown: Apogamy in Phegopteris polypodioides 



irregular-shaped old prothallium whose basal portion had died. 

 The apex of this prothallium was strongly indented, the sinus 

 being situated slightly to one side of the middle. From one 



Figs. 7-1 i 

 side of the prothallium a very much branched proliferation 

 developed, while from the cellular mass outgrowths resembling 

 somewhat the normal leaves of young sporophytes were formed. 



