﻿BOTANICAL GAZETTE 



this difference would 

 here, whereas their 



The gametophytes 

 so far found have had 

 attached sporophytes, 

 either well developed 



; for the finding of any prothallia 

 in the Gary area has not been noted. 



or very young. With 

 more time at one's 

 disposal, there is little 

 doubt that younger 

 prothallia could be 



dently, from the age 

 of the sporophyte, the 

 gametophytes remain 

 attached for some 

 seasons after fertiliza- 



re!. 



There remains to be 

 done the mechanical 

 labor of sorting until 

 younger and younger 

 material is obtained. g ; c 



The appearance of 

 prothallia is entirely similar to that described by Bruchmann. 

 Most of them are simple (figs, i and 2), although branching 



