262 Proceedings of Indiana Academy of Science 



fixed in one per cent chromo-acetic acid and later sectioned for class 

 use. Whole buds were used for the sectioning, the sections being lon- 

 gitudinal and 15 jx in thickness. Modified triple was used for staining the 

 sections. 



Fiir. 1. Longitudinal section of bud of PorcUa showing unusual lU'vcloiimcnt of 

 sporoiicnous tissue. x AT^. A, sporansium ; W, sporangium wall ; S, stalk of 

 sporophyte ; F, foot of siioioi)hyte. 



On examining the slides, one was noticed which was different from 

 the others. The gametophyte tissue suriounding the young sporophyte 

 was apparently normal, but the sporogenous tissue had grown so vigor- 

 ously that it occupied nearly the whole of the sporophyte. The cells 

 of the foot, stalk and sporangium wall were shrunken and crowded out 

 of place — the spores and elaters occupying most of the foot and stalk as 

 well as the sporangium (fig. 1). 



