30 INTRODUCTION TO THE STUDY OF FUNGI 



them from darkness into light, as was seen to be the first 

 function of the long - stemmed carpophores. Everything 

 indicates in the Pyrenomycetes that there is some necessity 

 for exposing the fructifying surface to the light ; whether on 

 carpophores or effused in a stroma, only one stratum of 

 perithecia is the rule, a double series the very rare exception. 



