Edgerton: Trochila populorum Desm. 173 



It is possible that Potebnia is correct when he beheves that this 



fungus should be placed in the genus Pseudopeziza, but, with the 



present classification, the dark outer layer of cells of the apothecia 



would cause it to remain in the genus Trochila. 



Louisiana Agricultural Experiment Station, 

 Baton Rouge, La. 



