322 



RESEARCHES ON FUNGI 



an operculum tilted at an angle of 45° to the slightly curved 

 ascus axis ; (2) two asci out of the three of Ptychoverpa 



Fig. 160. — A fruit-body of Gyromitra esculenta. The hymenium covering tlie 

 pilaus is much folded. The escape of the spores from the sides and 

 crevices of the folds is doubtless aided, here as in the Morchellaceae, by the 

 heliotropic curvature of the ends of the asci. Photographed in Yorkshire, 

 England, by A. E. Peck. Natural size. 



