HEIyVELLA. 189 



Leotia. — Pileate, margin revolute. 

 GeogIvOSSU m . — Clavate . 

 Peziza. — Cup-shaped, soon open. 

 Helotium. — Cup-shaped, disc always open. 

 Bulgaria. — Disc orbicular, glutinous within. 



Genus I. MORCHBI<I/A. Dill. 

 Receptacle pileate, hymenium in folds and pits. 



M. esculenta. 



Pileus, round, obtuse, adnata at the base, two to three 

 inches high, one-half inch thick, yellowish. 



Prof. Peck gives three or four species of Morchella, which he considers 

 as edible. 



This is one of the best of fungi to use for food and is easily identified. 

 Our Pennsylvania farmers know them as merkel, and search for them 

 for a good meal in the form of a potpie. 



Genus II. HElyVBI<IyA. 



Receptacle pileate, hanging down over the stem ; concave 

 and barren below ; hymenium even. — Berkeley Outlines. 



H. crispa. 



Pileus, deflexed, lobed, free, crisped, yellowish. 



Stem, costato-lacunose. 



Asci, clavate, sporidia ovate. 



This is scarce in the Valley. Found specimens near AUentown in an 

 open woods. 



H. elastica. 



Pileus, free, inflated, acutely lobed. 

 Stem, elongated. 

 Not very common. 



