Helvellaceee 



VERPA. Page 539. 

 Pileus drooping, regular, margin entire, thimble-shaped. 



LEOTIA. Page 540. 

 Pileus fleshy, discoid. 



** Pileus adnate throughout to the stem. 



MORCHELLA. Page 541. 



Surface of pileus furnished with stout, anastomosing ribs bounding 

 deep irregular pits. 



GYROMITRA. Page 546. 

 Surface of pileus covered with rounded, variously contorted folds. 



MlTRULA. Page 548. 

 Pileus subglobose or clavate, surface even. 



SPATHULARIA. Page 549. 



Pileus flattened, running down the stem for some distance on op- 

 posite sides. 



GEOGLOSSUM. Page 550. 



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