28 Proceedings of the Ohio State Academy of Science 



Genus. I. Peziza (Dill.) L. Gen. PI. 493. 1754. 

 Type species, Peziza acetabulum L. 



Mycelium visible only near the base if at all. Apothecia 

 fleshy, sessile or shortly stiptitate, varying much in size, smooth, 

 warty or pruinose, never hairy, variously colored, plane, con- 

 cave, or convex. Paraphyses simple or branched, colored or 

 hyaline, filamentous or clavate. Asci cylindrical. Spores 8, 

 large, smooth or rough, usually hyaline, elliptic, oblong-elliptic or 

 spherical. Growing on earth or decayed wood. 



A very large genus. The subgenera often used as genera. 



KEY TO SUBGENERA. 



a — Apothecia stipitate Geopyxis- 



a — Apothecia not stipitate 



b — Apothecia small, usually bright colored Humaria 



b — ■ Apothecia large 



c — Exterior warty Pustularia 



c — Exterior scaly or smooth 



d — ■ Asci becoming very blue with iodine Plicaria 



d — Asci slightly blue with iodine Discina 



Subgenus I. Discina. 



Apothecia solitary, at first bell-shaped, closed, finally plane,, 

 fleshy, edge of the cup wavy and often torn, base often nar- 

 rowed into a very short thick stipe, exterior smooth. Para- 

 physes branched at the base, septate, more or less clavate, col- 

 ored. Asci cylindrical. Spores elliptical, simple, hyaline, often 

 containing a single large oil globule, sometimes 2 oil globules. 



KEY TO SPECIES. 



a — Interior of the cup covered with large veins venosa 



a — Interior of the cup having shallow grooves reticulata 



Pesiza reticulata. Grev. Crypt. Fl. 3: 156. 1825. 



Apothecia solitary or caespitose, 5-14 cm. broad, edge more 

 or less incised, somewhat repand, interior rugose near the cen- 

 ter, light brown becoming quite dark brown when older, exterior 



