IOWA DISCOMYCETES 



Upper surface of pileus spirally folded or convo- 

 lute Gyromitra. 



Pileus membranaceous, bell-shaped or ragged, attached 



to the stem by the central part only. . . . Helvella. 



3. Rhizixace.e. 

 Spores globose, root-like processes wanting. . . Sph^erosoma 



4. Pyronemack.k. 



Receptacle seated on a spider-webdike, or feltdike mass 

 of hyphae, hypothecium well developed, fleshy; 

 peridium poorly developed Pyroxema 



5. Pezizace.e. 



Spores globose. 



Receptacle externally clothed with bristly hairs. Sph^erospora. 



Receptacle externally smooth or nearly so, not 

 bristly. 

 Receptacle large, cup-shaped, brown. . . Detonia. 

 Receptacle small, nearly plane or disc-shaped. BARL.EA. 



Spores elliptical, blunt, rarely pointed. 

 Receptacle externally hairy. 



At first buried in the ground, margin splitting. Sarcosph^era. 

 Not buried in the ground, margin remaining 



even Lachnea. 



Receptacle smooth or nearly so externally. 

 Cups or discs regular in outline. 

 Juice colorless. 



Spores smooth or rough, not reticulate. 

 Plants entirely sessile. 



Large cup-shaped Peziza. 



Small disc-shaped. 



Plants bright colored, spores hyaline. Humaria. 

 Plants dark colored, spores brown. Ph^eopezia. 

 Plants stipitate. 

 Stem stout, short. 



Stem even, not grooved. . . . Geopyxis. 

 Stem uneven, with longitudinal 



grooves Acetabula. 



Stem long, slender Macropodia. 



Spores reticulate, with a net work, exter- 

 nally Aleukia. 



Juice milky Galactinia. 



Cups irregular, split on one side. . . . Otidea. 



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