IOWA DISCOMYCETES 55 



lected and distributed the second time. Examination of the 

 foreign material shows it to be identical in every way with that 

 ■collected in Iowa. 



OEDER II. PEZIZIXE.^. 



Receptacle well developed, fleshy or more or less leathery, gen- 

 •erally regular, at first closed, spherical (except in Pyronemaceae) 

 gradually opening, becoming shallow, cup-shaped or beaker- 

 shaped or disc-like ; hymenium forming a covering on the upper, 

 inner surface, composed of asci and paraphyses arranged in the 

 form of a palisade. 



FAMILY .4. PYEOXEMACE.E. 



Receptacle seated on a mass of thread-like hypha? ; hymenium 

 -at length plane or convex; peridium wanting or poorly devel- 

 oped. 



PYROXEMA Carus. Nov. Act. Acad. Xat. Cur. 17 : 370. 1835. 



Receptacle seated on a mass of hypha^. fleshy, at first spherical, 

 then expanded ; peridium very poorly developed or wanting ; 

 •spores elliptical, hyaline. 



KEY TO THE SPECIES. 



Plants very small scarcely more than 1 mm. in diame- 

 ter, pale P. omphalodes. 



Plants 1 to 3 mm. in diameter, dark red P. meJaloma. 



Pyroxema omphalodes (Bull.) Fuckel. Symb. Myc. 319. 1869. 

 Plate 7, f. I. 



Peziza omphalodes Bull., Champ. France 264. 1809. 

 Aleuria omphalodes Gill., Discom. 48. 1888. 

 Pyronema confuens TuL, Carp. 2 : 197. 1865. 



Plants fleshy, gregarious or confluent 1 mm. in diameter, 

 forming confluent masses 1 to several cm. in diameter; pale red 

 to salmon-color, surrounding mycelium white ; h^^llenium plane 

 or convex ; asci cylindrical, 8-spored ; spores elliptical. 10 to 12 

 by 7yu; 2 to 3 guttulate and granular within; parapln'ses en- 

 larged upwards and filled with coloring matter. 



