IOWA DISCOMYCETES 71 



The plants of this species resemble in color those of the pre- 

 ceding but are somewhat darker. The species is very distinct 

 however in the general appearance of the plants which form 

 small discs on the surface of the soil. This form has often been 

 met with on naked soil among weeds in sheltered places. The 

 spores are also similar to those of Peziza badia Pers. but there 

 is some difference in the nature of the roughenings. 



HUMARIA (Fries) Sacc, Syll. Fung. 8: 118. 1889. 

 Humaria Fries (as subgenus) Syst. Myc. 2: 42. 1822. 



Plants small, sessile, for the most part bright colored, red or 

 yellow; hymenium plane or convex; asci cylindrical to clavate, 

 4 to 8-spored; spores elliptical to fusiform. 



The genus is distinguished from Peziza by the small size of 

 the plants which grow commonly on moist soil among mosses, 

 on naked soil or occasionally on the dung of animals. Four 

 species are described here but the genus is probably represented 

 in Iowa by many more. 



KEY TO THE SPECIES 



Asci 4-spored S. tetraspora. 



Asci 8-spored. 



Spores fusoid, twice as long as broad. . S. muralis. 



Spores broad-elliptical, about twice as long as broad. 



Plants externally granular, on dung. . H. granulata. 



Plants externally nearly smooth, on damp soil. H. leucoloma. 



*Humaria tetraspora (Fuckel) Sacc, Syll. Fung. 8: 121. 

 1889. 



Plate 13, f. i. 



Ascobolus tetrasporus Fuckel, Hedwigia 5 : 4. 1866. 

 Leucoloma tetraspora Fuckel, Symb. Myc. 317. 1869. 

 Peziza (Humaria) tetraspora Cooke, Grevillea 3 : 73. 1874. 



*Humaria muralis (Quel.) Sacc, Syll. Fung. 8: 127. 1874, 



Plate 13, f. ii. 



Peziza (Humaria) muralis Quel., Grevillea 8 : 116. 1879. 



