IOWA DISCOMYCETES 97 



was found to be quite common in the early spring so that suf- 

 ficient material was collected to be issued in exsiccati. Nearly 

 a year later the material was sent to Dr. Rehni of Germany for 

 determination who described it as new. 



DASYSCYPHA (, Fries) Fuckel. Symb. :\Iyc. 304. 1S69. 



Dasyscypha (as tribe) Fries. Syst. Myc. 2 : 89. 1822. 



Cups gregarious, small, distinctly stipitate. expanded, when 

 dry closed, externally clothed with hairs : hymenium concave : 

 asci elongated, 8-spored ; spores variable in form, simple, hyaline. 



Distinguished from Trichopeziza by the stipitate cups. 



Two species collected in Iowa. 



KEY TO THE SPECIES. 



Plants small 1 to 2 mm. in diameter, white. . . . D. nivea. 

 Plants comparativelv large 2 to 5 mm., yellowish. . . D. pygmcea. 



Dasyscypha xr-ea (Hedw.) Sacc. Syll. Fung. 8: 437. 1889. 

 Plate 25, f . iii. 



Octospora nivea Hedw. Obs. Bot. 13. 1802. 

 Peziza nivea Fries, Syst, Myc. 2: 90. 1822. 

 LachneUa nivea Phill.. Brit. Discom. 245. 1887. 



Plants small about 1 mm. in diameter, tapering below into a 

 distinct stem which is sometimes very short or 1 to 2 mm. long^ 

 clothed externally with a dense covering of hyaline (white) 

 hairs; hairs enlarged, clavate smooth or minutely roughened; 

 hymenium concave or nearly plane: asci clavate, 8-spored; spores 

 small, simple, hyaline, 7 to 9 by 2;u; paraphyses present. 



On decaying wood and herbaceous stems, Iowa City and ^It. 

 Pleasant, common. 



In the specimens from which the description is drawn the 

 hairs are decidedly enlarged upwards so as to appear club- 

 shaped and nearly smooth or a little roughened. 



Dasyscypha pygm.ea (Fries^ Sacc, Syll. Fung. S: 436. 1889. 

 Plate 24, f. in. 



Peziza pygmea Fries. Syst. Myc. 2 : 79. 1822. 

 Helotiiim pygmmitn Karst.. ^lyc. Fenn. 1: 153. 1871. 



