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. Rehm of Germany for 

 determination who described it as new. 



DASYSCYPHA (Fries) Fuckel, Symb. Myc. 304. 1869. 



Dasijscypha (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 comparatively large 2 to 5 mm., yellowish. . . J), pygmcea. 



Dasyscypha nivea (Hedw.) Sacc, Syll. Fung. 8: 437. 1889. 



Plate 25, f . m. 



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

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

 LaehneUa 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/x- paraphyses present, 



On decaying wood and herbaceous stems, Iowa City and Mt. 

 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 pygmcea (Fries) Sacc, Syll. Fung. 8: 436. 1889. 



Plate 24, f . m. 



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

 Helotium pygmceum Karst., Myc. Fenn. 1: 153. 1871. 



