86 MINNESOTA BOTANICAL STUDIES.- 



given by Massee (134, p. 379), Rehm (178, p. 1073), and Cooke 

 (48, p. 99), for Pccica radiculata Sow., all agree with the described 

 specimens except in color. When fresh the specimens were entire- 

 ly deep brown or pnrple-brown with no yellow or white tinge. Evi- 

 dently it is very closely related to P. radiculata Sow. Bresadola's 

 figures (35, pi. 184), for P. radiculata agree in form, but not in 

 color. 



7. DISCINA FRIES. 



Cups mainly solitary, fleshy, large, subsessile, cupulate to saucer- 

 shaped, often turned back ; exterior coarsely granular ; spores el- 

 liptical, smooth, hyaline, continuous. 



1. Discina venosa reticulata (Grev.) Rehm, Raben. Krypt. Fl. 1:3; 



9;8. 1896. (Plate XVII. Fig. 2.) 



Pcziza reticulata Grev. Scott. Cryptofl. 3. tab. 156. 1825. 



Discina reticulata Sacc. Syll. Fung. 8: 100. 1889. 



Solitary, nearly sessile or narrowed into a short, stout, lacunose 

 and plicate stipe, fleshy, brittle, first cupulate to saucer-shaped with 

 margin entire, involute, later margin becomes waved, spread out, 

 but retaining tendency to be involute, 1-3 inches in diameter; hy- 

 menium plicate, undulate and unequal with nodules or reticulations, 

 reddish-brown, 1-3 inches across before becoming depressed and 

 flattened ; exterior whitish coarsely granulose to farinose ; base 

 plicate ; spores elliptical, obtuse, hyaline, continuous, granulate, 18- 

 24 X 10-12 mic. ; paraphyses rather stout, clavate, septate, branched, 

 granulate. 



On the ground in oak woods ; Ramsey, May 1903, Harold Cuz- 

 ner. 



Schroeter (195, p. 43), describing the spores of P. reticulata 

 Grev. writes ''An beiden Enden mit schwachen, verschwindenden 

 Plasmabelag ohne eigentliche Anhangsel." This is not noticeable 

 in the Minnesota material. 



Exsiccati : C. Roumeguere, Fungi selecti. 7124: Plates: Grev. 

 Scott. Cryptflo. 3. pi. 156. 1825; Krombholz, Schwamme VIIL pi. 

 61. fig. 15-22. 1843. 



2. Discina venosa (Pers.) Sacc. Syll. Fung. 8: 104. 1889. 

 Peziza z'oiosa Pers. Syn. Fung. 638. 1801. 



Mainly solitary, fleshy, sessile or base slightly contracted into a 

 stem-like base, up to 5 cm. in diameter ; cupulate ; margin entire, 

 curved in, later becoming waved ; hymenium deep rich umber 

 brown, no olive or purple tinge, smooth or sinuous when mature; 



