IOWA DISCOMYCETES 75 



Acetabula sulcata (Pers.) Fuckel, Symb. Myc. 330. 1869. 



Plate 19, f. ii. 



Peziza sulcata Pers., Syn. Fung. 613. 1801. 



Plants stipitate, about 2 em. in diameter, externally pruinose, 

 light colored, yellowish; hymenium darker, brown; stem 1 to 2 

 cm. long by 5 to 1 cm. thick, with deep grooves which extend 

 as far as the base of the cup; asci cylindrical, 8-spored; spores 

 elliptical, smooth, 18 to 20 by 12^; paraphyses enlarged above. 



On damp ground in woods, Iowa City. 



The species is quite different from the preceding in the ab- 

 sence of veins which extend up the sides of the cup. The stem 

 itself is grooved as in A. acetabulum (L.). 



Only one collection of this species was made but a number of 

 plants -were found. 



MACROPODIA Fuckel, Symb. Myc, 331. 1869. 



Receptacle cup-shaped or expanded, usually borne on a long, 

 slender stem, externally rough with minute hairs or hair-like 

 outgrowths appearing mealy; hymenium darker than the exte- 

 rior of the cup; spores elliptical or fusoid. 



Two species common in woods. 



KEY TO THE SPECIES. 



Plants with long, slender stem; spores subelliptical. M. macropus. 



Plants with short, thick stems; spores fusiform. . . M. fusicarpa. 



Macropodia macropus (Pers.) Fuckel, Symb. Myc, 331. 1869, 



Plate 19, f. i. 



Peziza macropus Pers., Obs. Myc, 1 : 26. 1790. 



Cups hemispherical then expanded, clothed externally with 

 minute hair-like structures, giving the exterior of the cup and 

 stem a pruinose appearance; hymenium brownish; stem long, 

 slender, tapering upwards, even or lacunose, asci cylindrical, 8- 

 spored; spores fusoid, or elliptical, becoming slightly rough at 

 maturity, about 30 by 10 to 12/x; paraphyses enlarged upwards. 



On the ground in woods, Iowa City and Mt. Pleasant. 



The plants of this species are rather common but usually not 



