IOWA DISCOMYCETES 93 



always been associated with tlie genus Helotium ratlier than with 

 the one to which it belongs. 



CHLOROSPL.ENIUM ^RUGiNOSUM (Oeder) De Xotaris, Comm. 

 Critt. It. 1: 376. 1864. 



Plate 24. f. i. 



Helvella aeruginosa Oeder. Fl. Dan. pi. 534. 1770. 



Peziza aeruginosa Vahl. Fl. Dan. pi. 1200. 1797. 



Helotium acruginosum Fries. Sununa Veg. Scand. 355. 1849. 



Plants gregarious with a short stem or nearly sessile, concave 

 or nearly plane, bright feruginous-green externally, staining the 

 substratum to some depth the same color; hymenium paler often 

 yellowish; entire plant from 5 to 8 mm. in diameter and the same 

 in height ; stem stout, tapering below ; asci cylindrical to clavate, 

 8-spored ; spores fusiform or f usoid. 10 to 14 by 3 to 4/i, hyaline ; 

 paraphyses slender. 



On old wood especially oak. Iowa City. ^lacbride and Shiraek, 

 Mt. Pleasant, Seaver, not uncommon. 



The plants of the species are distinguished by the bright 

 fpruginous-green color of the exterior of the cups as well as that 

 of the substratum on which they grow. The wood thus stained 

 is made use of in the manufacture of various articles. 



Chlorosplexium versiforme (Pers.) De Xotaris, Comm. Critt. 

 It. 1: 376. 1864. 



Plate 24. f. 11. 



Peziza versiforme Pers.. Ic. Desc. 25. 1798. 



Plants gregarious, stipitate or subsessile. concave or plane, of- 

 ten very irregular in outline, elongated on one side or variously 

 contorted ; externally brownish to olivaceous-green ; hymenium 

 dull olivaceous-green : asci cylindrical. 8-spored : spores elliptical 

 or subelliptical. 12 to 14 by 3 to 4^ : paraphyses filiform, slender. 



On old wood. Decorah. Iowa. E. W. D. Holway. 



The only specimens of this species examined from Iowa are 

 those collected by Holway at Decorah. 



The color in this form is not nearly so bright as in the preced- 

 ing and the plants are much more irregular in form. From the 



