256 NATURAL HISTORY BULLETIN. 



with deep grooves; asci cylindrical; sporidia 8, elliptical, 15 

 to 18 by 10 to 12, paraphyses filiform, slender. 



Habitat — On the ground in woods; Iowa City. 



Plants are from 2 to 3 inches in height and the pileus from 1 

 to 2 inches in diameter. Margin of pileus is entirely free from 

 the stem and the whole plant is of a very light color being 

 almost white. The color and the pileus which is entirely free 

 and expanded distinguishes this species from Helvetia lacu- 

 nosa. Plants are found in the spring in woods near Iowa City. 



Helvella elastica Bull. 

 Plate III, fig. it. 



1793 Helvella elastica Bulliard, Champ. , p. 262. 



1823 Helvella elastica Fries, Syst. Myc. , II, p. 21. 



1860 Helvella elastica Berkeley, Outl. of Brit. Fung. , p. 359. 



1871 Helvella elastica Cooke, Handbk. of Brit. Fung., p. 659. 



1887 Helvella elastica Phillips, Brit. Disc, p. 15. 



1889 Helvella elastica Saccardo, Sylloge Fung., VIII, p. 24. 



1896 Helvella elastica Underwood, Minn. Bot. Studies, p. 490. 



1897 Helvella elastica Engler-Prantl, Pfian. Famil. , I, i, p. 171, fig. 114. 



Pileus free, even, inflated, at length acutely lobed; stem 

 elongated, slender attenuated upwards, pruinose; asci cylin- 

 drical; sporidia 8, elliptic, 18 to 20 by 10 to 12 microns; 

 paraphyses filiform, slightly enlarged above. 



Habitat — On the ground in woods; spring; Iowa City. 



Distinguished by the long slender stem and free pileus 

 which is lobed often being very regular in outline, but some- 

 times more or less irregular. Margin of pileus is often 

 slightly incurved. Plants are of a very light yellowish color 

 and from 1 to 2 inches in height and .5 to 1 inch broad. 



Order II— PEZIZINE^. 



Receptacle well developed, fleshy or more or less leathery 

 generally regular. At first closed spherical (except Pyroiie- 

 7nacece) gradually opening becoming shallow cup-shaped or 

 beaker-shaped. Hymenium forming a covering on the upper, 

 inner surface, composed of asci and paraphyses arranged in 

 the form of a palisade. 



