Proceedings of the Ohio State Academy of Science 27 



Common on old stumps, twigs, board fences, etc. Early 

 ■spring to late autumn. 



Coll. Freda M. Bachman, Oct. 31, 1907. Bruce Fink, May 

 1, 1908. W. G. Stover, June 27; 1908. Freda M. Bachman, 

 Aug. 5, 1908. 



Order II. Pezizales. 



Vegetative portion within the substratum, or superficial ; 

 saprophytic, rarely parasitic; apothecia plane, concave or con- 

 vex, sessile or stipitate, fleshy, waxy, leathery or gelatinous, free 

 or borne upon a stroma. Hymenium exposed from the first or 

 at least very early ; hypothecium well developed, exciple well 

 developed or wanting. 



KEY TO FAMILIES. 



a — Exciple well developed, leathery 



b — Apothecia minute, dark, free from the first Patellariaceae 



b — Apothecia large, erumpent Cenangiaceae 



a — Exciple none or well developed but never leathery 



b — Exciple when present and hypothecium of similar structure 



c — Exciple developed, fleshy Pezizaceae 



c — Exciple wanting or poorly developed 



d — Asci emergent Ascobolaceae 



d — Asci not emergent Pyronemaceae 



b — Exciple and hypothecium of different structure 



c — Exciple of elongated, light colored usually thin-walled 



cells Helotiaceae 



c — Exciple of roundish, dark, thick-walled cells Mollisiaceae 



Family I. Pezizaceae. 



Mycelium mostly within the substratum ; usually saprophy- 

 tic ; Apothecia fleshy, superficial or somewhat immersed in the 

 substratum, sessile or stipitate, exterior smooth, scaly, warty or 

 hairy. Hypothecium and exciple of similar structure and either 

 prosenchymatous or pseudo-parenchymatous. 



KEY TO GENERA. 



a — Externally hairy Lachnea 



a — Externally smooth, scaly, or warty Peziza 



