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. Hachman, Oct. 31, 1907. EJruce Fink, May 

 I, 1908. W. G. Stover, June 27, 1908. Freda M. Bachman, 

 Aug. 5, 1908. 



Order II. Pezizale.s. 



X'egetative 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 Patcllariaceae 



b — Apothecia large, erumpent Cenangiaceae 



a — Exciple none (;r 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 



1) — 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 G EX ERA. 



a — Externally hairy Lachnea 



a — Externally smooth, scaly, or warty Peziza 



