42 Proceedings of the Ohio State Academy of Science 



KEY TO GENERA. 



a — Mycelium superficial Arachnopeziza 



a — Mycelium within substratum. 



b — ■ Apothecia springing from sclerotia. 



c — Apothecia large Sclerotinia 



c — Apothecia small 



b — Apothecia not from sclerotia. 

 c — Externally hairy. 



d — ■ Apothecia large, bright-colored, hairs inconspicu- 

 ous, appressed Sarcoscypha 



d — Apothecia small, pale. 



e — Apothecia sessile or subsessile Lachnella 



e — Apothecia stipitate Dasyscypha 



c — ■ Externally smooth. 



d — Cartilaginous or gelatinous. 



e — ■ Spores simple Ombrophila 



e — Spores several celled Coryne 



d — Waxy. 



e — ■ Stipe slender Phialea 



e — Stipe none or thick Helotium 



Genus I. Helotium Pers. Syn. Fung. 677. 1801. 

 Type species, Leotia acicularis Pers. 



Mycelium within the substratum. Apothecia waxy, often 

 thick, sessile or with a short thick stipe, externally smooth or 

 sometimes pruinose, often plane from the first, usually bright 

 colored and small. Paraphyses slender, filiform. Asci cylin- 

 drical or cylindrico-clavate, hyaline. Spores 8, elliptic, fusiform, 

 ovoid or oblong, blunt or sharp pointed, hyaline, guttulate, 

 pseudo-septate, 2-4 celled. 



Growing on old wood or herbaceous stems. 



KEY TO SPECIES. 



a — Interior of the cup bright yellow citrinum 



a — Interior of the cup pale yellow. 



b — Growing on wood pallescens 



b — Growing on stems herbarum 



-\-Helotium herbarum (Pers.) Fr. Sum. Veg. Scand. 356. 1846. 

 Peziza herbarum Pers. Syn. Fung. 1 : 664. 1801. 

 Apothecia sessile, pale yellow, 1-3 mm. broad. Hymenium, 



