THE DISCOMYCETES OF EASTERN IOWA. 247 



d — Cup not surrounded with gelatinous layer Zukalina 



d — Cup with gelatinous layer . . Glosopeziza 



A — Spores colored, at last violet or brown. 



b — Spores spherical ..... Boudiera 



b — Spores elliptical, or fusiform. 



c — Spores united in a ball in the ascus . Saccobolus 



c — Spores free in the ascus . . . Ascobolus 



HKLOTlACK.lv 



A — Receptacle between fleshy and waxy or waxy, 

 thick or membranous. 



b — Receptacle fleshy waxy, bright fragile or dull 

 leathery ; not coherent, 

 c — Externally hairy. 



d — Externally tomentose . . . Sarcoscypha 



d — Externally bristly .... Pilocratcra 



c — Externally smooth. 



d — Receptacle not springing from sclerotium. 

 e — Spores at length not stalked. 



f — Substratum green . . . Chlorosplcniuni 



f — Substratum not colored . . Ciboria 



e — Spores, at length, stalked . . Rutstrcemia 



d — Receptacle arising from a sclerotium Sclerotinia 



b — Receptacle waxy, thick, tough or membranous, 

 c — Receptacle externally hairy. 



d — Receptacle seated on a web of hypha.'. 



e — Spores 1 -celled . . . Eriopeziza 



e — Spores at last more than 1 -celled . Arachnopcziza 



d — Receptacle without web of hyphte. 



e — Spores spherical . . . Lachnellula 



e — Spores elliptical or elongate. 



f — Hymenium clothed with dark hairs Desmazicrella 

 f — Hymenium smooth. 



g — Paraphyses blunt at the apices, 

 h — Apothecium delicate; spores 



1 -celled or 2-celled . . Dasyuyp/ia 



h — Apothecium thick; spores at 



last 2-celled . . . Lachnella 



g — Paraphyses sharp at the apices. 



h — Spores at last 1-celled . Lachnum 



h — Spores at last more than 1-celled Erinella 

 c — Receptacle externally smooth. 



d — Spores spherical .... Pitya 



d — Spores elliptical or fusiform, 

 e — Spores at last 1-celled. 



f — Apothecium smooth . . . Hymcnoscypha 



f — Apothecium notched . . Cyathicula 



