IOWA DISCOMYCETES 47 



Spores brown 1 to 3-septate. 



Spores 1-septate Karschia. 



Spores 3-septate Mycolecidea. 



Plants hysteropatelliforni Hysteropatella. 



Spores muriform Blitrydium. 



10. CENANGIACEuE. 



Plants sessile or subsessile. 



Receptacle when fresh, leathery, horny or waxy. 



Stroma entirely wanting CenangiuM. 



Stroma more or less well developed. 



Asci 8-spored Dermatea. 



Asci many-spored Tympanis. 



Receptacle when fresh gelatinous. 

 Spores simple. 



Apothecium within watery, shrinking much 



when dry Sarcosoma. 



Apothecium within not watery. . . . Bulgaria. 

 Spores much elongated, many-septate. . . Holyvaya. 



Plants stipitate, large, urn-shaped Urnula. 



11. Stictidace^:. 

 Plants elongated; asci 8-spored; spores simple. . . Propolis. 



12. HYSTERIACE.E. 



Spores with transverse septa only. 



Spores colored, brown Hysterium. 



Spores hyaline. 



Spores 1-septate Glonium. 



Spores becoming 3-septate Gloniella. 



Spores muriform (with both transverse and longitudi- 

 nal septa) Hysterographium. 



ORDER I. HELVELLINE^E. 



Receptacle vertical, stipitate, mitrate, pileate, or clavate ; hy- 

 menium superior, exposed from the first; substance between 

 fleshy and waxy, rarely gelatinous. 



FAMILY 1. GEOGLOSSACE.E. 



Receptacle fleshy, waxy, or gelatinous; fructification separated 

 into a sterile stem and fertile receptacle ; hymenium on the out- 

 side of the receptacle, always exposed; asci clavate, non-opercu- 

 late. 



