CLASSIFICATION. 81 



IV. Spores naked, on conspicuous threads, rarely compacted, 



small HYPHOMYCETES. 



Fertile threads compacted, sometimes cellular 

 Stem or stroma compound 



Spores dry, volatile ... Isariacei. 

 Mass of spores moist, diffluent . . . Stilbacei. 

 Fertile threads, free or anastomosing 

 Fertile threads dark, carbonized- 

 Spores mostly compound .... Dematiei. 

 Fertile threads not carbonized 

 Very distinct- 

 Spores mostly simple . . . Mucedines. 

 Scarcely distinct from mycelium 



Spores profuse ..... Sepedonici. 



DIVISION II. SPOIUDIIFERA. Sporidia in Asci. 



V. Fertile cells seated on threads, not compacted into a 



hymenium PUYSOMYCETBU 



Threads felted, moniliform 



Sporangia irregular . . , . . Antennariei. 

 Threads free- 

 Sporangia terminal or lateral .... Muconni. 

 Aquatic Saprolegniei. 



VI. Asci formed from the fertile cells of a hymenium . ASCOMYCETES. 

 Asci often evanescent 



Receptacle clavseform 



Asci springing from threads Onyr/enei. 

 Perithecia free 



Asci springing from the base ... Perisporiacei. 

 Asci persistent 



Perithecia opening by a distinct ostiolum . . SpTiceriacei. 

 Hard or coriaceous, hymenium at length exposed Phacidiacei. 

 Ilypogaeous; hymenium complicated. . . Tuberacei. 

 Fleshy, waxy, or tremelloid; hymenium mostly 

 exposed . Etodlacei. 



