CLASSIFICATION. 
IV. Spores naked, on conspicuous threads, rarely compacted, 
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small ‘ a . : . . . HypnomycerEs, 
Fertile threads compacted, sometimes cellular— 
Stem or stroma compound— 
Spores dry, volatile . é ‘ . « Lsariacei. 
Mass of spores moist, diffluent . . - Stilbacet. 
Fertile threads, free or anastomosing— 
Fertile threads dark, carbonized— 
Spores mostly compound . . ° « Dematier. 
Fertile threads not cai bonized— 
Very distinct— 
Spores mostly simple . . . « Mucedines. 
Scarcely distinct from mycelium— 
Spores profuse . 7 6 + «+ Sepedoniei. 
Division II. SPORIDIIFERA, Sporidia in Asct. 
Y. Fertile cells seated on threads, not compacted into a 
hymenium . ‘ e . . . . . PasysomycerEs 
Threads felted, moniliform— 
Sporangia irregular. . . ° . « Antennariei. 
Threads free— 
Sporangia terminal or lateral . e ‘; « Mucorine. 
Aquatic F 7 . . ° . . - Saprolegniei. 
VI. Asci formed from the fertile cells of a hymenium - ASCOMYCETES. 
Asci often evanescent— 
Receptacle claveform— - 
Asci springing from threads. e 2 Onygenei. 
Perithecia free— 
Asci springing from the base . : « Perisporiacei 
Asci persistent— 
Perithecia opening by a distinct ostiolum . Spheriacei. 
Hard or coriaceous, hymenium at length exposed Phacidiacet. 
Hypogeous; hymenium complicated. 8 - Tuberacet. 
Fleshy, waxy, or tremelloid; hymenium mostly 
exposed é * 7 * . « Llwvellacei. 
