ISAEIACEI. 



547 



FAMILY IV. HYPHOMYCETES. 



Filamentous. Fertile threads naked, for the most part free 

 especially above, or loosely compacted, simple or branched 

 bearing the spores at their apices, rarely more closely packed, so 

 as to form a distinct common stem. — Berk. Outl. p, 337. 



Fertile threads compacted, sometimes cellular 

 Stem or stroma compound 

 Spores dry. volatile 

 Mass of spores moist, diffluent 

 Fertile threads free or anastomosing 



Fertile threads dark, carbonized 

 Spores mostly compound 

 Fertile threads not carbonized 

 Yery distinct 



Spores mostly simple 

 Scarcely distinct from mycelium 

 Spores profuse . 



Isariacei. 

 StUbacei. 



Dematiei. 



Mur.edines. 

 Sejp^doTiid. 



Order XVII I. ISAEIACEI. 



Threads more or less compacted, plants assuming hymeno- 

 mycetous forms. — BerJc. Outl. p. 338. 



Receptacle elongated. Tips free 



Floccose . . . . 



Dilated above 

 Eeceptacle branched 



Subgelatinous . 

 Receptacle clavate 



Dusted with the spores 



Isaria. 

 Anthinam 



Ceratium, 



Paxknoojhe. 



Sortie of the species formerly included in this order are now known to be 

 conidiiferous states of higher forms. Many others are suspected. 



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