622 FUNGI IMPERFECTi: THE IMPERFECT FUNGI 



Conidia hyaline or pale, mostly embedded in slime. 



Gra'phium 



Conidia dark-colored. _ Sporocybe 



Conidia not in chains, more or less falcate, hyaline. 



Harpographium 

 Conidia hyaline, in chains; spore-bearing portion of synnema globose or 



elongated, without hairs. Stysanus 



Conidia in chains; but spore-bearing portion of synnema with long black 

 hairs. Trichurus 



Conidia phragmosporous. 



Spore-bearing portion covering the whole synnema; conidia smoke-colored. 



Podosporium 

 Spore-bearing portion only at the upper end of the synnema. 



Synnema of loose hyphae; spore-bearing head loose; conidia hyaline or 



pale. Isariopsis 



Synnema of stiff, firmly united hyphae; spore-bearing head distinct; 

 conidia pale or smoky. Arthrobotryum 



Key to the More Important Genera of Family Tuber culariaceae 



(After Lindau in Engler and Prantl, 1900) 



Conidia and conidiophores and sporodochium hyaline or the last bright-colored 



(not dark). 

 Conidia amerosporous. 



Sporodochia without hairs or bristles. 

 Conidia single, not occurring in chains. 

 Conidia not embedded in slime. 



Sporodochia of various shapes but never cup-shaped with definite 

 margin. 

 Conidiophores unbranched or more rarely a little branched. 

 Sporodochia almost spherical, superficial. 



Aegerita 

 Sporodochia cushion-shaped or tuberculate or indefinite in form. 

 Conidia globose; sporodochia very small, later becoming hard. 



Tuberculina 

 Conidia ovoid; sporodochia disk-like, larger. 



Hymenula 

 Conidiophores always branched, mostly considerably. 

 Conidia ovoid or elongate. 



Conidiophores not verticillately branched. 



Tubercularia 

 Conidiophores verticillately branched. 



De7idrodochium 

 Conidia fusiform to falcate or cylindrical. 



Fusicolla 

 Sporodochia cup-shaped, with definite margin. 



Patellina 

 Conidia embedded in slime; sporodochia disk-shaped, gelatinous- waxy. 



lUosporium 

 Conidia occurring in chains. 



Sporodochia more or less globose, sometimes stalked. 



Sphaeridium 



