KEYS TO THE MORE IMPORTANT GENERA OF FUNGI IMPERFECTI 611 



Endoconidiophores not on a sporodochium; endoconidia colored, cylindrical, 

 several-celled, pushed out of the not flaring opening. 



Sporoschisma 

 The following genera with endosporous conidia have only one or two species each 

 and are not well understood: Sporendonema, Malbranchea, Glycophila. The 

 spores produced on the phialides of Cephalosporium, Gliocladium, and some 

 other genera have been shown by Miss Pinkerton (1936) to have an endog- 

 enous origin. 



Key to the Helicosporous Genera of Order Moniliales^^ 



(Based upon Linder, 1929, 1931a, 1931b) 



Conidiophores forming a loose arachnoid, cottony or velvety colony or else appar- 

 ently obsolete; not forming a compact fruiting body (Moniliaceae 

 and Dematiaceae). 

 Conidia coiled in three planes to form a cylindrical or barrel-shaped spore body. 

 Conidia in chains. Helicodendron 



Conidia not in chains. Helicoon 



Conidia coiled in two planes (sometimes but slightly inclined to coiling) or if in 

 three planes not as above. 

 Parasitic on vascular plants; conidiophores obsolete or as swellings of the 

 vegetative hyphae; spores toruloid, often nearly straight. 



Helicoceras (Gyroceras) 

 Saprophytic or some doubtfully parasitic on other fungi; conidiophores 

 present, in some not conspicuous, but then the spores not toruloid. 

 Conidial filaments thick in proportion to their length, not hygroscopic. 

 Conidia in chains. Helicodendron 



Conidia not in chains. 



Conidia longitudinally and transversely septate. 



Xenosporella 

 Conidia only transversely septate. Helicoma 



Conidial filaments thin in proportion to their length, hygroscopic. 



Conidiophores and conidia hyaline, the conidiophores as teeth on, or 

 short erect branches from, the creeping vegetative mycelium. 



Helicomyces 

 Conidiophores or conidia, or both, fuscous in shade; conidiophores 

 conspicuous. Helicosporium 



Conidiophores aggregated to form a stele upon which the spores are borne acrog- 



enously (Stilbellaceae) . Helicostilbe 



Conidiophores aggregated to form a flattened pulvinate or irregularly globose 

 sporodochium (Tuberculariaceae) . 

 Sporodochia effuse-pulvinate, at first covered by the epidermis of the host, then 

 erumpent; conidia once coiled, with thick hyaline walls. 



Drepanoconis 

 Sporodochia pulvinate to irregularly globose, dry, horny, or gelatinous; conidia 

 without a conspicuously thickened wall. 

 Conidia coiled in three planes to form a conical or oblong-ellipsoidal spore 

 body. Troposporium 



'3 The genera here assembled in one key represent members that are usually dis- 

 tributed in the form families Moniliaceae, Dematiaceae, Tuberculariaceae, and 

 Stilbellaceae. 



