KEY TO THE FAMILIES OF ORDER ASPERGILLALES 355 



Perithecia sessile, with many asci. 

 Mycelium with hyphopodia. 



Spores two-celled, colorless. Schiffnerula 



Spores two-celled, brown. Phaeoschiffnerula 



Mycelium without hyphopodia, spores two-celled, brown 



Englerula 

 Perithecia stalked, with one ascus, spores two-celled, brown 



Thrauste 

 Perithecial walls of parallel hyphae which separate at maturity. Mycelium exten- 

 sive, with hyphopodia, ascospores two-celled, brown. 



Parenglerula 



Key to the Commoner Genera of Family Capnodiaceae 



Perithecia stalked or elongated vertically, wall of parallel hyphae. 



Mycelium with parallel walls, forming a thick spongy mass, perithecium long- 

 stalked, round, spores four-celled. Scorias 

 MyceUum of moniliform hyphae, perithecia vertically elongated, sessile or 

 stalked, spores muriform. Capnodiwn 

 Perithecia sessile or on a very short stalk, spherical, walls mostly of monilioid 

 hyphae. 

 Bristles on mycelium or perithecia. 



Perithecia without bristles, spores two-celled, hyaline. Tangled bristles on 



the mycelium which has no hyphopodia. Dimerosporina 



Perithecia without bristles, spores two-celled, brown, ascus single; short, 



dark bristles on the myceUum which has hyphopodia. Balladyna 



Perithecia with several asci, spores four- to more-celled, hyaline, bristles on 

 perithecia or myceUum or both. Chaetothyrium 



Bristles lacking. 



Spores several-celled, colorless. Limacinia 



Various other genera based on form and color of spores, etc. 



Key to Some Genera of Family Trichothyriaceae 



Forming ribbon-Uke strands of hyphae covering the myceUum of the host fungus. 

 Spores colorless, two-celled. Trichothrjrium 



Spores colored, two-celled. Trichothyriella 



Spores colorless, three- to four-celled. Trichothyriopsis 



Mycelium disappearing early, on stromata of fungi, spores colorless, two-celled. 



Loranthomyces 



Key to the Genera of Family Atichiaceae 



Propagula clustered in basket-like structures. AticMa 



Propagula in separate pockets. Phycopsis 



Key to the Families of Order Aspergillales 



Ascocarps subterranean, 1 cm. or more in diameter, cortex of many cell layers, 

 surrounding a "gleba" of irregularly arranged asci, with a central sterile por- 

 tion. Conidia not known. Family Elaphomycetaceae 



Ascocarps not subterranean, external or in some cases buried in the substratum, 

 mostly not over 2-4 mm. in diameter. 



