G04 FUNGI IMPEKFECTi: THE IMPERFECT FUNGI 



Pycnidia with well-developed roof but basal portions poorly differentiated. 



Family Leptostromataceae 

 Pycnidia with well-developed base, soon opening wide to form a cup-like or 

 saucer-like structure. Excipulaceae 



Spores produced in an acervulus; often other spore types present. 



Order Melanconiales 

 Single family. Family Melanconiaceae 



Spores produced neither in pycnidia nor in acervuli; but on or within free sporo- 

 phores free from one another or grouped in various ways. 



Order Moniliales 

 Conidiophores or spore-bearing hyphae more or less separate, not united into 

 synnemata nor on sporodochia (cushion-Uke structures). 

 Conidia and conidiophores hyaline or bright-colored, not brown or black. 



Family Moniliaceae 

 Conidiophores, and usually but not always the conidia, brown or black. 



Family Dematiaceae 

 Conidiophores united into synnemata, the conidia arising on the spreading 

 tips of the conidiophores in a head at the top or all up and down the 

 sides. Family Stilbellaceae 



Conidiophores usually rather short, arising more or less radially from cushion- 

 like sporodochia. Family Tuberculariaceae 

 No asexual spore forms known. Order Mycelia Sterilia 



Keys to the More Important Genera of Fungi Imperfecti 



Key to the More Important Genera of Family Sphaeropsidaceae 

 (Based largely upon Lindau in Engler and Prantl, 1899-1900) 



Conidia one-celled, spherical, ellipsoid, or oval. Amerosporae 

 Conidia hyaline. Hyalosporae 



Stroma lacking. 



Pycnidia smooth, without appendages. 

 Conidia not produced in chains. 

 Conidia without appendages. 



Pycnidia not surrounded by a subiculum; free or sunk in the sub- 

 stratum. 

 Pycnidia with regular ostiole or papillate. 

 Conidiophores simple or but little branched. 



Pycnidia at first covered by the epidermis, later becoming 

 free, at least around the ostiole. 

 Conidia less than 15 ju long. 



Forming definitely margined spots on leaves. 



Phyllostida 

 On any part of the host, but if on leaves not forming 

 definitely delimited spots. 



Phoma 



(see also Fhonwpsis) 

 Conidia over 15 ju long. Macrophoma 



Pycnidia free from the first, free on wood or bark. 



Aposphaeria 

 Conidiophores dendroidally or verticillately branched. 



Dendrophoma 



