Fungi imperfecti. 



It is still more the case with this division of the fungi than with 

 the preceding divisions that the stated finding-places are no precise 

 expressions for their distribution. The greater number of Fungi imper- 

 fecti are so common that they may always be found where the outer 

 circumstances are favourable to them. 



Sphaeropsidales. 

 Sphaerioidaceae-Hyalosporae. 



Phyllosticta. 



Saccardo and Allescher do not agree as to how to distinguish be- 

 tween the two formgenera of Phyllosticta and Phoma. Saccardo calls 

 all the spot-forming species Phyllosticta and those occurring on dead 

 substratum Phoma. Allescher only considers the circumstance whether 

 the fungus occur on the leaves or not; I must agree with Saccardo 

 and classify all the parasitical forms as Phyllosticta and the sapro- 

 phytical ones as Phoma. 



The formgenus of Phyllosticta is very closely allied to that of 

 Phoma, both are represented in Denmark by numerous species. Phyllo- 

 sticta causes rather much damage by attacking living vegetable sub- 

 stances, Phoma is of less significance. The life-cycles of all these 

 genera have been very little investigated, several of them are able to 

 regenerate themselves during the whole year, and possibly they may 

 not produce other stages. Other species are known to correspond to 

 Ascomycetes, and the same ascigerous fungus is often provided with 

 two different conidial stages either a hyphomycetous stage and Phyllo- 

 sticta or a short-spored and a long-spored form both of the type of 

 Sphaeropsidales. 



