Septoria Euonymi-japonicce , Passer. 



This species, now for the first time added to the British 

 fungus flora by Mr. Green's fortunate discovery, is a member 

 of a large and somewhat miscellaneous aggregation of microscopic 

 fungi now classed as Deuteromycetes or Imperfect Fungi. They 

 are all suspected, and some have been proved, to be only forms 

 or states of higher fungi. The section to which Septoria Euonymi- 

 japoniccB belongs bears its spores in a flask-shaped vessel, the 

 perithecium, but, unlike the great class Pyrenomycetes, which is 

 also distinguished by the possession of this organ, the spores in 

 Septoria and its allies are not enclosed in mother-cells or asci, 

 but borne on more or less distinct stalks, like the agarics and 

 other Basidiomycetes. The genus Septoria (Lat. septum, a wall 

 or partition) is so called because the spores are many-celled. 

 This new species is found, as the photograph indicates, as black, 

 round or oval flatfish pustules or discs, pretty evenly disposed on 

 the dead, fallen leaves of the evergreen garden Euonymus. 



J. F. RAYNER-. 



October, 1915. 



