88 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Gnomonia Caryse and Gloeosporium Caryae.* — The Glmosporium 

 fungus grows on hickory-leaves, causing the formation of large diseased 

 areas. F. A. Wolff has made a cultural study to determine the perfect 

 form, and finds that it is a Gnomonia. It was impossible to reproduce 

 the pycnidial stage from ascospores, except on hickory-leaves, but 

 inoculations on these were quite successful, and typical subcuticular 

 pustules and spores were formed. The two forms had not previously 

 been associated. 



Genus Septoria.f — ^H. Diedicke has undertaken a review of this 

 large genus of Fungi Imperfecta He finds, in his consideration of the 

 various species, that some are described as having pseudo-perithecial 

 walls, others without, and he considers that two distinct genera are 

 represented. He would, therefore, retain in Septoria all those species 

 that have a pseudo-pycnidial spore-chamber, and place in Gylindrosporiu'm 

 the species with an open spore-layer. He thinks that probably some of 

 the species of such genera as Ascochyta, Fhyllostida, etc., will be proved 

 to have also pseudo-pycnidia, and that they will all form a group of 

 Pseudopycnidiales. Many of the species are critically described. 



Study of Pestalozzia.J — G. Bainier and A. Sartory have described 

 a new species of this genus, which appeared on damp hay. The spores 

 are several-septate, and are always surmounted by three or rarely four 

 bristle-like processes. The authors state that after germination a com- 

 plex of cells is formed, and that the spores develop within that complex 

 or pycnidium. As they reach maturity they burst the apex of the 

 structure and so escape. At each end of the brown spore there is a 

 colourless cell, and it is from the brown cell next the lower colourless 

 cell that the germinating tubes are formed, generally two from the one 

 cell. Conidia, exactly like those produced in the pycnidium, are formed 

 on the branches. Cultures w^ere made in solid and liquid media, and 

 the results noted. 



Biological Study of Aspergillus, etc. — G. Bainier and A. Sartory§ 

 made cultuies of Aspergillus Scheelei on a great variety of substrata. 

 They found there were two forms which differ very slightly from each 

 other, but while one produces a blue fluorescence and coagulates milk, 

 the other possesses neither of these characters. Aspergilhis Scheelei 

 produces a yellow pigment. An account is also given of A. umbrosiis, 

 which was cultivated on carrot, gelatin, etc. 



The authors || contribute also a study of two new species of Feni- 

 cillnim ; the first, P. diveryens, found in a decaying chestnut, forms a 

 red pigment in the cultures and develops a slender Goremiwn growth ; 

 the other, P. ritricolum, was found on orange-skin ; it secretes a yellow 

 pigment. These different fungi are described and illustrated. 



* Ann. I\[ycol., x. (1912) pp. 488-91 (1 pL). 



t Ann. Mycol., x. (1912) pp. 478-87. 



X Ann. Mycol., x. (1912) pp. 433-6 (1 pL). 



§ Bull. Soc. Mycol. France, xxviii. (1912) pp. 257-69 (2 pis.). 



II Bull. Soc. IMycol. France, xxviii. (1912) pp. 270-9 (1 pL). 



