■352 SUMMARY OF CURRENT RESEARCHES RELATING TO 



forms may at different stages be arranged under widely separated genera. 

 He finds the conidia the most stable'element ; after that the stalk-cell 

 or basidium, which immediately bears the conidia ; for this organ he 

 proposes the term " phialide," and the branches bearing these he regards 

 as " phialophores." All the genera and species with a distinct phialide he 

 classifies in the Phialidea?. As type of the family he describes Urophiala 

 mycophila g. et sp. n., in which the branch or phialophore gives rise 

 to a prophialide from the penultimate cell ; this cell produces three 

 phialides, each one bearing at the tip a colourless unicellular spore. 



Hyphomycetes.*— G. Lindau has completed the main bodv of the 

 work on moulds, and the last issue deals with a series of doubtful genera, 

 such as Rhizomorpha, Anthina, Ozonium, etc. He also adds an appendix 

 in which he corrects some errors of the previous fascicles, and records 

 genera and species described since the publication of previous parts. 

 The illustrations are numerous and instructive. 



Black Spot in Cheese.f— R. Burri and W. Staub investigated the 

 cause of blackening of Emmentaler cheese. The rind was especially 

 affected during storage in the cellar. The fungus is midway between a 

 Yeast and a Hyphomycete. Conidial formation was not seen, but from 

 physiological as well as morphological characters the authors have named 

 it M on ilia nigra sp. n. 



Uredinese.J— W. Tranzschel has made a special study of autocecious 

 Uromyces on Euphorbia in connection with Sydow's monograph of 

 Uredinete. Only a few species had been described, but these included 

 so many variations in development and spore form that he began to 

 examine the nature of these so-called species, and found, as he suspected, 

 that each one really included several, all quite distinct from each other. 

 He distinguishes two main groups of Uromyces on Euphorbia : those 

 in which uredo- and teleutospore sori arise on localised mycelium, while 

 the secidia arise on the diffuse mycelium of a whole shoot ; and, secondly, 

 those in which teleutospores arise over a whole shoot. On many of the 

 latter there are also ascidia, but it is not certain if they belong to the 

 same life-cycle. Numerous notes are given, and a full account of all 

 the twenty-seven species. 



Notes on the Larger Fungi.§— Ferdinand Oueguen found specimens 

 of Volvaria murinella on a pine cone which was still green, and he 

 argues that the fungus is a true parasite, as the mycelium must have 

 penetrated the tissues while they were still living. 



An account || of three edible mushrooms, Agaricus campestris, A. 

 arvensis, and A. eloensis, is published by the Board of Agriculture. 

 Short descriptive notes are given to enable the amateur to distinguish 

 them from other Agarics. Each one is also represented by a coloured 

 plate. 



* Babenhorst's Kryptogamen-Flora, abt. 9, lief. 116 (Leipzig, 1910) pp. 689-752. 



t Landw. Jahrb. Schweiz., 1909, p. 487. See also Ann. Mycol., viii. (1910) p 110 



\ Ann. Mycol., viii. (1910) pp. 1-35. 



§ Bull. Soc. Mycol. France, xxv. (1910) pp. 243-4. 



|| Journ. Board Agric, xvi. (1910) pp. 919-21 (3 pis.). 



