516 SUMMARY OF CUEEENX' RESEARCHES RELATING TO 



Bundles of infected carices were placed near the nettles, and, in time, 

 the aecidia appeared on the leaves. Notes on other Pucciniae are given, 

 and on several other micro-fungi. 



Technical Mycology.* — Fr. Fuhrmann has issued in book form a 

 series of lectures on the various technical aspects of the lower fungi. 

 The book is mainly concerned with bacteria, but considerable attention 

 is also given to the question of yeasts. The writer not only describes 

 their importance as fermentative agents, but he gives an account of their 

 classification. 



Retention of Vitality by Fungi in Dry Conditions.t — A. H. R. 

 BuUer records cases of fungi that have retained their vitality for years 

 while in a state of complete desiccation, though he also thinks that 

 possibly no Hymenomycete can resist complete drying up longer than 

 ten years. He has demonstrated that the fruit-bodies of Schizophyllum 

 commune, after having been kept dry and exposed to air for two years 

 and eight months, were able to retain their vitality, though they had 

 been dried by the phosphorus-pentoxide and charcoal-bulb hquid-air 

 method and subjected to the temperature of liquid air for three weeks. 

 To test their vitality they were placed in a damp chamber and left for 

 about twelve hours. They were then placed on a glass side and it was 

 found that they had resumed their normal activity and were discharging 

 spores. Buller suggests that there is a temporary suspension of vitality. 



Plant Diseases.}: — W. Pietsch has described a new disease of 

 quinces and apples in Germany due to the fungus Trichoseptoria fructi- 

 yena. It causes faintly yellowish-brown spots, or sometimes darker, 

 which cause a depression on the surface. On these spots a circle of 

 pycnidia are formed. 



G. H. Pethybridge§ has recorded his observations and experiments on 

 a series of organisms causing potato-disease. Ordinary blight or black- 

 blight due to Phytophthora infestans is dealt with in reference to the 

 attempts made to check or stamp out the disease by spraying or by 

 steeping seed tubers in copper-sulphate solution. The varieties that are 

 more or less disease resistant were also tested. Another species, P. 

 erythroseptka^ causing pink rot of potato tubers, is similarly discussed 

 from the economic standpoint, as are also stalk or Sclerotinia disease 

 and powdery scab {Spongospora subter/wiea) ; and a black stalk rot due 

 to Bacilliu.s melanogenes. 



L. Petri || has recorded the presence of Endothia pseudoradicalis 

 sp. n., which appeared on the stump of a tree that had been cut down 

 on account of Chestnut disease {E. radical is). It differs specifically from 

 the latter in the smaller size of the spores and in the less developed 

 stroma. 



N. Patouillard 1 gives a minute description of a Sepiobasidium that 



* Vorlesungen iiber Tech. Mycol. Jena : G. Fischer, 1913. 



t Trans. Brit. Mycol. Soc, iv. (1913) pp. 106-112. 



X Ber. Deutsch. Bot. Gesell., xxxi. (1913) pp. 12-14. 



§ Journ. Dept. Agric. Tech. Inst. Ireland, xiii. (1913) No. 3 (3 pis. and figs.). 



li Atti R. Accad. Lincei, cccx. (1913) pp. 653-8 (2 figs.). 



1 Comptes Rendus, clvi. (1913) pp. 1699-1701 (2 figs.). 



