SALMON: SUPPLEMENTARY NOTES ON ERYSIPHACEAE 649 
nus gives in support of his view is that if the fungus were indige- 
nous to Ireland or Russia it would have certainly have been ob- 
served before, and would have spread to other countries. 
With the object of obtaining further knowledge on the circum- 
_ Stances of the outbreak of the present fungus in Russia, I wrote to 
Mr. N. A. Mossolow and to Professor A. de Jaczewski, Vegetable 
Pathologist to the Minister of Agriculture, St. Petersburg. From 
the former I received the following information: ‘The infected 
gooseberry bushes were planted several years ago, and were 
bought in Petersburgh and in Riga. Various kinds of gooseber- 
ries were affected by the disease. The summer of 1go1, when the 
disease appeared in Michailowskoje, was very hot and dry. We 
found the fungus in great abundance only on the fruit of the 
$0oseberries and not on the branches. The fruit garden in which 
the gooseberries are growing is surrounded by the park and woods 
on one side; on the other side by a hedge of Cratacgus. The 
fruit garden consists of apple trees, cherries, raspberries, strawber- 
ties, currants and a few hardy plants, Radws caesius,” etc. Pro- 
fessor A. de Jaczewski writes: ‘(I do not know of the fungus 
having been found anywhere else in Russia than in the neighbor- 
hood of Moskau. I do not think, however, that there is any 
-feason to believe that the parasite could have been introduced into 
Russia from America. We have a great many American fungj 
(on cultivated and wild plants) which could not have been intro- 
duced in any way (L/asmopora Cubensis, Phytopthora phaseoli, Exo- 
basidium Platydiscus), It is very probable that the Sphacrotheca is 
to be found in many localities here, but we have so few mycolo- 
gists in Russia that there are scarcely afy investigations on this — 
Subject, so that our knowledge on the geographical distribution of 
fungi in Russia is very defective.” 
he LITERATURE. 
28; Hennings, P. Uber die Verbreitung und das Vorkommen von 
_ Sphaerotheca mors-uvae (Schw.), dem Stachelbeer-Meltau, in Russ- 
_ land. Gartenfl. 51: 170, 171. 1902. 
Magnus, P. Ueber den Stachelbeer-Meltau. /. ¢., 245-247- 
