286 The Ohio Naturalist. [Vol. XI, No. 4, 



We know that there has recently been a marked development 

 in interest in forest planting, and that among all the limiber trees 

 thus far utilized for this purpose white pine has been a great 

 favorite. So far as I know, no record exists of the discovery of 

 the rust (Cronartium ribicolum) on currants and gooseberries in 

 the United States, but the disease may be serious from this point 

 of view as well. Through the kindly co-operation of the Depart- 

 ment of Nursery and Orchard Inspection, the Department of 

 Botany of the Experiment Station has received specimens of this 

 rust upon white pine seedlings growing in beds at Painesville, 

 Ohio. JMr. Evans, the Deputy Inspector, who discovered the 

 diseased specimens, stated that there was only one found among 

 the large number of seedlings. The specimen is preserved in the 

 Station Laboratory at Wooster. And of course both the Depart- 

 ment of Nursery and Orchard Inspection and the nursery people 

 are striving to stamp out the disease so far as that shipment is 

 concerned. The trees at Painesville were imported in the spring 

 of 1909 from Levavasseur & Co., of Ussey, France. vSubsequently, 

 Mr. Evans discovered one or more diseased specimens on premises 

 at Akron, Ohio. This lot of white pine was imported in the 

 spring of 190S from E. T. Dickinson, Chatenay, France. 



Diseased Seedlings Probably of German Origin. We have 

 from the- observations of American visitors, notes that in the 

 region of Ussey, and doubtless in that of Chatenay, there are no 

 white pine grown. The French nurserymen had secured white 

 pine seedlings more cheaply, as we had, by going to the German 

 growers, and doubtless this is the explanation of the disease upon 

 the seedlings imported from France. As stated in the Circular 38 

 before quoted, it was previously known that many German 

 growers of white pine had sent diseased seedlings to the United 

 States, and these had been distributed throughout much of 

 New York and in parts of Pennsylvania. 



