184 Report oF THE BOTANIST OF THB 
teleutospores found were a few belonging to Chrysomyza albida. 
We were finally obliged to refer the rust to Dr. W. G. Farlow, 
who informs us that it is Uredo miilleri Schroet. It is known 
only in the uredo stage. 
This rust was very abundant in three large plantations, all on 
one farm, but we have not seen it anywhere else on cultivated 
blackberries except at the Station where perhaps half a dozen 
leaves were affected by it. In the plantation in which the rust 
was first discovered and where it was most abundant there are 
two kinds of soil—light sandy soil and sandy loam. On the 
former, almost every leaf was affected; while on the latter the 
plants were practically free from rust until in September, and . 
even then they were very much less rusted than plants in the 
sandy soil. In one of the other plantations the rust was most 
abundant on a sandy knoll. It is plain that it has a preference 
for plants in sandy soil.4 
There is no cause for alarm at the appearance of this black- 
berry rust. It is not new but simply an unusual outbreak of a 
fungus which has long been known to attack blackberries occa- 
sionally. In case it should become abundant it is improbable 
that it would cause much damage. The owner of the affected 
plants says that they have been yellow with the rust every fall 
for several years, but it does not seem to injure them. It ap- 
pears too late in the season to do much damage. 
Luar Spor (Septoria rubi Westd.).—Leaf spot has been of quite 
common occurrence on blackberries, but we doubt if it has done 
any material damage to them. It was observed that on different 
varieties the fungus may produce quite different spots. On 
some varieties the spots are light brown, while on others they 
are dark brown. Sometimes these differences are so marked 
that at first we suspected that the two kinds of spots were 
caused by different fungi, but we found only Septoria rubi upon 
them. 

7 Stone & Smith (Twelfth Ann. Rep. Mass. (Hatch) Exp. Sta., pp. 61-738) 
have observed that the same is true of asparagus rust. 
