Hedgcock and Hunt : Dothichiza populea in the U. S. 301 
for shade or ornament. In some of these localities, black pop- 
lars, mostly recently planted, were found to be seriously diseased. 
In three cases only, a few large trees were found, not only of the 
black but also of the Canada poplar, which had apparently been 
diseased for several years. A future study of the cankered areas 
on the trunks of these trees will probably establish approxi- 
mately the date of their formation. 
In 1915 two specimens of diseased black poplar were sent by 
Joseph L. Richards to the Plant-Disease Survey of the Depart- 
ment of Agriculture, one from West Lynn, Mass., and the other 
from Hanover, N. H. Both specimens have since proved to be 
attacked by Dotliicliisa populea. Mr. Richards reported a badly 
diseased condition of poplars in both localities in 1915. 
Earlier Outbreaks of the Fungus in Europe 
Dothichiza populea was first described and named in 1884 by 
Saccardo and Briard (4; 672),^ who reported the fungus as 
occurring as a saprophyte on the dead branches of Popidus at 
Troyes, France. 
Krieger^ later distributed specimens of Dothichiza populea col- 
lected on limbs of Populus nigra near Konigsten, Saxony, March 
28, 1893, one of which has been examined by the writers. 
Delacroix (i), in 1903, was the first to make a careful study 
of Dothichiza populea and to note its real effect on poplars. He 
not only ascertained that the fungus was parasitic in its nature, 
but also that it was the cause of a serious disease in France. 
Among the varieties of poplars attacked, he mentions Populus 
virginiana (a synonym for Populus deltoides), Popidus nigra, 
and Populus holleana. The disease was found in a number of 
localities and had been observed for several years previous to 
the time of publication. In 1906 (2), he published an additional 
article on the disease, adding to the data on its distribution and 
to the knowledge of the fungus, at the same time giving direc- 
tions for its control. 
Voglino, in 1907 (6: 193, 196), reported Dothichiza populea 
1 The figures in parentheses refer to “ Literature cited ” at the end of this 
paper. 
2 Krieger, K. W. Fungi Saxonici Exsiccati. No. iioo. Konigstein.a.E., 
1895. 
