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BULLETIN OF THE BUSSEY INSTITUTION. 
few years the disease has been generally known in this country under 
the name of Peridermium cerebrum, Pk., described in the 25th Report 
of the “State Botanist” of New York. As occurring in New Jersey 
and Massachusetts, the disease does not differ from the corticolous 
form of Peridermium Pini of Europe, which has at times all the 
characters assigned to Peridermium cerebrum. Hartig thinks it doubt- 
_ful whether the corticolous and acicolous forms really belong to the 
same species, but they are not generally separated by European mycol- 
ogists. In New England the fungus seems to be rather rare, and we 
have never seen the acicolous form. The plants attacked at the 
Bussey were all raised from seed sent from California, and were not 
over two feet in height. Most of the plants apparently recovered later 
in the season, but the following year the greater part of them died. 
In this connection, we would mention a superb specimen of Per/der- 
mium received from California, where it was found by Dr. H. W. 
Harkness, on Pinus insignis, and which was also collected during the 
last summer by Sir J. D. Hooker. ‘The branches affected were swol- 
len and distorted; and in the specimen received from Dr. Harkness 
the swollen surface was so covered by the ecidia that the surface was 
completely yellow, the bark being nowhere visible. A microscopic 
examination shows that the spores and peridial cells do not essen- 
tially differ from those of the species found at the Bussey. With- 
out having seen Californian specimens in a young state, it would be 
presuming too much to say that the species of the West coast is the 
same as that of the East; but the variation of the fungus, in Europe, 
would lead one to be cautious in accepting species which depend for 
their characters rather upon luxuriance of growth than.distinct anatom- 
ical characters. ‘The fungus, if new, and that point can only be well 
settled by securing young specimens, should bear the name of Peri- 
dermium Harknessii, which was proposed by Mr. J. P. Moore, in the 
San Francisco Microscopical Society, in 1876. In this connection it 
should not be forgotten that the acicolous form of Peridermium Pini 
occurs on Pinus insignis in California. 
The rare fungus mentioned in the “Bulletin,” Vol. I, No. 23, on 
cones of Abies excelsa, at Newton, -Zcidium conorum Picea, Rees, 
has recently been received from Colorado, where it was found on cones 
of Abies Engelmanni, by Mr. T. S. Brandegee. 
In the region of Boston, there are found two species of Phragmi- 
