38 
Journal of Agricultural Research 
Vol. XI, No. a 
chambered form. Sporophores with immature spores from the same 
specimen are shown in c and mature spores in d. 
In April, 1917, a box of spoiled cranberries was received from Sioux 
City, Iowa, where they had been stored in the chaff during the winter. 
This fruit was of the Prolific variety and was grown near Walton Junc¬ 
tion, Mich. A considerable part of the berries was affected with a 
fungus rot having the external appearance of endrot. Two hundred 
berries of this kind were selected and cultures made from each by trans¬ 
ferring a portion of the pulp from the interior of the diseased berries. 
Of the 200 cultures made, 157 produced the typical growth of the endrot 
fungus. A considerable number of the entirely rotten and crushed 
berries from this lot bore pycnidia on and 
about the blossom end. These fructifica¬ 
tions were larger and thicker-walled than 
those from the old dry fruit illustrated 
in figure 2. Figure 3 shows sections of 
pycnidia from the Michigan berries. In 
these specimens the pycnidia are at first 
entirely buried in the tissue of the fruit, 
as shown in figure 3,0. As they develop, 
they break through the epidermis and 
finally become erumpent or subsuperficial, 
as shown in figure 3, b. When a portion 
of the sporogenous tissue of the pycni- 
dium is crushed out so that the indi¬ 
vidual sporophores are separated, it is 
found that they are frequently branched 
as shown in figure 3, c . The spores often 
appear septate. No real septum, how¬ 
ever, has been demonstrated, and the lack 
of uniformity in the division of the protoplasm seems to indicate that 
the)^ are only pseudoseptate. 
LIFE HISTORY OF THE FUNGUS 
Only pycnospores of the form described and illustrated have thus far 
been produced in cultures. On old rotten, dried, and mummied berries 
from 1 to years old, which had been apparently destroyed by the 
endrot fungus and had been lying on the ground exposed to the weather 
during the preceding winter, a discomycetous fungus has been found 
which is suspected of being the perfect form of this plant. The circum¬ 
stantial evidence is as follows: The apothecia are found on and about 
the blossom end of the mummied berries which have the peculiar dirty- 
yellow color characteristic of the endrot fungus. They are also asso¬ 
ciated with old or obsolete pycnidia of Fusicoccum puirefaciens. In 
section they show the same character and color of the mycelium at the 
Fig. 3.— Fusicoccum puirefaciens; a. Vertical 
section of a young pycnidium embedded in 
the tissue of a recently rotted cranberry; 
b , vertical section of a nearly mature py- 
cnidium showing two chambers, X 43.5; 
c , separate branched and simple sporo¬ 
phores with immature spores; d, separate 
spores, showing variations in form and 
size, X 420. 
