DISEASES OF TAXODIUM AND LIBOCEDRUS. 53 
lium, which, however, did not grow. Fresh pecky wood 
has been kept in moist chambers now for almost three 
years without any sign of growth. Further experiments 
are in progress. 
PROPAGATION OF DISEASE. 
The constant presence of the colorless mycelium in dis- 
eased trees makes it seem probable that this is the vegetative 
part of a fungus which causes the decay. As has been 
said, no fruiting organ has yet been found, so the manner 
in which this disease is carried from tree to tree is still to 
be discovered. A large number of logs were split open, 
and in some of these, large places were occasionally met with 
where an old branch had been healed over, leaving a cavity. 
In this cavity dense white felts of the mycelium, in which 
numerous crystals of calcium oxalate were imbedded, were 
obtained. There was, however, no sign of a fruiting 
organ. In some boards beginnings of such felts were found 
but none of these have developed any further. Reasoning 
by analogy from the diseases of trees already known we 
ought to find at some time a pileus of some sort. That 
infection takes place through a broken branch or some 
part of the top of the tree is most probable. Many trees 
were cut down in which the ‘* peck’’ could be traced 
directly to a broken branch, extending up and down from 
this point. This was especially marked where, as in a 
number of instances, the ‘*‘ peck ’’ was confined to one side 
of a tree. 
LOCALIZATION OF DISEASE. 
The most characteristic feature in connection with this 
disease, distinguishing it from others so far described, is 
its peculiar localization, i. e., the destruction of the wood 
in distinctly localized areas. The formation of the holes 
has been described, and it has been noted that the contrast 
between diseased areas and sound wood is a marked one, 
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