Dodge: Heart-Rot of Apple Trees 
13 
flat form about four inches wide by six inches long, and not over 
half an inch thick. The tubes are about one fourth of an inch 
long, the flesh is zonate and about as thick as the tubes are long. 
The fungus was white when fresh but it turned yellowish or 
straw-colored on drying. We have further specimens of this type 
of fungus, many of them growing on the inside of the hollow 
trunks of the apple tree. Mr. Burgdorff called my attention to 
one of this kind at Scarsdale, November 17. About five feet 
above the ground there was a large knot-hole leading into the 
hollow trunk of an apple tree about seventy-five years old. Sev- 
eral overlapping, much divided brackets had developed inside the 
trunk on the decayed heartwood about a foot above the opening 
formed by the knot-hole. This led me to examine more closely 
hollow trees in different localities and, in one orchard at Spring 
Valley, N. Y., on November 26, we found six different trees that 
had the same type of fungus entirely concealed within. In all 
cases the color was masked by the pulverized wood, the tubes and 
flesh were dingy or brownish. The upper surface especially was 
a reddish-brown. The ones found at Spring Valley were hard 
and dry and had evidently reached maturity several weeks pre- 
viously. On December 7, Mr. Burgdorff brought in another 
specimen of this same general type, although there are in this one 
certain peculiarities that may serve to connect up many of the 
forms that are found on the apple tree. It was late in the sea- 
son, the fungus was in fairly good condition, and spores could be 
found in abundance. It was about five inches long and six inches 
wide, consisting of several shelving brackets grown together be- 
hind, and the flesh was beautifully zonate and at least an inch 
thick, thinning out toward the margin. The tubes were about 
one fourth of an inch in length. 
Professor Harper, as noted above, found quite another type 
growing on an apple tree at Bedford City, Va., September 16. 
This form, shown on PI. iy6, resembles the one shown on PI. 275 
with respect to surface markings, etc., but it is a solitary form, 
more hoof-shaped, and has flesh that is several inches thick and 
strikingly zonate. The tubes are half an inch long and very 
much larger than those of any other specimens previously men- 
