Nov. 10,1913 
Heart-Rots of Hardwood Trees 
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Table I. —Data on jive types of butt-rots found in white oak (Quercus alba L.). 
Name of rot. 
Cause. 
Diameter 
of stump. 
Diameter 
of rot in 
stump. 
Maxi¬ 
mum 
height 
of rot in 
butt. 
Number 
of trees 
having rot 
of the 
given 
height. 
Inches. 
Inches. 
Feet. 
' 26 
17 
28 
I 
40 
3<5 
24 
I 
30 
27 
20 
3 
25 
21 
19 
1 
29 
26 
l8 
2 
26 
19 
17 
1 
Hollow-producing rot... 
Hydnum erinaceus.... 
29 
23 
l6 
2 
32 
27 
15 
3 
26 
20 
14 
4 
28 
21 
13 
3 
28 
21 
12 
10 
30 
22 
II 
2 
27 
20 
IO 
13 
40 
36 
24 
1 
28 
2 6 
20 
1 
29 
24 
l6 
1 
Pocketed or piped rot.. 
Polyporus pilotae. 
30 
25 
15 
3 
29 
23 
14 
1 
28 
21 
12 
5 
26 
23 
10 
3 
29 
27 
l8 
1 
33 
24 
12 
2 
Brown, checked rot.... 
Polyporus sulphureus.. 
36 
26 
29 
19 
9 
8 
1 
4 
26 
22 
7 
4 
28 
24 
6 
19 
38 
32 
13 
1 
30 
27 
10 
1 
String and ray rot. 
Polyporus berkeleyi... 
■ 28 
21 
8 
2 
28 
17 
6 
3 
27 
20 
S 
2 
Straw-colored rot. 
Polyporus frondosus... 
29 
23 
4 
2 
25 
17 
3 
3 
