Dec. 1, 1924 
Diagnosis of Decay in Wood 
551 
Table IV .—Diagnostic characters of various fungi causing wood rots. — Observa¬ 
tions based mainly on typical stage of rot 
Fungus 
* 
White rot 
Brown rot 
Zone lines 
! Bore holes large 
Bore holes small 
Spiral cracks 
01 d hyphae not 
constricted ° 
Old hyphae con¬ 
stricted a 
Old hyphae with 
little or no con¬ 
striction 
Buckles noted 
Medallion hyphae 
; 
Hyphae beyond 
incipient color 
Armillaria mellea _ 
X 
X 
X 
X 
X 
0 
Echinodontium ti nctori am _ _ _ 
X 
X 
X 
x 
X 
X 
Fomes annosus . _ ..._ 
X 
X 
X 
0 
Fomes applanatus 
X 
X 
X 
X 
X 
Fomes connatus . _ 
X 
X 
x 
x 
b X 
Forties everhartii . _ ._ _ 
X 
X 
Fomes fomentarius 
X 
X 
x 
x 
0 
Fomes fuhus 
X 
X 
x 
x 
x 
Fomes fraxinophilus 
X 
X 
x 
X 
X 
Fomes tgniarius. . 
X 
x 
x 
x 
0 
Fomes lands _ 
X 
x 
X 
x 
.. . . 
X 
X 
Fomes nigrolimitatus _ 
X 
x 
X 
x 
0 
Fames ninirala 
X 
x 
x 
x 
X 
X 
Fames raseus 1 
X 
x 
x 
x 
X 
X 
Ganoderma tsugae .. 
X 
x 
x 
C X 
x 
X 
Ganoderma curtisii _. _ _ . 
X 
— 
X 
X 
Hydnum septentrionale 
X 
x 
x 
x 
0 
Hymenochaete rubiginosa __ 
x 
x 
d x 
‘X 
x 
‘X 
0 
Lent.inus lenideus 
x 
x 
x 
x 
X 
X 
X 
Lenzit.es hetulina 1 
x 
x 
x 
X 
Lenzites sepiaria. _ _ _ 
x 
x 
x 
X 
X 
X 
Merulius lachrymans . . _ 
x 
x 
x 
X 
X 
Pholiota adiposa .. _ 
x 
X 
X 
0 
I 
Pleurotus uimarius ___ 
x 
x 
x 
x 
0 
Pleurotus ostreatus __ 
x 
b X 
«x 
/x 
*X 
0 
1 
PolypoTUS adustus (in Popu- 
lus sp.)___ 
x 
x 
x 
X 
Polyporus amarus.. _ . 
x 
X 
x 
X 
X 
Polyporus anceps _ _ :_ 
x 
x 
x 
X 
Polyporus balsameus ... ... 
x 
»x 
x 
x 
g X 
x 
X 
X 
Polyporus berkeleyi _ 
x 
x 
x 
b x 
Polyporus betulinus . 
x 
x 
x 
X 
1 
0 
1 
Polyporus borealis ... 
x 
x 
x 
0 
1 
Polyporus drdnatus _ 
x 
X 
x 
b X 
0 
! 
Polyporus guttulatus _ 
x 
x 
x 
x 
0 
Polyporus resinosus _ . 
x 
x 
x 
X 
0 
Polyporus robiniophilus _ 
x 
x 
x 
x 
0 
_ 
X 
Polyporus schweinitzii _ 
x 
x 
x 
x 
X 
0 
X 
Polyporus squamosus _ . . 
x 
x 
X 
h X 
X 
Polyporus sulphureus _ 
x 
x 
x 
x 
X 
1 
Polystictus abietinus 
x 
x 
X 
x 
X 
i 
Polystictus hirsutus _ 
x 
x 
x 
0 
1 
Polystictus pargamenus 
x 
x 
x 
x 
X 
1 
Polystictus versicolor . ... 
x 
x 
x 
x 
0 
! 
Poria incrassata _ . 
x 
x 
x 
x 
x 
0 
Poria laevigata __ 
x 
x 
X 
0 
i 
Poria subadda.. . . 
x 
x 
x 
X 
i 
Stereum sulcatum _ 
x 
x 
x 
...... 
x 
0 
1 
Trametes carnea __ 
x 
x 
x 
x 
_ 
X 
X 
Trametes malicola 
x 
x 
x 
x 
__ 
0 
Trametes protracta ._ _ ... 
x 
x 
x 
x 
I 
Trametes serialis __ 
x 
X 
x 
X 
X(?) 
X 
Trametespini _ . 
x 
x 
x 
x 
X 
Trametes isabellina ... . 
x 
x 
x 
x 
0 
Xylaria polymorpha .. 
X 
x 
f x 
*x 
'X 
e X 
0 
i 
a Passage of hyphae through cell walls of host. 
b Rare. 
c In summer wood. 
d In vessels. 
* In fibers. 
f Pitted tubes. 
o Late typical stage. 
h Only when passing through heavily lignified walls. (Buller.) 
