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Bul. 1262, U. S. Dept. of Agriculture. PLATE 
TRANSVERSE SECTIONS OF HEMLOCK, WHITE PINE, SOFT MAPLE, AND BASS- 
WOOD, SHOWING ROTTED AREAS. 
A, Transverse section of a hemlock ( 7'suga canadensis) log from tree No. 10, showing the incipient 
stage of rot produced by Ganoderma tsugae. B, Transverse section of a white pine (Pinus 
strobus) log of tree No. 14, showing the ring-rot of Trametes pini. C, Transverse section of a 
soft maple (Acer rubrum) log of tree No. 16, showing the incipient and typical stages of Fomes 
igniarius. The dark area surrounding the central rotted area is the incipient region. D, The 
transverse section of a basswood (Tilia americana) log of tree No. 18, showing the incipient 
rot produced by Phcliota adiposa. Note the darker outer zone of discoloration. 
