PLATE 17 
A garicus tabularis: 
A. —A trench through the ring shown in Plate 16, A. The lower end of the trench 
is the outside and the upper end the inside of the ring. The outer withered zone lies 
above the mass of mycelium shown at the right of the picture. The mycelium extends 
back under the bare zone and becomes more or less interrupted just inside this zone. 
Akron, Colo., August 7, 1916. 
B. —A trench through the ring shown in Plate 16, B. The lower end of the trench 
is the outside, the upper the inside of the ring. The mycelium is shown extending 
nearly to the right end of the trench. The dense mycelium in the center of the 
illustration lies under the bare area. A sketch of this trench is shown in figure 13. 
