Bui. 1423, U. S. Dept. of Agriculture 
Plate 1 8 
v« ? W 
Fig. I.— Lichen Quadrat, Untouched 
Area established for study at Unalakleet, Alaska, April, 1922 
Fig. 2.— Lichen Quadrat, Cover Removed 
Same area as in Figure 1, Photographed after vegetation had been removed by picking, to 
note the later recovery 
