Bui. 510, U. S. Dept of Agriculture. 
Plate VII. 
Lumber Sanitation: Wood-Rotting Fungi.— VII. 
Pig. 1. — Lenzites trabea, upper and lower surfaces. Figs. 2 and 3. — Lenzites betulina: 2, Lower sur- 
face; 3, upper surface. Fig. 4. — Lentinus lepideus, typical form on railway ties. 
