Bui. 510, U. S. Dept. of Agriculture. 
Plate V. 
Lumber Sanitation: Wood-Rotting Fungi.— V. 
Figs. 1 and 2. — Polystktus pargamenus: 1, Upper surface; 2, lower surface. Figs. 3 and 4. — Polystictus 
abietinus: 3, Typical form from a pine log; 4, plants showing upper and lower surfaces . Figs. 5 and 
6. — Polyporus adustus: o, Upper surface; 6, lower surface. 
