Bui. 510, U. S. Dept. of Agriculture. 



Plate V, 



Lumber Sanitation: Wood-Rotting Funqi.— V. 



Figs, l and 2. — Polystictus 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. — PolypoTUs adustus: 5, Upper surface; 6, lower surface. 



