4",? JDURXAL or R1RKSTRV 



shaded portions of the logs. Those logs not in direct contact with the 

 grotind developed no sporophores. This demonstrates the rapid and 

 comparatively numerous production of fruiting bodies on fallen trees 

 under favorable environment. 



On this area a large Engelmann spruce infected with 7". l^ini was 

 felled and cut into log lengths in August of 1914. When felled the 

 rot, although well advanced, occupied only a portion of the heartwood. 

 and when examined in September, 1915, large portions of the sapwood 

 had been invaded, and small, young sporophores producing spores 

 had developed from the sap zone on the ends of two of the logs. 

 This observation indicates a more rapid development of the rot in the 

 host after felling than was apparent when the tree was alive, and 

 shows how soon after the tree is down the sporophores begin to 

 appear. An additional six months would have produced large spo- 

 rulating fruiting bodies upon these logs. 



On a cut-over portion of the Lindberg Creek area on the Coeur 

 d'Alene National Forest, in 191(5. several cull logs of western white 

 pine {P. ))iouticola) left on the ground along one of the logging chutes, 

 were observed to have the unmistakable cubical butt rot caused by 

 Polvf'orKs scJnccinitcii. The majority of the logs. 11 in all, upon 

 examination were found to bear sporophores of this fungus issuing 

 from various surfaces. All the sporophores were produced in 191(), 

 except one which had developed in the preceding year. These fruit- 

 ing bodies were large and presented a formidable menace to the 

 remaining living white pines upon the area. IMany of the P. sdnccin- 

 itsii fruiting bodies, both dead and alive, were obscr\'ed in the duft" 

 near the base of white pine and Douglas fir {Pscuciotsitga taxifolia) 

 stumps upon this area. In the same year, on the old Silver Creek 

 cutting logged off in 1915. in the same forest, several cull logs of 

 western white pine were noted, some with new "conks" of T. f^itti and 

 others with fresh sporophores of P. sclnccinit::'.! upon them. In all 

 the cases cited, the sporophores of saprophytic fimgi, and fames 

 phiicola in particular, were quite numerous upon the slash left upon 

 the cut-over areas. T. pini was very common on old snags. At least 

 50 per cent of these were capable of producing spores or had already 

 produced them that season. Sporophores were more numerous upon 

 logs in direct contact with the ground than upon windfalls, culled trees 

 and logs, etc., which were supported sevcal feet from the ground by 

 other logs or trees. 



On the cut-over area logged in 1907, near Seeley Lake on the 

 Missoula National Forest, the following observations were made in 



