114 



Mycologia 



The sporophores are attached to the bark, usually within ten 

 feet of the ground, and occur on dead tissue where the fungus 

 has grown outward from the heart wood into the bark, thereby 

 killing the living tissues of the tree, at this point both sap wood 

 and bark are permeated with the reddish-yellow mycelium of the 

 fungus. The sporophores are usually located in the longitudinal 

 depression or furrows which are found on most junipers. They 

 were rarely found associated with an old dead branch or knot 

 hole. The damage done by this rot in certain localities is very 

 great ; often many mature and over-mature trees are weakened at 

 the butt to such an extent that they bend, split, and flatten near 

 the ground and either fall or remain in a leaning position ; later 

 other fungi or fire kills the trees outright or hollows them out so 

 that they are easily blown down. Even when the injury is not 

 sufficient to produce such damage, the wood of many trees at- 

 tacked by this fungus is rotted to such an extent that it is unfit 

 for commercial purposes. 



Office of Investigations in Forest Pathology, 

 Bureau of Plant Industry, 

 Washington, D. C. 



Explanation of Plate LXIV 

 Sporophore of Fomes juniper inns. XVz. 



Sporophore of Fomes texaniis, old and weathered specimen. X 

 Sporophore of Fomes texamis, young specimen two or three years 

 old. X y2. 



Sporophore of Fomes earlei, young specimens one or two years old. 



X 3/2. 



Sporophore of Fomes earlei, old and weathered specimen. X Yi. 

 Sporophore of Fomes earlei, young specimen three or four years 

 old. X V2. 



Explanation of Plate LXV 

 Fomes texanus, longitudinal section of sporophore. X ^. 

 Fomes earlei, longitudinal section of sporophore. XY. 

 Fomes jimiperinus, longitudinal section of sporophore. X/^. 

 Fomes texamis, surface of hymenium showing pores. X2. 

 Fomes earlei, surface of hymenium showing pores. X2. 

 Fomes jimiperinus, surface of hymenium showing pores. X2. 

 Fomes texanus, longitudinal section of wood showing rot. XJ^. 

 Fomes earlei, longitudinal section of wood showing rot. X ^. 

 Fomes juniperinus, longitudinal section of wood showing rot. X 



Fig. I. 



Fig. 2. 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 6. 



Fig. I. 



Fig. 2. 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 6. 



Fig. 7. 



Fig. 8. 



Fig. 9. 



