210 MANUAL OF TREE DISEASES 



which is characteristic of this wood-rot. Hollow trunks are 

 not formed. The less affected summer- wood of the rings and 

 the wood bordering the decayed area are yellowish brown. The 

 sapwood and bark are affected and permeated by the reddish 

 yellow mycelium. 



The sporophores ,of the causal fungus appear from crevices in . 

 the bark where the fungus has emerged from the sapwood and 

 inner bark. They are hoof-shaped or cylindrical woody bodies 

 with a light yellowish or brown to black checked upper siu-face. 

 The yearljr growth of the sporophore is apparent in the concen- 

 tric furrows on the upper surface. The under surface is light 

 yellowish and the pores are very small. The inner structure is 

 yellowish. 



Cause. 



The stringy brown wOod-rot of junipers in the Southwest is 

 caused by the fungus Fames texanus. No definite studies are 

 reported on the method of infection. The general life history 

 and control of the wood-rot fungi are discussed on page 64. 



Reference 



Hedgcock, G. G., and Long, W. H. Preliminary notes on three rots 

 of jumper. Mycologia 4 : 109-114, pis. 64r-65. 1912. 



Basal Heaetwood-Rot 



Caused by Poria Weirii Murrill 



This heartwood-rot is the most important basal decay of the 

 western red cedar throughout northwestern United States. 

 After the tree falls, the heartwood and sapwood of the entire 

 tree are soon destroyed by the same fungus. In the first stages 

 of decay, the wood is uniformly split into its separate annual 

 rings. The affected wood is brown and brittle. 



The causal fungus forms fruiting-bodies on the fallen trunks 

 of the affected trees. These fruiting-bodies are brown and 



