Zeller: Contributions to Oregon Fungi 



183 



104. Polyporus rufescens Pers. 



On oak stump, Corvallis. November. Infrequent. No. 1793. 



105. Polyporus sensibilis Murrill. 



On Abies grandis, Corvallis and Mary's Peak. October. Not infre- 

 quent. Nos. 1754, 2018. 



This plant has been reported once from Oregon by Dr. Murrill, the 

 collection taken at Glenbrook. 



106. Polyporus Spraguei B. & C. 



On dead Quercus Garyana, Corvallis. October No. 21 14. 



I have in my herbarium (No. 546) a collection of this species taken in 

 Seattle, Washington. . This is a considerable extension of range for the 

 species from the Mississippi Valley. 



107. Polyporus zonatus Fries. 



On cherry and pear, Corvallis and Medford. Frequent. Nos. 1893, 

 1899. 



P. zonatus has very little to distinguish it from P. versicolor, of which 

 it is perhaps a segregate. 



108. Hexagonia carbonaria B. & C. 



On charred wood, Corvallis. February. Infrequent. No. 1887. 



109. Poria contigua (Pers.) Karst. 



On decayed wood of Quercus Garyana, Corylus calif ornicus and some- 

 times Acer macrophyllum, western Oregon. Very frequent. Nos. 1723, 

 ; 1808, 1888, 1891, 1920, 2220. 



This is a most common brown Poria in western "Oregon. It is some- 

 times found reflexed where moss fronds have been followed but infre- 

 quently it has been found reflexed without apparent provocation. 



Dr. L. O. Overholts says concerning this fungus, " I have European 

 material from Romell with which it agrees exactly. Romell has written 

 me that he considers P. contigua identical with Trametes tenuis Karst., 

 and I am inclined to the same opinion." The writer has reflexed speci- 

 mens among those cited above and perhaps the plant should be listed 

 under Trametes. 

 no. Poria sanguinolenta (A. & S.) Fries. 



On oak fence post, Corvallis. March. Infrequent. No. 1902. 

 in. Trametes carnea (Nees) Cooke. 



On peach, prune and conifers, western Oregon. Late fall, winter and 

 spring. Extremely common. Nos. 1760, 1783, 1826, 1827, 1862, 1885, 

 1909, 1930, 2146. 



Trametes carnea causes more than 90% of all the heart-rot of prune 

 and peach trees in the orchards of western Oregon. It is extremely de- 

 structive, producing a rot which cannot be distinguished from that pro- 

 duced by this fungus in coniferous woods. I believe this fungus to be 

 a true Trametes. It does not become perennial. I have watched the 

 same stumps for several seasons and the fruiting bodies die each season 

 and new ones appear in their stead the following season. There seems 

 to be layered growth marked by horizontal lines in vertical cuts through the 

 context but this evidently represents periodicity of growth during a 

 season rather than perennial growth. I believe this is distinct from 

 the perennial Fomes roseus. 



