Montana Forest Tree Fungi 



131 



Specimens of most of the species listed here have been care- 

 fully checked with authentic material collected by the writer in 

 various parts of the United States and Europe. Specimens in 

 some of the well known exsiccati in the writer's possession have 

 been used in checking doubtful collections. Some authentic ma- 

 terial for comparison has been generously contributed by Dr. C. 

 H. Kauffman, Dr. H. D. House, Dr. L. H. Pennington, and Dr. 

 J. F. Brenckle. To these gentlemen thanks are due. The au- 

 thorities for the names of the plants are with a few exceptions 

 those responsible for the specific names only. The writer de- 

 sires to express his obligations to Mr. C. G. Lloyd for verifying 

 and determining some of the more difficult species in this list. 

 All specimens named in this list were collected and named by the 

 writer unless otherwise indicated and are preserved in the Labor- 

 atory of Forest Pathology, at Missoula, Montana. 



POLYPORACEAE 

 Merulius 



Merulius aureus Fr. on Pinus monticola ; Heron, Larix occidentalis, Mis- 

 soula. 



Merulius corium (Pers.) Fr. on Larix occidentalis, Evaro, Prunus demissa, 

 Missoula. 



Merulius lacrymans Schum. on mine timbers {Pinus contorta) , Butte, mill 

 yard timbers of Pseudotsuga taxifolia, Libby. This fungus or its wild form 

 {Merulius Silvester) is found rarely on decaying logs in the forest. 



Merulius molluscus Fr. on Pinus contorta, Anaconda, Pinus monticola, 

 Troy. 



Merulius niveus Fr. on Alnus tenuifolia, Missoula, Be tula occidentalis, 

 Evaro, Abies grandis, Libby. 



Merulius squalidus Fr. on Pinus monticola, Libby, Picea Engelmanni, 

 Darby. 



Merulius tremellosus Schrad. on Betnla occidentalis, Missoula, Pinus pon- 

 derosa, Evaro, greenhouse timbers, Missoula. 



Polyporus 



Polyporus adustus Willd. on Populus trichocarpa and P. tremuloides, Mis- 

 coula. Common. 



Polyporus albellus Peck on Populus trichocarpa, Darby, P. tremuloides, 

 Missoula, Betula occidentalis, Missoula. 



Polyporus amorphus Fr. on Pinus ponderosa, Darby, P. contorta, Haugan, 

 P. monticola, Troy, Picea Engelmanni, DeBorgia, Abies grandis, Thompson 

 Falls. 



Polyporus alboluteus Ellis on Picea Engelmanni, Taft, Laris occidentalis, 

 Libby, L. Lyallii, Hamilton, Abies grandis, Evaro. 



