A species of Lentinus either identical 01 closely related to 

 Lei tinus lenideuo Pr, attacks the he art wood cf both living and 

 dead conifers. It forms very large fruiting bodies on Pinut: pon- 

 derosa in Arizona, and causes a yellow to red-brown rot much Dike 

 that produced by Foraec laricia, but less extensive, It ;ilao at- 

 tacks the wood of Pinur; conturta, Abies concolor, Larix ocr5idei:- 

 talis, and P&eudotsuga taxifolia. 



A species of Kydnum related to Hydnum coral.lc.ides Scco. 

 attacks the wood of both living and dead trues of Abies concolcr 

 (Gord,) Parry, A. grand?a Lindl., Picea enge.liaann:. Engelra, , and 

 Pseudotsuga taxif olaa. The fungus fruits :.n late autumn, and 

 produces a peculiar honey-combed rot, in which there is an absence 

 of cellulose layers aruund the BM .11 cavities as .in the rot 



caused by Trametes pjni* 



In general the heart -rot ting fungi in conifers enter uie 

 trees through exposed heartwcod in broken branches, fire scat's, etc., 

 and do not attack the sapv/ooi first. Jliis is especially true of 

 Trametes pini, Fomes laricis, and Echinodontium tinctor.iun. 

 most localities in the Northwest Trametes pini often continues tc 

 fruit abundantly on dead logs and stunps img af'ler the death of 

 the trees, but in tlio Southwest the dry climate -usually prevent* 

 the formation of sporophores except on living trees, and then only 

 sparsely. This is coneidered the chief reason for the greater 

 prevalence of thie fungus in the rarthwest. 



Polyporus schweinitAii fruits on the roots and. dead stungr-s 

 of conifers, especially of the Douglas fir, all over the forests 

 of the Western United States, but more abundantly in the Northwest 



