94 
Mycologia 
5-10 11, the concolorous, tapering stalk often reaching 50 n in 
length, but narrower than the projecting portion. 
Type collected on a trunk of Thuya plicata at Priest River, 
Idaho, in the Kaniksu National Forest, in 1912, by James R. 
Weir. Common throughout the northwest, according to Mr. 
Weir, and confined to Thuya plicata. Younger stages would be 
referred to Fuscoporia, and the older stages sometimes have 
rather the appearance of “ reviving ” from year to year instead of 
being truly perennial, as is the case in most species of Fomitiporia. 
For the benefit of those using Saccardo’s nomenclature, the species 
is here recombined as Poria Weirii Murrill. 
New York Botanical Garden. 
Explanation of Plate CXXII 
Fig. 1. Fomitiporia Weirii as it appears normally, and also when reviving 
and a new layer of tubes is being formed. 
Fig. 2. Initial stages in the decay caused by the above species, showing the 
separation of the annual rings of the host. 
