218 Rhodora IDECEMBER 
CLASSIFICATION. 
The history of Fomes roseus has not been so much in dispute. As 
far as the writer has been able to determine, the original collection 
does not exist. The location of the herbarium of Albertini and 
Schweinitz appears to be unknown. Fomes roseus occurs frequently 
in Europe and is typical in spore and other characters of the plant 
in America. Trametes subrosea is rare in Europe and on that account 
the question as to which species Albertini and Schweinitz originally 
had before them cannot logically be raised. Both may become 
thick, ungulate and stratified or they may be thin and applanate. 
The species are quite distinct, however. Ready means of distinction 
in the field are the darker-colored context, and the conspicuous narrow 
zonate and radiate fibrillose surface of the pileus of Trametes subrosea. 
The context may become reddish brown to brown in very old speci- 
mens. ‘The context of the original American specimen in Berkeley’s 
herbarium is almost brown, so that Cooke was practically correct 
in listing it under *rhabarbarino-ferrugineo." The zonate condition 
of the pileus is often obscured by a revival of growth during very wet 
weather so that it often appears soft and smooth. The pores have a 
tendency to become discolored with age especially when the sub- 
stratum is about exhausted. Such specimens are often thin and 
applanate and may lead to the conception that the plant is annual. 
The pores may be conspicuously stratified in old specimens. Fre- 
quently the plant is ungulate. The rather narrow ellipsoid to cylin- 
drical hyaline spore has a constant tendency to be allantoid and quite 
regularly so in occasional specimens. This condition very readily 
distinguishes the species from Fomes roseus, the spores of which never 
tend to become allantoid, average broader and are frequently acu- 
minate atoneend. In contrast to the normally fibrillose zonate pileus 
of Trametes subrosea, that of Fomes roseus is normally smooth without 
markings, frequently conspicuously sulcate, and may be rimose in 
very old specimens. The context is constantly of a lighter color in 
normally developed specimens. The older pores are usually filled 
with a whitish deposit and are more styptic. 'The pores may be 
stratified or not, depending upon the age of the specimen. In 
America, Fomes roseus, as far as known, is confined to coniferous wood. 
Trametes subrosea occurs on both hard woods and conifers and is more 
