408 B ay liss- Elliott and Grove. — Roesleria pallida , Sacc. 
(Fig. 3), but on attempting to discover which species it was we encountered 
an unexpected difficulty : it did not agree with any of those described. We 
had met with a similar fungus before on roots of Apple and Beech, but in 
both cases it had been put down without sufficient examination as Pilacre . 
The question then arose whether it was a new species of Roesleria 
or not. By the courtesy of the authorities of Kew, we have been enabled 
to examine their specimens of Roesleria and Pilacre , viz. R. pallida , 
R. pilacriformis , P. faginea , and P. Petersii. We find all the specimens 
Fig. 3. Section through ascophore of R. pallida , after the older paraphyses forming the 
peridium have been brushed away, x 300. 
under the first two names to be exactly alike, and to agree perfectly with 
the fungus which we had in hand except in one small detail (the darker 
colour of the stems), but all of them differed from the descriptions of 
Saccardo, Rehm, Massee, Prillieux, Richon, &c., in some respect or other. 
The conclusion at which we have arrived by this inquiry is that all the three 
are R. pallida , but that the descriptions of that species require an important 
modification. 
Moreover, it became evident that it would do no violence to the facts if 
