Roesleria pallida, Sacc. 1 
BY 
JESSIE S. BAYLISS-ELLIOTT, D.Sc., 
AND 
W. B. GROVE, M.A. 
With eleven Figures in the Text. 
AT the end of the year 1915 we obtained from Sutton Coldfield a number 
jL\. of specimens of a fungus which was considered at first sight to 
be Pilacre Peter sii ; they were growing on the roots of a willow (Fig. 1) 
which had died at the end of autumn, after passing through a period of 
Fig. 1. Ascophores of 
Roesleria pallida on the roots 
of Willow (nat. size). 
Fig. 2. Vertical median (microtome) section 
of an ascophore, showing the hemispherical hy- 
menial disc, x 120. 
gradual exhaustion during the preceding summer. It is a natural inference 
that the fungus was the cause of death. On closer examination the spores 
were seen to be in asci, and the fungus was obviously a species of Roesleria 
1 Mich. ii. 299. 
[Annals of Botany, Vol. XXX. No. CX 1 X. July, 1916.] 
F f 
