204 SALMON. : SUPPLEMENTARY 
Proceeding to European material we may notice first that in 
some specimens of P. corylea on Corylus Avellanaa slight but dis- 
tinct branching is found in some of the penicillate cells. I have 
seen this in specimens from Surrey, England (f/. zz, 7.7), and in 
the specimens in Briosi e Cavarra, Fung. par. no. 170, from Italy. 
Ina specimen on Corylus Colurna from Copenhagen most of the 
stem-cells are branched at the apex in the manner shown at /é. 
11, f. 8. The same occasional branching is found in some speci- 
mens on A/nus, e. g.,in Fckl. Fung. Rhen. no. 704 (pl. rz, f. 11) 
The degree of branching gradually increases until we find forms 
like that which occasionally occurs on Betula alba (see pl. 11, 
f. 9, 10) from Germany in which the branching is as ‘clava- 
rioid’’ as that found in the South American “ P. clavariaeformis.” ° 
In certain specimens occurring on Alnus glutinosa (see pl. 11, 
f. 12, 13) drawn from a French example we find an elongated 
stem-cell, up to 80 long, as is usually the case in P. clavariae- 
Sormis (cf. pl. 9, f. 1-5). In a specimen on Cornus Mas from 
Italy (in Sace. Myc. Ven. no. 625), several cells branched in the 
manner shown at f/. zz, f. 1g, were found on the same peri- 
thecium amongst quite simple ones. 
In most Japanese examples of P. corylea the penicillate cells 
were found to be unbranched, but here, as apparently everywhere 
in the geographical range of the species, occasional forms occur 
with a ‘clavarioid’’ branching. In specimens on Magnolia con- 
spicua (M. Yulan), we find branched and unbranched cells in about 
equal number on the same perithecium (see f/. 17, f. 77-79): In 
the large form of P. corylea on Paulownia imperialis (see mono- 
graph, p. 233) the stem-cell may reach to a height of 110 y, and 
be either branched or unbranched. (See pl. rz, fi 15-16.) 
Distinctly branched penicillate cells also occur, intermixed with 
unbranched ones, on Japanese examples of P. corylea or Alnus 
incana var. glauca and on Broussonetia papyrifera. 7 
We must conclude, I think, from the evidence given above, 
that P. clavariaeformis has no claims to be considered a distinct 
species, but that it is merely a form of P. corylea which appeats 
occasionally—and certainly not confined to any definite host-plants 
—throughout the geographical range of this species, and that more~ 
over it is a form which merges imperceptibly into typical P. corylea 
