Lloyd Mycological Writings V4.pdf - MykoWeb

SPORES HYALINE. SETAE PRESENT.
SECTION 70. CONTEXT BROWN. SETAE PRESENT. SPORES HYALINE.
A. Context Light Brown.
FOMES POMACEUS (Fig. 588). Pileus half unguliform, but
usually more inclined to take a subresupinate form with the pileus
imperfectly developed. Surface at first fulvous, tomentose on the
margin, later cinereous, after wintering turns dark, but not black as
Fomes igniarius. Context fulvous brown (Amber brown), intermediate
between the color of context of Fomes igniarius and Fomes
robustus. Pores minute, round, annual layers 5-6 mm. Setae usually
abundant, with thickened base, projecting 12-16 mic. Spores globose,
hyaline, 5-6 mic.
Fig. 588.
Fomes pomaceus.
Komes pomaceus is a frequent plant in Europe, usually on the plum trees
(Prunus). In fact, in England it is a distinctive disease of the plum. It occurs in
Europe also on cherry and other allied cultivated trees, but never, I believe, except
on trees of the Rosaceous family. With us in the United States I only know it on
wild species of Prunus. I have never noted it on cultivated plums.
Persoon had a clear idea of Fomes pomaceus, as is evident from his specimen
and writings, and he seems to have been the only one who had until recent years.
Fries held it as a variety of Fomes igniarius, and his description of igniarius was
drawn partially from this plant. Schroeter confused it with Fomes igniarius. Berkeley
always referred it to Fomes igniarius, and those who followed Berkeley in England
have apparently never learned the difference. Quelet got it right. Bresadola discovered
that it was Fomes fulvus of Scopoli, being one of six different men who
have interpreted Scopoli's vague writings, each one with a different species. Murrill
copied Bresadola. It was the basis of Fomes supinus (sic) in Morgan's work.
ILLUSTRATIONS. If it has been illustrated, it has been under the name of igniarius or tulvus
probably. I have not bothered to look them up.
SPECIMENS. Many from Europe, mostly on plum trees. Many from the United States on
wild plum. Foreign, Madeira, Carlos A. de Menezes, exactly as in Europe. Australia, Edmund
Jarvis, specimen doubtful, cfr. Letter 37.