Lloyd Mycological Writings V4.pdf - MykoWeb

SPORES HYALINE. SETAE PRESENT.
difference in the color of the context of the two species. If Persoon or Fries met the
plant, they never noticed the difference. It is only recently that attention was
drawn to the fact that the plant on oak, called Fomes igniarius by the French botanists
to this day, is quite different from the plant on willow called Fomes igniarius
by Fries. Mr. Romell first brought it to my notice. Hartig (in 1878) figured under
the name Polyporus fulvus a Fomes on the silver fir (Abies pectinata). It has been
distributed from Italy as Fomes igniarius var. Abietinus. It was afterwards called
Fomes igniarius var. Pinuum and Fomes Hartigii. Notwithstanding the vastly
different host, it seems the same as Fomes robustus in all characters. I think Fomes
robustus is only known in Europe on oak and silver fir. In America the name does
not figure in our literature, being unknown to those who have worked here on the
subject. It is not known to me east of the Mississippi. A form (called Fomes
Bakeri) is said to be quite common on birch in Minnesota regions. From Texas
I have seen the type form of Europe on mesquite (and referred in error to Fomes
texanus). I have it from California, H. S. Fawcett, on Eucalyptus.
The foreign specimens I have are from Australia, Hawaii, and Japan. A few
have setae and spores a shade larger (8-9 mic.), but otherwise are exactly the same
as the European form. Compare Fomes setulosus in Section 70,
ILLUSTRATIONS. Hartig, Zersetz. d'Holzes t. 7, (as PoLyporus fulvus in error). In his
Diseases of Trees, this is referred to as Polyporus, Hartigii).
SPECIMENS. Many from Europe, mostly from France, on oak; also from Alpine regions,
on the silver fir. I have seen none from England. From United States, only California. H. S. Fawcett,
on Eucalyptus; Hawaii, C. N. Forbes; Australia, A. G. Hamilton, on Eucalyptus; Japan, A. Yasuda.
Forms.
FOMES BAKERI is a form of Fomes robustus, very close in its bright rhei
context color, spores, etc. (6-7 mic. rather than 5 mic., as described), and which
differs only in its surface, which is smooth, subconcolorous, without the black, rimose
crust of the type. Museum specimens are only known to me from the originals in
Ellis' herbarium, and in my own, frpm C. F. Baker, Wisconsin. I am told by Prof.
Harper it is common on birch in Minnesota.
NOTE. The plant distributed by C. F. Baker, No. 54, on Betula, Los Pinos, Colorado, and
determined by Underwood as Polyporus applanatus (sic), has same general appearance and surface
as Fomes Bakeri, but differs markedly in context color, and in having abundant setae. I should refer
it to Fomes pomaceus, although it differs slightly.
FOMES SETULOSUS. Pileus ungulate, with a smooth, brownish
surface. Context fulvous (tawny of Ridgway), hard, woody, the
pore tissue a shade lighter than the context. Pores very minute, with
brown mouths. Pore layers 2-3 mm. wide. Spores globose, hyaline,
8 mic. Setae very abundant, with thick bases, and abruptly contracted
and slender points, projecting 12-14 mic.
We base this name on species received from Ceylon, which are
close to Fomes robustus, and when received were referred as a setaebearing
form of it. On comparing the context color, however, I find
it distinctly different, the difference shown in Ridgway's tawny and
yellow ochre on plate XV. In addition, it has quite peculiar and very
abundant setae, found but rarely, if at all, on the European plant.
There seems to be an intermediate plant in Australia closer to the
European plant.
FOMES TORULOSUS. Pileus applanate, sometimes thin, an
inch or less thick; other specimens are 3-4 inches thick. Surface when
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