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(636
beus. I know no other Pol. acidulus and no other Pol. trabeus
than this.1) At all events it must be identical with Pol. trabeus of
Lund (Consp. Hym. p. 91) which is said to be »vulgaris» at
Stockholm. Pol. trabeus Rostk. seems to be another species, however,
as far as can be judged from his figure.
Polyporus albus.
In September 1896 I detected a white and soft fleshy-fibrous
Polyporus in a cavity of a living old tree of Fraxinus excelsior in
the avenue (»allé») at the manor-seat Sandemar about 30 km.
south-east from Stockholm. In April 1904 I sent a sample of it to
Bresadola, and he informed me that it is identical with the
species which he means under the name Pol. rubiginosus in Hym.
Hung. p. 8 (72) and also identical with Pol. albus in his Fungi
Pol. p. 73. In last August mv son brought me two specimens of
a large white Polyporus from a living tree of Populus tremula ön
an island called Asken in the archipelago of Stockholm. As I
suspected identity with the Sandemar species I went to look for
the latter again but was sorry to find that the tree had been taken
away in the meantime.
As to the name question of this Polyporus it can not be referred
to Pol. rubiginosus as the authentic specimen of the latter in Kew
Herb, seems to be identical with Pol. leporinus which is a quite
different plant. I strongly doubt that it can be Fkies’ Pol. albus
either, as Fries compares his plant with Pol. salignus and cites
Bull. t. 433. f. 1. with which my plant has no resemblance. The
surface is not »glabratus», but »villoso-scruposus» as in Pol.
epi-leucus. I therefore would rather refer my plant to this last named
species (which is unknown to me), if the description did not
dis-agree in other points. The flesh is fibrous (not »caseosus») and
the pores are white only ön fresh specimens. When drying, the
pores become at first rose-pink or incarnate and lastly sordid or
subfuscous. It does not agree either with FI. Dan. t. 1794 cited
by Fries. Being thus unable to identify it with any of the
species described I venture to considei it a »new species» and will
1 In November 1896 I found a species with rather thin sericeous pilei growing
»imbricato-multiplex» in a resiniferous wound ön a living spruce near Stockholm.
Bresadola has referred this collection to Pol. trabeus, but I am unable to agree
with him in this instance. The species must be very rare and seems to be
unde-scribed, but as I have no photo of it I witt defer the naming of it to another time.
The spores are allantoid, 0x1 u.
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