Lloyd Mycological Writings V4.pdf - MykoWeb

SPORES HYALINE.
fragile. Pores small, round, drying slightly alutaceous. Spores allantoid,
1 x4-5, cylindrical, curved.
This is the most abundant species we have in this section in the
United States, on birch usually. It occurs in Europe, but is very rare.
When fresh it has a slightly acrid odor. It accords very well with
Fries' account of Polyporus chioneus in Myc. Europ., and is so referred
by Karsten and Romell. However, it does not accord with description
of the original Polyporus chioneus, and the name having been applied
to different plants, we adopt Peck's name, which is the only certain
one. The surface is smooth, not "anoderm," but the crust is so thin,
a section under the microscope is necessary to clearly show it. It is
only about 50 mic. thick. Polyporus albellus is distinguished from
the plant we call Polyporus trabeus (cfr. page 301) only by its thin
crust. They are, no doubt, extreme forms of the same species.
SPECIMENS. Many from United States. From Romell, Maire, and perhaps one or two others
from Europe.
Compare acriculus, palustris.
POLYPORUS PORTENTOSUS. Pileus usually large, 3-4
inches in diameter, 2-3 inches thick. Surface with a distinct, thin, pale
yellowish crust. Flesh pure white, fragile, chalky. Pores minute,
pure white.
This is only known from Australia. It is a species quickly destroyed
by insects, and the type at Kew is almost gone. We have the
only good collection known, which was from Geo. K. Hinsby, Australia.
A good account of this species is given in Cooke's Handbook.
As to context, it is quite close to Polyporus immaculatus, but readily
distinguished by its distinct crust. This is the largest, white Polyporus
known. It is recorded as large as ten inches in diameter.
SPECIMENS. Australia, Geo. K. Hinsby. The only good collection in any museum.
POLYPORUS TEPHRONOTUS. Pileus dimidiate, thin, 5-6 mm. Surface
smooth, with a thin, but distinct crust, slightly yellowish. Flesh white, soft, brittle.
Pores very minute, discolored slightly, with a waxy appearance. Spores not found
(allantoid?). This is only known from the type at Kew. There are several collections
from Australia, and a large portion of them are semiresupinate. The pores
remind us much of those of Polyporus semisupinus.
Compare angustus.
POLYPORUS ELATINUS. Sessile, but attached by a reduced base (4 x
3x1 cm.). Surface with a thin but evident crust, smooth, wrinkled in drying,
reddish, ochraceous color. Flesh white, firm, 3-5 mm. thick. Pores small, round,
slightly discolored (now), with mouths darker, 6-8 mm. long. Spores abundant,
subglobose, hyaline, smooth, 6-7 mic., many smaller, 3-4 mic. Known at Kew
from good types, India.
POLYPORUS ORINOCENSIS. Compare our Synopsis Hexagona, page 36. Has small
pores, but is so closely related to the large-pored species (Hexagona cucullata) that we figured it in
connection with that species. It is known from but one collection from South America, at Pans,
and is probably only a small-pored form of Hexagona cucullata. If ever found again, it might be
sought in this section of Polyporus.
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