6 Wood Discoloration

228 8 Habitat of Wood Fungi
Strands: white to grey-brown, about 1 mm in diameter, microscopic characteristics
similar to S. lacrymans.
Leucogyrophana mollusca, Soft dry rot fungus
Fruit body (Fig. 8.21k): resupinate, orange to yellow-brown; old: grey-blackish;
white, cottony-frayed margin; 1–2 mm thick, to a few decimeters wide, easily
separable; hymenophore merulioid, tooth-like elevations; uneven, brownviolet
to grey-black sclerotia (Fig. 8.21m), 1–6 mm, often in groups; yellowishbrown
spores 6−7.5 × 4−6µm;
Strands (Fig. 8.21l): hair-like, first cream-yellow, soon brown-black, below
1 mm thick, separated from mycelium (“barked”), flexible when dry, fragile
when old; no fibers; vessels up to 25µm thick, numerous, in groups, with
bar-thickenings.
Leucogyrophana pinastri, Mine dry rot fungus, Yellow-margin dry rot fungus
Fruit body (Fig. 8.21f, g): resupinate, first yellow-orange, then olive-yellow to
brown, grey-black when old, to 1 m wide, hymenophore merulioid to irpicoid
to hydnoid; round-oval, brown-black sclerotia to 2–3 mm thick; hyaline to
yellowspores5−6×3.5−4.5µm;
Strands: first yellowish, then grey-brown (Fig. 8.21h), hair-thin, separated
from mycelium; no fibers; vessels to 15µm thick, numerous, in groups, with
bar-thickenings.
Leucogyrophana pulverulenta, Small dry rot fungus
Fruit body: resupinate, first sulphur-canary yellow, then (Fig. 8.21n) oliveyellow
to cinnamon-brown, also grey-black when old, white, indistinct margin,
to 20 cm wide; hymenophore smooth to merulioid, no sclerotia; hyaline to
yellow, thick-walled spores 5−6 × 3.5−4.5µm;
Strands (Fig. 8.21o): white, to 2 mm thick, not clearly separated; no fibers;
vessels to 20µm thick, numerous, in groups, bar-thickenings indistinct or
absent.
Meruliporia incrassata, American dry rot fungus
Fruit body: similar to S. lacrymans, annual, resupinate to effused, 20 cm or
more in length, thin, easily separable, whitish to buff margin, grey center,
becoming darker as it matures; 1 to 12 mm thick, fleshy, brittle when dried;
first appearing as a felted pad of mycelium with formation of pores beginning at
the center, subsequent fertile to the margin; hymenophore poroid, occasionally
merulioid; whitish to buff or ochre-grey when fresh, grey-brown to black when
drying, unequally circular to angular pores, 1–3/mm; monomitic; thick-walled
oblong to ellipsoid spores, variable in size, 8−16 × 4−8µm;
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