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 Corticium protrusum
BiostatusOccurrence uncertain
Article: Cunningham, G.H. (1963). The Thelephoraceae of Australia and New Zealand. New Zealand Department of Scientific and Industrial Research, Bulletin 145: 359 p. Wellington:.
Description: Hymenophore annual, membranous,
adherent, following the substratum closely, effused forming elliptical or
irregular areas to 10 x 6 cm; hymenial surface cream, then alutaceous, finally
ochraceous, irregularly colliculose, at length sparsely creviced; margin
thinning out, white then cream, arachnoid, adherent. Context white, 100-500 µm
thick, basal layer of compact parallel hyphae, intermediate layer of intertwined
hyphae becoming more dense in the subhymenium; generative hyphae 3-4 µm
diameter, walls 0.2 µm thick, naked, branched at a wide angle, with clamp
connections. Gloeocystidia with oily, orange contents, of two types: (1) arising
from the upper part of the intermediate layer, abundant, narrowly cylindrical
with slightly tapering bases and rounded apices, not projecting, 40-70 x 5-6 µm;
(2) arising from the base of the intermediate layer, flexuous-cylindrical, to
120 x 6 µm. Hymenial layer to 70 µm deep, a close palisade of basidia,
paraphyses, and gloeocystidia. Basidia subclavate, 25-35 x 4-6 µm, bearing 4
spores; sterigmata slender, to 6 µm long. Paraphyses subclavate, 15-28 x 4-5 µm.
Spores allantoid, apiculate, 7-9 x 2.5-3 µm, walls smooth, hyaline, 0.2 µm
thick.
Habitat: HABITAT: Effused on bark of dead branches and trunks.
Distribution: DISTRIBUTION: North America, New Zealand.
Notes: Separated from C. litschaueri by the ochraceous,
colliculose surface, narrower context hyphae with thinner walls, protruding
basidia, and allantoid spores. Spores, although allantoid, are of unusual shape,
being attenuated from rounded bases to narrow apices. They were not seen in a
section from the type with which our collections agree in other features.
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