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 Corticium vescum
BiostatusPresent in region - Indigenous. Non endemic
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, arachnoid or pelliculose, adherent, effused forming
linear areas to 20 x 4 cm; hymenial surface white, delicately pruinose, not
creviced; margin arachnoid, white, adherent. Context white, 10-60 µm thick,
basal layer of parallel compact hyphae, intermediate layer wanting; generative
hyphae 1.75-2 µm diameter, walls 0.2 µm thick; naked, with clamp connections.
Hymenial layer 15-20 µm deep, a scanty palisade of basidia and paraphyses.
Basidia subclavate, 10-12 x 3-4 µm, bearing 4 spores; sterigmata delicate, to 4
µm long. Paraphyses obpyriform, ovate, or cylindrical, 5-8 x 3-3.5 µm. Spores
allantoid, 3-4 x 1-1.5 µm, walls smooth, hyaline, 0.1 µm thick.
Habitat: HABITAT: Effused on bark
of dead branches and dead stipes of tree ferns.
Distribution: DISTRIBUTION:
North America, New Zealand.
Notes: In C. vescum the hymenophore develops
as a tenuous white, sometimes pelliculose film attached firmly to the
substratum, following closely its irregularities and resembling a light grey
wash of water colour. The context is usually scanty, consisting of a few mainly
parallel hyphae which soon collapse and become partly gelatinised; in some
collections it may attain the thickness of 50 µm. An intermediate layer is
wanting, the hymenium arising from short branches of the basal layer. Obpyriform
or ovate paraphyses are common and form the bulk of the hymenial layer. In the
collection from Rubus cissoides most paraphyses are obpyriform or
ovate, whereas in those from Neopanax colensoi and Myrsine
australis they are ovate, pyriform, cylindrical or subglobose.
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