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 Stereum illudens
SynonymsXylobolus illudens
Stereum pannosum
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 or perennial, coriaceous, sessile. Pilei
effused-reflexed, flabelliform, umbonate, or resupinate, often laterally connate
with a broad resupinate base and reflexed margins, 1-3 cm radius, 1-15 cm wide;
pileus surface chestnut or vandyke-brown with a greyish base, coarsely
strigose-hirsute, concentrically sulcate and zoned with various shades of brown
hairs, sometimes complicate with lateral margins infolded, frequently radiately
sulcate; margins acute, plane, concolorous or darker, entire; hymenial surface
showing irregular zoning and sulcate markings of the surface, even, plum,
violaceous, or lead colour, or tinted heliotrope or violet, finally deeply
creviced often around the centres of attachment. Context ferruginous or fuscous,
sometimes stratose, 0.3-1 mm thick, commonly 0.3-0.5 mm, of radiately arranged
parallel hyphae, with a coloured cortex beneath abhymenial hairs and a colour
zone beneath the hymenial layer; skeletal hyphae 4-6 µm diameter, walls 1 µm
thick, tinted yellow-brown, darker when old; generative hyphae 2.5-3 µm
diameter, walls 0.2 µm thick, hyaline, without clamp connections. Acanthophyses
projecting slightly, fusiform or cylindrical with acuminate or rounded apices,
4-5 µm diameter, bearing on the apical region 5-15 digitate processes 0.5-4 µm
long. Hymenial layer to 50 µm deep, a dense palisade of basidia, paraphyses,
acanthophyses, and cystidioid hyphae. Basidia subclavate, 24-30 x 5-6 µm bearing
4 spores; sterigmata erect, slender, to 6 µm long. Paraphyses subclavate, 10-16
x 3.5-4 µm. Cystidioid hyphae traversing the hymenial layer, scarcely
projecting, apices rounded or acuminate, to 8 µm diameter, walls 1-5 µm thick,
in the base of the hymenium many inflated to 10-16 µm with walls thickened to 4
µm, contents inconspicuous. Spores elliptical or suballantoid, apiculate, 7-9 x
2.5-4 µm, walls smooth, hyaline, 0.2 µm thick.
Habitat: HABITAT: Effused on
bark or decorticated dead trunks and branches, often on upright power poles or
worked timber.
Distribution: DISTRIBUTION:
Australia, Tasmania, New Zealand.
Notes: Collections agree with the
type in Kew herbarium, ex "Swan River, Western Australia, No. 158". The species
may be identified by the pallid brown context with rich chestnut cortex,
coarsely strigose hirsute surface and presence of acanthophyses and cystidioid
hyphae in the hymenial layer. Collections vary, exhibiting three main growth
forms: (1) large effused-reflexed or flabelliform plants often laterally
connate, common on fallen trunks and branches; (2) small flabelliform or
umbonate plants common on power poles, or upright stems of shrubs; and (3)
resupinate forms common on worked timber such as handrails, boxing, and
flooring, in which the fungus produces a destructive decay. In the first,
acanthophyses are delicate, bearing spines which rarely exceed half a dozen in
number and 0.5 µm in length; in the second, prominent, bearing numerous spines
which may reach a length of 4 µm and exceed a dozen in number, in the third they
may be delicate or well developed. Usually the surface is strigose-hirsute,
chestnut, concentrically sulcate and zoned with several shades of brown hairs,
the basal portion being less hirsute and often grey. Hairs may partly disappear,
exposing zones of dark cortex, or be shed completely, when the surface appears
polished and black. Colour of the hymenial surface also varies appreciably: when
fresh it may be light pinkish-buff, plum, or tinted violet or heliotrope; old
specimens usually weather to lead or ashy grey, and become deeply creviced,
often more prominently around the point of attachment. Some plants are stratose,
bearing from two to five layers with receding margins. Resupinate plants, common
on worked timber, in appearance resemble resupinate specimens of S.
fasciatum but differ in possessing acanthophyses.
Article: Cooke, M.C. (1879). New Zealand fungi. Grevillea 8(46): 54-68.
Notes: Effused for three or four inches, with the margin torn and split, separable, slightly reflexed
above and villons. Entirely cinereous.
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