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 Stereum rugosum
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 biennial, sometimes perennial, coriaceous,
commonly resupinate, forming orbicular or linear areas 5-8 x 3-5 cm, or pileate
when effused-reflexed with narrow upturned margins, radius seldom exceeding 5
mm; pileus surface chestnut or umber, finely tomentose, radiately striate in old
specimens; margin acute, crenate, concolorous or lighter; hymenial surface grey
with lighter margins, becoming chestnut where bruised, irregularly rugulose,
drying dingy brown, finally deeply irregularly creviced; margin lighter in
colour, fibrillose. Context wood colour, 0.5-1 mm thick, composed of one or
several zones in the hymenial layer and a dense layer of parallel hyphae
radiately arranged, bordered by a yellow cortex of cemented intertwined hyphae
bearing abhymenial hairs; generative hyphae 4-5 µm diameter, walls 1 µm thick,
without clamp connections. Conducting hyphae arising in the upper part of the
context, penetrating the hymenial layer where slightly inflated to 8 µm,
contents when fresh yellow with numerous oil globules. Hymenial layer of one or
several zones each 50-120 µm deep, upper composed of a palisade of basidia;
paraphyses, and conducting hyphae. Basidia clavate, 16-24 x 5-6 µm bearing 4
spores; sterigmata erect, slender, to 4 µm long. Paraphyses subclavate or as
often cylindrical, 16-24 x 3-4 µm, many with acute apices. Spores allantoid,
7-10 x 3-4 µm walls smooth, hyaline, 0.1 µm thick.
Habitat: HABITAT:
Commonly resupinate upon bark of dead branches.
Distribution: DISTRIBUTION: Europe,
Great Britain, North America, Australia.
Notes: Although close to S. sanguinolentum ,
typical plants may be separated by the thick, layered hymenial region, commonly
resupinate fructifications with rugulose and cinereous hymenial surface only
tardily and irregularly creviced. Crystals are embedded in the tissues at the
base of the subhymenium of each layer and may be abundant or scanty but are
always present.
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