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 Podoscypha nitidula
SynonymsStereum surinamense
Stereum nitidulum
BiostatusPresent in region - Origin 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
pileate, annual, coriaceous, usually solitary, sometimes one or two fusing at
margins but distinct below. Pilei centrally stipitate, infundibuliform,
sometimes campanulate, 5-45 mm tall, 15-30 mm wide; pileus surface glabrous or
with a few hairs towards the base, chestnut to umber, usually with alternating
light and dark brown colour bands, concentrically arranged, frequently radiately
zoned or grooved and occasionally radially striate; hymenial surface decurrent,
concolorous with the surface, reflecting surface zones, with or without a
delicate, bloom, even or longitudinally fissured when dry; margin lighter in
colour, bay or tan, thinning out, erect or revolute, entire or crenate. Stems
cylindrical or tapering, arising from broad mycelial discs, to 15 x 2 mm, dark
brown or black, naked or delicately velutinate. Context wood colour, 200-450 µm
thick, increasing in thickness from apex to base, a dense layer of radiately
arranged parallel hyphae bordered by a narrow cortex usually, coloured brown and
composed of parallel cemented hyphae; abhymenial hairs wanting; skeletal hyphae
4-5 µm diameter, lumena capillary; generative hyphae 2.5-3 µm diameter, walls
0.2 µm thick, with clamp connections. Gloeocystidia arising in the upper part of
the context and subhymenium, flexuous-cylindrical or more often ventricose with
inflated bases, penetrating the hymenium to its surface, 40-65 x 6-10 µm,
sometimes inserted at an angle. Hymenial layer to 70 µm deep, a dense palisade
of basidia, paraphyses, and gloeocystidia. Basidia subclavate, 16-20 x 4-4.5 µm,
bearing 2-4 spores; sterigmata erect, slender, to 3 µm long. Paraphyses
subclavate, 12-15 x 3.5-4 µm. Spores broadly elliptical, 3-3.5 x 2-2.5 µm, walls
smooth, hyaline, 0.1 µm thick.
Habitat: HABITAT: Solitary or
gregarious upon bark of dead fallen branches.
Distribution: DISTRIBUTION: South America, West
Indies, Fiji, Cook Islands.
Notes: Fructifications are usually solitary and
infundibuliform or campanulate, pileus surfaces are glabrous, concentrically
zoned with bands of light and dark brown, and hymenial surfaces are even. The
narrow, tinted cortex is without abhymenial hairs. Stems are velutinate and
attached to the substratum by broad mycelial discs. Gloeocystidia are
ventricose-flexuous and conspicuous. Spores are the smallest of those seen in
stipitate species, and readily overlooked unless sections are examined with an
oil immersion objective.
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