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 Hymenochaete semistupposa
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 resupinate, annual, sometimes perennial,
membranous-brittle, adherent, effused forming irregular areas 3-6 x 2-3 cm;
hymenial surface seal-brown, dark umber, or chocolate, irregularly tuberculate,
velutinate, not or tardily creviced; margin thinning out, cinnamon, fibrillose,
loosely attached. Context dark umber or sepia, 150-300 µm thick (to 800 µm in
stratose specimens), sometimes vertically fibrillose where fractured, of mainly
erect hyphae and a cortex of parallel cemented hyphae deeply coloured and
bearing abhymenial hairs of irregular length; generative hyphae 4-5 µm diameter,
walls 0.5-1 µm thick, dark yellow-brown, some submoniliform. Setal layer to 250
µm deep, composed of 2-5 overlapping rows of setae and stout erect hyphae; setae
irregularly fusiform, some projecting to 45 µm, apices acute, 40-70 x 8-12 µm,
walls naked, rich chestnut, lumena narrow. Hymenial layer to 30 µm deep, a close
palisade of basidia, paraphyses, and paraphysate hyphae. Basidia subclavate,
12-16 x 3.5-4 µm, bearing 4 spores; sterigmata slender, erect, to 4 µm long.
Paraphyses cylindrical, 18-24 x 4-5 µm, walls tinted yellow. Paraphysate hyphae
scanty, projecting to 30 µm, cylindrical, many submoniliform. Spores
suballantoid, 3.5-4 x 1-1.25 µm, walls smooth, hyaline, 0.1 µm thick.
Habitat: HABITAT: Decorticated wood of dead branches and trunks
associated with a pocket rot.
Distribution: DISTRIBUTION: Ceylon, South Africa, Australia, New Zealand.
Notes: Collections agree with the type,
part of which was examined in Kew herbarium. The species may be identified by
several unusual microfeatures, as the occasional submoniliform hyphae which,
together with normal hyphae, appear in the context, abhymenial hairs, and as
paraphysate hyphae; erect hyphae of the context; presence of a stout cortex of
parallel hyphae; delicate basidia and the monomitic hyphal system. Some of these
features vary appreciably in different collections. In the type the context
consists of a compact dense layer of parallel hyphae, the cortex, and erect
hyphae forming a loose palisade between this and the setal layer. About
one-third of the hyphae are submoniliform, a feature not mentioned by Petch. In
one New Zealand collection in which plants are somewhat immature, a dense cortex
is present, and the setal layer arises directly from this with, between setae,
erect palisade hyphae, a few of which are submoniliform. In other New Zealand
collections the context is stratose, consisting of several setal layers with
hyphae between. The latter are erect as in the type, and a few exhibit
submoniliform areas as is shown in fig. 152. Basidia and spores were not
described by Petch, nor found by Talbot (1951, p. 49). They are nevertheless
present in the type and all New Zealand collections. Basidia are delicate,
scanty, and smaller than the cylindrical coloured paraphyses.
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