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 Antrodia xantha
SynonymsPoria xantha
Polyporus xanthus
BiostatusPresent in region - Exotic
Article: Cunningham, G.H. (1965). Polyporaceae of New Zealand. New Zealand Department of Scientific and Industrial Research, Bulletin 164: 304 p. Wellington:.
Description: Hymenophore annual or perennial when stratose, adherent,
ceraceous, brittle, effused forming linear areas 5-12 x 3-5 cm, 1-3 mm thick.
Hymenial surface even, pallid cream, or sulphur yellow, when dry creviced,
sometimes nodulose; margin irregular; lighter in colour, 2 mm or less wide,
adherent, thinning out, fibrillose. Pores in strata, or not, round or angular,
5-6 per mm, 120-200 µm diameter, to 1.5 mm deep in each layer, dissepiments
200-275 µm thick, even, equal. Context pallid cream, 200-350 µm thick, of
intertwined hyphae embedding crystals; skeletal hyphae 3.5-4 µm diameter, walls
to 1.5 µm thick, aseptate, sparsely branched; generative hyphae 1.5-2 µm
diameter, walls 0.2 µm thick, branched, septate, with abundant clamp
connections, frequently encrusted with mucilage granules. Hymenial layer to 25
µm deep, a dense palisade of basidia and paraphyses. Basidia subclavate or
cylindrical, 10-14 x 3.5-4 µm bearing 4 spores; sterigmata erect, to 4 µm, long.
Paraphyses subclavate or cylindrical, sometimes obovate, 8-12 x 3-3.5 µm. Spores
allantoid, 3.5-4.5 x 1-1.5 µm, walls smooth, hyaline, 0.1 µm thick.
Habitat: HABITAT: Bark or decorticated wood of standing stumps,
trunks, and worked timber, associated with a brown rot.
Distribution: DISTRIBUTION: Europe, North America, Australia, New Zealand.
Notes: Specific features are the sulphur colour of the fragile
hymenophore, moderate size of pores, thick dissepiments, allantoid spores, and
usually one layer of pores. In two collections growing vertically on stumps,
pores are stratose and arranged in small knobs as if plants were pileate. This
condition has been named P. xantha forma pachymeres J.
Eriksson (1949, p. 22). The species causes a destructive decay of building
timbers, wood used in boat construction, and the like. Lowe (1958, p. 104)
listed as additional synonyms P. greschkii Bres. and P.
sulphurella (Peck) Sacc.
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