Phylum:Basidiomycota >> Class: Basidiomycetes >>  Order: Polyporales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Hyphoderma setigerum

Odontia acerina Peck, N.Y. State Mus. Rep. 53: 847. 1901.

Peniophora setigera (Fr.) Höhn. Et Litsch., Annls Mycol. 4: 289. 1906.

Kneiffia setigera (Fr.) Fr. Epicrisis, Syst. Mycol. (Uppsala), p. 529. 1838.

Thelephora aspera Pers., Myc. Eur. 1: 153. 1822.

Thelephora setigera Fr., Syst. Mycol. (Uppsala), p. 529. 1828.

Odontia setigera (Fr.) Miller, Mycologia 26: 19. 1934.

Corticium berkeleyi Cooke, in Mass., Journ. Linn. Soc. Bot. 27: 133. 1890.

Peniophora aspera (Pers.) Sacc., Flora Italica, Cryptogamia 1: 1182. 1916.

Hyphoderma setigerum (Fr.) Donk, Fungus 27: 15. 1957.

 Description: Macroscopic characters: Basidiocarps resupinate, effused, adnate, 100–200 μm thick, 300 μm thick when including spines, 1.2–1.5 × 2–9 cm, not cracked, indurate or odontoid, white, light buff, cream color or colonial buff, not changing color in 5% KOH, pelliculose, mi-nutely granulate; margins thining out, pruinose, concolorous; spines conical. Microscopic characters: Basal layer without parallel hyphae, if any, extremely loose, and very scanty, mostly slowly ascending; intermediate layer of context with loosely wovened hyphae at base, gradually dense and longitudinally interwoven upwards; hyphae of basal layer of context 3–6 μm wide, thick-walled, with clamp connections; hyphae of intermediate layer of context 2.5–3–4.5 μm wide, cylindrical, sometimes slightly ampoullaceous, thin-walled, smooth, distinctive, with contents turning brown color in Melzer's reagent, having abundant clamp connections, branching in narrow angles; cystidia easily stained by phloxine especially when young before projecting, confined to the spines in axile, protruding 17.5–37.5 μm high, arising from the basal hyphae, 63–150 μm long, 6.2–7.5 μm wide, septate or with clamp connections, slightly encrusted, 7.5–8.8 × 10–17.5 μm each cell, cylindrical, straight, rounded or obtuse at apex, thin-walled; hymenium 30 μm thick, with basidia and paraphyses arranged in palisade; basidia 20–27 × 5–7 μm, clavate but con-stricted near apex, with 2–4 basidiospores; paraphyses cylindric, swelling at middle portions, 4.5–5 × 25–27 μm, 1-guttullate; sterigmata curved, l–1.5 × 4–6.5 μm; basidiospores oblong or ellipsoid to cylindrical with rounded apices, apiculate, 3–4.5 × 5–11 μm, 1-guttulate, thin-walled, smooth, non-amyloid.

Kaohsiung Hsien, the Southern Cross-Island Highway, Mt. Mei, under the hardwood forests, alt. 900 m, Jan. 24, 1975, S.-H. Lin (NTU-2391); Nantou Hsien, Wuso, Meifung, under the pine forests, alt. 2000 m, Nov. 1, 1975, Z.-C. Chen (NTU-3582); Taitung Hsien, Lanyu Hsiang, on the road side, under the tropical hardwood forests, alt. 50–200 m, Aug. 24, 1975, S.-H. Lin (NTU-3916); Taipei Hsien, Mt. Yangming, under the harwood forests, alt. 500 m, Dec. 27, 1975, S.-H. Lin (NTU-4258).

 Habitat: On the dead branches of the broad-leaved trees, associated with white rot.

Europe, Great Britain, North America, Australia, New Zealand, USSR, Japan and Taiwan.


Lin, SH. and Chen, ZC. 1990.


S. H. Lin

 Note: According to the reports of Slysh (1960), Cunningham (1963) and Hayashi (1974), the variational scope of the species seems to be very broad, which may coincide with its cosmopolitan distribution. Our materials also show the same case. We follow the opinion of Donk (1957) and accept the concept of the genus Hyphoderma Wallroth (1833) which was emmended by Donk in 1957. The hymenophore varies from smooth to odontoid. The encrusted cystidia of the species are only present in spines. These characters show the species itself to be an intermediate form of both genera Hyphoderma and Odontia. Price (1973) in his study of the morphology of resupinate Aphyllophorales and their development of the cystidia, hyphae, basidia and whole fructifications, concluded that the mature fructifications of Hyphoderma setigerum are often slightly hydnoid, and said that this may result from the fructifications building up around a projecting cystidium. Although the spine appears odontoid, the protruding hyphocystidia remain dissociated from the sterile hyphae by which the typical fimbriate tips of spines are organized. And even if the hyphocystidia are associated with climbing hyphae and forming odontoid spines, they still can not belong to the typical ones, because the occurrence of the sterile climbing hyphae is fundamentally different from that of the sterile hyphae in typical odontoid spines.