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

Odontia mucronata Furukawa, Bull. Gov. For. Exp. Stn Meguro 261: 42. f. 34–35. 1974.

Hyphodontia mucronata (Furukawa) Lin et Chen, Taiwania 35: 87. 1990.

Hyphoderma rude (Bres.) Hjortstam et Ryvarden, Mycotaxon 10: 275. 1980.
   
 
 
 
 
　Description： Macroscopic characters: Basidiocarps resupinate, widely effused, easily separable, 3 × 22 cm, 1–1.5 mm thick, ceraceous, strongly cracked, having large crevices and forming separa-ble irregular shape of islands, white to ochraceous buff, not changing color in 5% KOH; margins thining out, tomentose, concolorous, white or light buff; spines subulate or cylindrical, often adhering into small groups and forming coralloid shape with crests divided at the apical portion, crowded, 72–96 μm wide at base, 144–172 μm high, with crystals cov-ered and embedded. Microscopic characters: Basal layer almost none; intermediate layer 240-528 μm thick, composed of longitudinally interwoven gelatinized hyphae, hyaline or opaque, with a cen-tral core under each spine; hyphae 2.5–3 μm wide, hyaline, thin-willed, smooth, with clamp connections; cystidia obclavate, mucronate at tips, enlarged at bases, numerous, embedded or protruding, with the contents stained by phloxine, thin-walled, 7.5–10 × 75 μm; spines embedded in masses of crystals, with encrusted, clamped, cylindrical, sterile hyphae at the tips, the sterile hyphae 4–4.5 μm wide; hymenium composed of basidia, parphyses and cystidia, arranged in palisade; basidia clavate, 7 μm wide, with 4 basidiospores; sterigmata 3 μm long; paraphyses cylindrical or clavate, 7 μm wide; basidiospores ellipsoid, somewhat flatten at one side, 4–5 × 7–9 μm, apiculate, smooth, thin-walled, non-amyloid.
 
 
 
 
 
　Specimens：

Taipei Hsien, Chungho Hsiang, Yuentong Temple, on the road side, under the hardwood forests, alt. 100–200 m, Nov. 27, 1975, S.-H. Lin (NTU-3397).
 
 
 
　Habitat： On dead stems of broad-leaved trees, associated with white rot.
 
 
 
　Distribution：

Japan and Taiwan.
 
 
 
　References：

Lin, SH. and Chen, ZC. 1990.
   
   
   
　Provided：

S. H. Lin
 
 
　Note： The species established by Furukawa (1974) is characterized by the strongly cracked basidiocarps and the mucronate apex of cystidium. However, the apex of cystidium in our material is not often so mucronate. And the cystidia are mostly immersed in the context, rarely protruding. Additionally, the central cores in the middle parts of the context under each spine, which may be the primary centers of development of spines, are very conspicuous.