Phylum：Basidiomycota　>>　Class： Basidiomycetes　>>　 Order： Polyporales 
   
 
　BCRC Number： NO BCRC Number!  
   
　Scientific Name： Hyphodontia dimorpha
 
   
   
　Author：

Hyphodontia dimorpha Lin et Chen, Taiwania 35: 84. 1990.
   
 
 
 
 
　Description： Macroscopic characters: Basidiocarps resupinate, widely effused, adnate, 400 μm thick in-cluding spines, 3–7 × 23 cm, membranaceous, finely but not completely cracked, odontoid to densely toothed, white, catridge buff, ivory buff or pale pinkish buff, not changing color in 5% KOH; margins thining out, with distinct young spines on farinose surface, white or concolorous; spines 70–250 μm wide at base, 70–120 μm long, cylindrical to conical. Microscopic characters: Basal layer of context distinct, 70 μm in thickness, mostly composed of parallel hyphae, with distinct basal hyphae up to 5 μm wide, sometimes with short cells, 5 × 6 μm, thin-walled; intermediate layer of context thick, 200–240 μm in thickness, composed of vertically ascending hyphae; hyphae 2–3.5–(4) μm wide, rarely 5 μm wide at the basal layer, with simple septate, sometimes constricted at septa, thin-walled, smooth, often with short cells, 5 × 6 μm at basal layer, without clamp connections; cystidia with two types; the one fusiform or ventricose, finely encrusted, sometimes one-septate, 5–15 μm wide at intermediate layer, 11–17 μm wide at basal layer, 35 μm long, thin- to thick-walled, with the wall up to 7 μm wide, embedded abundantly in intermediate layer, with the crystals dissolved in 5% KOH, sometimes arranged in fan-shaped, often smooth, large, old, thin- to thick-walled, ovate at the basal layer, protruding at the hymenial surface; the other cylindrical, rounded at apex, thin-walled, more or less of the sterile generative hyphae, fimbriate and protruding at the apex of spines, septate, without clamp connections, very scarcely finely encrusted, 5–5.5 μm wide, projecting 30 μm high, confined to the apex of spines; hymenium 15–20 μm thick, densely arranged in palisade, not present in the apex of spines; basidia 3.5–3.8 × 15 μm subclavate to cylindrical, with 4 basidiospores ellipsoid, 1.2–1.8 × 3–3.2 μm, thin-walled, smooth, non-amyloid.
 
 
 
 
 
　Specimens：

Taipei Hsien, Wulai Hsiang, Doll Valley, on the road side, under the hardwood forests, alt. 300–400 m, Dec. 25, 1975, S.-H. Lin (Holotype: NTU-4303).
 
 
 
　Habitat： On the dead stems and branches of the broad-leaved trees.
 
 
 
　Distribution：

Taiwan.
 
 
 
　References：

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

S. H. Lin
 
 
　Note： The cystidia of this species also have two forms. One is cylindrical, thin-walled, scarcely encrusted, confined only at the apex of spines and forming a fimbriate tip of the typical character of spines. The other is fusiform, finely encrusted, thin- to thick-walled, protruding and embedded, forming the main aspect of the context. In the apical portion of the spines, several intermediate cystidia have the shape between the cylindrical and the fusiform, the fusiform cystidia are thin-walled, septate, and slightly encrusted. Consequently, the cylindrical cystidia are likely to be the initial stage of the fusiform cystidia. The septa found at the fusiform or ventricose cystidia may explain that the two cystidia are identical.