Phylum：Basidiomycota　>>　Class： Basidiomycetes　>>　 Order： Boletales 
   
 
　BCRC Number： NO BCRC Number!  
   
　Scientific Name： Tylopilus vinosobrunneus
 
   
   
　Author：

Tylopilus vinosobrunneus Hongo, Beihefte zur Sydowia 8: 198. 1979.
   
 
 
 
 
　Description： Pileus 2-8 cm broad, convex to broadly convex, nearly plane when old; surface matted-fibrillose, slightly viscid but dry when old; color purple-brown to vinaceous-brown when young, orange-brown to black when old, brown when bruised; context whitish, un-changing when cut, odor slight, taste bitter. Tubes 0.3-0.7 cm deep, pallid, wood-brown or darker at the pallid stage, staining wood-brown when bruised, adnate or depressed around the stipe; pores very small (2-3 per mm), pallid when young, yellow-brown when old, staining pallid brown when injured. Stipes 7-14 cm long, 1-1.6 cm thick at apex, solid, clavate and enlarged downward; surface with vinaceous-brown to purple-brown fibrils, evenly furfuraceous or granulate except the pallid; apex reticulate; base with whitish mycelium; context whitish within, unchanging when cut, but staining ochraceous yellow around larval tunnels. Spore deposit vinaceous-fawn. Spores 9-12 × 4-5 μm, smooth, thin-walled, subfusoid in face view, subequilateral with shallow suprahilar depression in profile, hyaline to pale yellow in KOH, pale yellow in Melzer,s. Basidia 34-40 × 9.5-12 μm, clavate, thin-walled, with two or four spores, hyaline in KOH and Melzer,s. Pleurocystidia 58-94 × 7.5-11.5 μm, scattered, smooth, thin-walled, narrowly fusoid with an elongated neck and tapered to a obtuse apex, hyaline in KOH, hyaline to pale yellow in Melzer,s. Epicutis of pileus a trichodermial palisade; terminal cells cylindrical or cystidioid, versiform, utriform, subampullaceous, or clavate by maturity; apex short and attenuate; content brownish in KOH. Clamp connections absent.
 
 
 
 
 
　Specimens：

Taichung: Da-Shiu-Shan, alt. 2,350 m, 27 Jun 2002, Chen CM. 2856.
 
 
 
　Habitat： Solitary to scatter under Tsuga chinensis Pritz.
 
 
 
　Distribution：

Taiwan, China (Guizhow), Japan.
 
 
 
　References：

Hongo, T. 1967; Chen, CM et al. 2004.
   
   
   
　Provided：

C. M. Chen
 
 
　Note： Tylopilus vinosobrunneus is one of the most unusual species of boletes. It looks like T. neofellus described by Hongo (1967). The most obvious differences between T. vinoso-brunneus and T. neofellus are the shape and size of pleurocystidia. T. vinosobrunneus has narrowly subfusiform pleurocystidia with a neck of 20-26 μm, while T. neofellus is ventricose and its pleurocystidia is much broader than that of the former. In addition, suprapellis of T. vinosobrunneus is a distinctly erect palisade-like trichoderm as viewed in a tangential section, while suprapellis of T. neofellus is parallel to underlying layers.