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

Tylopilus castaneiceps Hongo Journ, Jap. Bot. Vol. 60:375. 1985.
   
 
 
 
 
　Description： Pileus 4-8 cm broad, convex to applanate, viscid when wet, color chestnut brown to casta-neous , margin slightly projected, context color white to paler brown, aureous maculose at stipe apex, no odor, taste bitter. Tubes depressed around stipe apex, 4-6 mm long, whitish to pallid argillaceous-vinaceous. Pores concolorous with tubes, no changing when bruised, minutely, 0.3-0.8 mm broad, round to angular. Stipes 4.5-8.5 cm long, 7-12 mm broad, subequal or tapered to apex, surface whitish yellow, freqnently aureous maculose, with con-spicuously reticulate, solid. Spore print brown. Spores 13-17 × 4.5-5 μm, inequilateral, smooth, with a conspicuous suprahilar depression, stramineous under microscope. Basidia 25-33 × 10-12 μm, sterigmata four, 4-6 μm long, crystal content in Melzer,s. Pleurocystidia 30-42 × 12-15μm, sparse, fusiformic-ventricose, apex rostrate, sometimes conspicuously angustate, hyaline, thin-walled. Cheilocystidia abundant, dimorphous, one 35-68 × 6-8 μm, elongate-cylindrate, 1-2 septates, apex obtuse to round, hyaline; the other 40-48 × 10-13 μm, fusiformic-ventricose, obtuse to subacute, hyaline, thin-walled. Tube trama of bilateral, epithelium of pileus ixotrichoderm, gelatinosis 3-5.5 μm broad. Clamp connection is absent.
 
 
 
 
 
　Specimens：

Taiwan, Nantou: Oomandai, alt. 1200 m, 22 Jun 1994, Huang HW. 468.
 
 
 
　Habitat： Scattered under mixed forest.
 
 
 
　Distribution：

Taiwan, Japan.
 
 
 
　References：

Wolfe, JCB. 1971; Chen, CM and Peng, JJ. 1998.
   
   
   
　Provided：

C. M. Chen
 
 
　Note： The combination of the ixotrichodermium of pileus cuticle and brown spore print recall the genus Mucilopilus proposed by Wolfe (1971). The spore Em value (length/width ratio) of Mucilopilus is consistently greater than 3.0. Moreover pleurocystidia are void of microchemically reactive contents and are hyaline. But the spore Em value of this species is about 2.7-3.4 and pleurocystidia turn both yellowish brown and crystal content in Melzer,s. In the field, it can be recognized by the viscid, castaneous cap and yellowish-reticulate stipe.