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

Tylopilus ferrugineus (Frost) Sing, Am. Midl. Nat. 37: 106. 1947.

Basionym: Boletus ferrugineus Frost, Bull. Buff. Soc. Nat. Sc. 2:104. 1874.

   
 
 
 
 
 Description: Pileus 6-14 cm broad, pulvinate to convex and often somewhat irregular, color dark brown, then reddish brown to neutral brown, with yellowish tint towards the margin, not viscid, surface entirely minutely tomentose in young, often glabrescent or sometimes rimulose in age. Context white, becoming pinkish- avellaneous to brown when cut. Tubes 0.6-1.3 cm long, adnate to depressed around stipe, whitish, becoming brown when bruised. Pores angular, 0.5-1 mm wide, color concolorous with the tubes , but sometimes brownish to brown dotted, becoming brownish ochraceous to brown when bruised. Stipes 6-9 cm long, 1-1.7 cm broad, solid, subcylindric and tapering upwards, concolorous with the pileus or lighter colored from the lower part upwards, with a reticulation which descends from the apex to two thirds of the length of the stipe, this reticulation white to avellaneous, the meshes longitudinally elongate. Spore print cinnamon brown. Spores 9-13 × 4.5-5.5 μm, ellipsoid-subfusoid. Basidia 34-42 × 11-13 μm, clavate, sterigmata two or four, 5-6 μm long. Pleurocystidia 47-58 × 10-15 μm, ventricose, hyaline or yellowish in KOH. Clamp connec-tion is absent. Tube trama of bilateral type. Epicutis of pileus is formed with trichodermium of interworen hyphae, not forming a palisade, terminal cells and the lower cells are cylindric, 4.5-9 μm broad.
 
 
 
 
 
 Specimens:

Taiwan, Nantou: Shanlinhsi, alt. 1750 m, 3 June 1994, Huang HW. 297.

 
 
 
 Habitat: Scattered under Castanopsis.
 
 
 
 Distribution:

Taiwan, China, Japan, North America, Mexico.

 
 
 
 References:

Wolfe, JCB. 1981; Chen, CM and Peng, JJ. 1998.

   
   
   
 Provided:

C. M. Chen

 
 
 Note: This species is similar to Tylopilus indecisus (Peck) Murrill. But the latter differs from T. ferrugineus in narrower epicutis-hyphae (2.5-5 μm according to Wolfe, 1981), larger spores and having vinaceous spores in a deposit, not cinnamon brown.