Phylum:Basidiomycota >> Class: Basidiomycetes >>  Order: Boletales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Boletus tubulus

Boletus tubulus Zang & C. M. Chen, Fung. Sci. 13: 23. 1998.

 Description: Pileus 8-12 cm broad, obtusely convex when young, becoming plano-convex to plane when mature. Surface dry, pale brownish, sombre brown, finally at times dull olivaceous, glabrescent, often rimose or lacunose. Flesh bright yellow to yellowish, unchanging. Hymenophore adnate-depressed, deep yellow. Hymenium whitish when young becoming whitish yellow. Stipe often tough and hard, striate to glabrous, with a very fine reticulum that is light brown to yellowish brown. Basidiospores 13-15.6 × 5.5-6.5 μm, ovoid, subellipsoid. Basidia 30-40 × 10-13 μm, clavate. Pleurocystidia 35-60 × 8-15 μm, fusiform or clavate. Cheilocystidia 39-55 × 6.5-9.5 μm, clavate. Mycelium yellowish. Tube-trama parallel with axis and interwoven.

Taiwan, Nantou: Shanlinhsi, alt. 1800m, 3 Jun 1994, Huang HW. 830518.

 Habitat: In sylvis Rhododendron formosanum Hemsl..



Zang, M. 1991; Zang, M and Chen, CM. 1998.


C. M. Chen

 Note: This new taxon was described to be placed in Sect. Boletus, Subsection Brevitubi (Zang, 1991). This fungus is distinguished by the short tubes, which suggest a close relationship with Boletus brevistubus Zang but the pale brown and olivaceous pileus, the spores 13-15.6 × 5.5-6.5 μm larger than Boletus brevistubus (6.5-10.4 × 5.2-6 μm ) make it distinct.