Basionym: Boletus fumosipes Peck, Rept. N. Y. State Mus. 50: 108. 1897.
Tylopilus fumosipes (Peck) Smith & Thiers, The Boletes of Michigan. p. 103.
Description：
Pileus 4-8.5 cm broad, convex to nearly plane, minutely tomentose, rivulose at maturity, color dark olive-brown, context 0.7-1.3 cm thick, whitish, changing slowly and slightly to pale-blue. Tubes 0.5-0.7 mm long, plane in mass, sometimes depressed at maturity, grayish white at first, then lighter grayish yellow to grayish brown, tinged with red when cut. Pores 0.1-0.2 mm broad, whitish when young, becoming yellowish brown in age, changing to vinaceous brown when bruised. Stipes 5-9 cm long, 6-15mm broad, equal or tapering towards base, solid, surface concolorous with pileus or lighter, surface with longitudinal striae and minutely scurfy, sometimes with violet-blue banding at top, always conspicuously white at base. Spore print ochraceous brown to purplish brown. Spores 10-14 × 4-5 μm, smooth, subovate to obtusely fusiform in face view, opaque khaki in KOH and pale dingy tan with a darker border in Melzer,s. Basidia 28-39 × 10-12 μm, clavate, sterigmata four, 3-4 μm long, hyaline in KOH. Pleurocystidia 30-42 × 9-12 μm, clavate to subfusoid. Cheilocystidia 30-55 × 8-18 μm, narrowly to broadly clavate pedicellate to spheropedunculate. Pileus cuticle a trichodermium of elements 8-15 μm in diameter, end-cells subclavate to subfusoid. Clamp connections absent.
Specimens：
Taiwan, Taichung: Takeng, alt. 750 m, 7 June 1995, Huang HW. 1164.
Habitat：
Scattered under Cyclobalanopsis globosa W. F. Lin et T.
Distribution：
Taiwan, Japan, North America.
References：
Smith, AH and Thiers, HD. 1971; Wolfe, JCB and Peterson, RH. 1978; Chen, CM and Peng, JJ. 1998.
Provided：
C. M. Chen
Note：
In the original paper, accompanying the description of Boletus fumosipes, Peck(1897) did not designate a type specimen. Smith and Thiers(1971) accepted the taxon at species rank after thier studying the Peck,s specimen. Wolfe and Peterson (1978) designated a lec-totype for this species. However there are no wide spores such as T. sordidus (Frost) Smith & Thiers (5.5-7 × 10.5-13 μm, according to Coker & Beers, 1943) in our collections. Besides, pileus context of this species change to blue slowly should distingish it from T. um-brosus (Atkinson) Smith & Thiers.
Phylum：Basidiomycota >> Class： Basidiomycetes >> Order： Boletales 
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