Phylum:Basidiomycota >> Class: Basidiomycetes >>  Order: Boletales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Strobilomyces seminudus

Strobilomyces seminudus Hongo, Trans. mycol. Soc. Japan 23: 197. 1982.

 Description: Pileus 3-7.5 cm broad, convex, becoming broadly convex to nearly plane; surface tomentose to tomentose-squamulose, dry, hair brown to drab, often cracked into adnate scaly patches, showing whitish to grayish flesh in the cracks; margin widely appendiculate with a floc-cose-membranous concolorous veil. Context firm, whitish, rubescent then nigrescent on bruising; taste mild, odor none. Tubes adnate, sometimes becoming somewhat depressed around the stipe with age, 3-9 mm long, whitish gray then fuliginous. Pores angular, 0.5-1 mm wide, whitish to grayish, rubescent-nigrescent on bruising. Stipe 5-9.5 cm long, 5-9 mm thick at apex, equal or enlarged downward to 8-11 mm at base with white mycelium over base, solid; surface pale drab to fuscous, reticulate with elongate meshes above and floc-cose-squamulose below, with gray, thick, woolly annular zone near the apex. Spores 10-11 × 8-10 μm, subglobose, dark brown in KOH, with fragments of network and spines. Basidia 32-41 × 15-17 μm, sterigmata two or four, 7-8 μm long. Pleurocystidia 32-54 × 9-17 μm, fusoid to ventricose, often with an elongate neck, with melleous to umbrinous contents. Cheilocystidia 35-61 × 16-21 μm, numerous, clavate to subfusoid-clavate or fusoid-ventricose, hyaline or with brownish to pale fuscous contents, thin-walled. Hymenophoral trama boletoid type. Clamp connections absent. Pileal cuticle a trichoder-mium of brown septate hyphae, 5-18 μm thick, the end cells often slightly attenuated toward the apex.

Taiwan, Nantou: Tiehpiluchi, alt. 1550 m, 24 Jun 1994, Huang HW 515.

 Habitat: Solitary to scattered in the mixed leaved forest.

Taiwan, China (Zhejiang, Fujian), Japan.


Chen, CM et al. 1998.


C. M. Chen

 Note: The tomentose to tomentose-squamulose, rimose-areolate surface of pileus, and more rounded and more spiny spores (Fig.20) are the characteristics, making this species easily and accurately recognizable. Reticulation of the stipe is much coarser, and its cap without rigid, acute and erect scales is more smooth than that of S. confusus Sing.