 Phylum：Basidiomycota >> Class： Basidiomycetes >> Order： Boletales |
||||
 BCRC Number： |
NO BCRC Number! | |||
| Scientific Name： |
Boletus nigricans | |||
| Author： |
Basionym: Boletus nigricans Zang, Yuan et Gong, Act. Myc. Sin. 12:278. 1993. |
|||
| Description： |
Pileus 4-9 cm broad, surface siccous, smooth to mound-shaped bump, tomentose and finely areolate, nigricant. Context 0.5-2 cm thick, hysginous brown. quickly nigrescent when bruised. Tubes 0.6-0.9 cm thick, badious, becoming nigricant in age, adnate to adnexed. Pores angular or irregular, 1-1.1 mm broad. Stipe 5.5-7.5 cm long, 0.5-2 cm thick, clavate to subequal, with blackish mycelium around base, surface reticulate very clearly, especially in upper part. Spore print olivaceous brown. Spores 12-13 × 5-5.6 μm, ellipsoid, smooth, pallid yellow, luteo-brunneous in Melzer's. Basidia 42-47 × 12-14.5 μm, clavate, sterigmata two or four, 5.5-7 μm long. Pleurocystidia 65-72 × 15-19 μm, clavate to ventricose-rostrate. Clamp connections absent. | |||
| Specimens： |
Taiwan, Nantou: Shanlinhsi, alt. 1750 m, 4 Jul 1993. Chen CM. 916. |
|||
| Habitat： |
Scattered under Rhododendron formosanum Hemsal. forest. | |||
| Distribution： |
Taiwan, China(Sichuan). |
|||
| References： |
Chen, CM et al. 1997. |
|||
| Provided： |
C. M. Chen |
|||
| Note： |
This species is similar to B. nigerrimus Heim. Besides ellipsoidal spores and reticulate stipes, it is distinguished by the carpophore, context and hymenium are all blackish, not with purple tint like the latter. | |||