 Phylum：Basidiomycota >> Class： Basidiomycetes >> Order： Boletales |
||||
 BCRC Number： |
NO BCRC Number! | |||
| Scientific Name： |
Xerocomus nigromaculatus | |||
| Author： |
Xerocomus nigromaculatus Hongo, Journ. Jap. Bot. Vol. 41:170. |
|||
| Description： |
Pileus 2-7 cm broad, convex to plane, margin incurved at first, surface siccous, with tomen-tose-granulose arranged to look alike rimose-areolate, color pallid argillaceous, nigrescent in age. Context soft, whitish to pale yellow, cyanoscent then rufescent immediately when bruised, nigricant eventually. Stipe 2-5 cm long, 4-10 mm broad, subequal to base enlarged with whitish mycelium around base, surface concolorous with pileus, fibrillose-striate to nearly laevigate, context solid and snap easily, rufescent when cut. Tubes 5-12 mm long, adnato-subdecurrent, color flavous, caerulescent when cut. Pores 0.7-2 mm broad, rather large, angular, color flavous and cyanoscent immediately when bruised. Spore print oliva-ceo-brown. Spores 9-15 × 4-5.5 μm, fusiform-ellipsoid, smooth. Basidia 30-35 × 9-11 μm, clavate, sterigmata four, 5-7 μm long. Pleurocystidia versiform, some 63-92 × 16-23 μm, subcylindric to broadly fusifom-ventricose; the others 69-88 × 19-37 μm, ventricose-rostrate, abundant, hyaline in KOH but dingy ochraceous in NH4OH. Clamp connection absent. | |||
| Specimens： |
Taiwan, Miaoli: Jenshan, alt. 2300m, 13 Sept. 1996, Huang HW. 1682. |
|||
| Habitat： |
Scattered under Cryptomeria forest. | |||
| Distribution： |
Taiwan, Japan. |
|||
| References： |
Chen, CM et al. 1997. |
|||
| Provided： |
C. M. Chen |
|||
| Note： |
It can be easily recognized by the black-spotted and argillaceous pileus. Particularly, its flesh being rufescent then nigrescent when bruised, is a unique character in the genus of Xerocomus. | |||