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

Boletus violaceofuscus Chiu, Mycologia 40: 210-211. 1948.

 Description: Pileus 4-9 cm broad, convex to applanate, blue violet to dark purple, surface smooth, minutely velvety, viscid when wet. Context whitish, color unchanging when bruised. Tubes sinuate or free, depressed around stipe, at first white, becoming yellowish. Pores minute circle, 0.5-1 mm broad, white becoming yellowish with age or bruised. Stipe 6-8 cm long, 1-1.5 cm broad, cylindric, tapered toward apex, concolorous with pileus or paler, surface disinctly reticulate with white veins. Spore print olivaceous brown. Spores 19-21 × 6.5-9 μm, subfusiform. Basidia 31-37 × 14-17 μm, clavate, sterigmata four, 3-4 μm long. Pleurocystidia 35-40 × 10-13 μm, clavate. Chilocystidia 38-61 × 9-12 μm, ventricose-rostrate.

Taiwan, Nantou: Shanlinhsi, alt. 1750m, 1 Jul 1994, Huang HW. 187.

 Habitat: Scattered under Gordonia, Quercus etc.

Taiwan, China (Kwangtung, Kwangsi, Guizhou), Japan.


Chiu, WF. 1948; Ying, JZ and Zang, M. 1994; Chen, CM et al. 1997.


C. M. Chen

 Note: This species collected from Kunming market in 1948 was first studied and described by Chiu (1948). It is quite distinct in appearance, i.e. dark violet color and conspicuously white reticulation on the stipe, at once distinguish it from the white-tubed boletes, whatever may be thought of its validity as a species. But there was not any description about basidia, pleurocystidia and cheilocystidia in Chiu's original paper. However this species ordinarily happened in China. The microscopic features of this specimen were met with those collected from Yunnan, Sichuan Province of China (Ying and Zang, 1994).