Phylum：Basidiomycota　>>　Class： Basidiomycetes　>>　 Order： Boletales 
   
 
　BCRC Number： NO BCRC Number!  
   
　Scientific Name： Heimiella nigricans
 
   
   
　Author：

Heimiella nigricans Zang, Acta Botanica Yunnanica 7: 395. 1985.
   
 
 
 
 
　Description： Pileus 4-6 cm broad, convex, expanding to plano-convex and margin up-lifted with age, surface siccous, subtomentose; color nigro-brunneous. Context 5-7 mm thick, palid brunneous, unchanging when injuried. Tube 4-6 mm long, depressed around the stipe, ventricose in profile, color brown or black. Pores 0.3-0.5 mm wide, circular. Stipes 4-5 cm long, 0.9-1.2 cm thick at apex, clavate and up to 1.8 cm thick at base, surface with longitudinal reticulum, color black, flesh spongiose and mycelium brunneous. Spore print olive-brown. Spores 11-14 × 6-7.5 μm, subglobose or broadly elliptic, exosporium with warts and covered by an incomplete network of irregular ridges to form an reticulum which dropping easily (Fig.16), olivaceous-hyaline or brunneous-hyaline in KOH. Basidia 28-39 × 10.5-14 μm, clavate, hyaline in KOH, pale yellow in Melzer's, sterigmata four, 6-7 μm long. Pleurocystidia 45-65 × 15-20 μm, subobclavate or ventricose. Hymenophoral trama boletoid type. Clamp connection absent.
 
 
 
 
 
　Specimens：

Taiwan, Taichung: Lilenglintao, alt. 2050 m, 22 June 1995, Huang HW 1212.
 
 
 
　Habitat： Solitary in the mixed forest.
 
 
 
　Distribution：

Taiwan, China (Yunnan).
 
 
 
　References：

Chen, CM et al. 1998.
   
   
   
　Provided：

C. M. Chen
 
 
　Note： This species is distinguishable from other species in family Strobilomycetaceae by having the subcircular spores with irregular netted exosporium and the tubes conspicuously ventricose at maturity with their mouths dark pink-brown when bruised. The pileus colors are much darker and a lack of vinaceous or orange tint. The spores are smaller than in H. japonica Hongo.