Phylum：Basidiomycota　>>　Class： Basidiomycetes　>>　 Order： Polyporales 
   
 
　BCRC Number： NO BCRC Number!  
   
　Scientific Name： Ganoderma rotundatum
 
   
   
　Author：

Ganoderma rotundatum J.D. Zhao, L.W. Hsu & X.Q. Zhang, Acta Microbiol. Sinica 19: 267. 1979..
   
 
 
 
 
　Description： Basidiocarp pileate, sessile, woody. Pileus slightly convex, semicircular, 25 cm wide, growth length 14 cm, up to 6 cm thick at the base. Upper surface glabrous, brown, occasionally purplish- or reddish-tinted, slightly laccate, concentrically sulcate and zonate; margin thinning out, obtuse, entire or slightly undulate, yellow. Context up to 5 cm thick, indistinctly duplex, with a dominant wood-colored zone overlying a brown zone near the tube layer. Tube layer up to 1.2 cm thick, with color somewhat intermediate between two zones of the context. Pileus crust brown, ca. 0.5 mm thick, composed of golden brown skeletal hyphae and swollen hyphal ends. Pore surface cream; pores suborbicular, ca. 5 per mm. Context hyphal system trimitic; generative hyphae rare, colorless, thin-walled, nodose-septate, 2-3.5 μm diam.; skeletal hyphae yellow to brown, thick-walled to subsolid, with a few distal branches, skeletal stalks 4.5-7 μm diam., branches 2.5-4.5 μm diam.; binding hyphae colorless, thick-walled to solid, branched, 1-2 μm diam. Basidia not seen. Basidiospores ellipsoid or broadly ellipsoid, truncate at apex, bearing one big oily drop, 9.5-12.5 × 6.5-8 μm; exospore colorless, thin; endospore thick, brown, separated from exospore by interwall pillars.
 
 
 
 
 
　Specimens：

Taiwan. Pingtung: Wutai, on butt of Acacia confusa, 15 Oct 1998, Wu 9808-1 (TNM, HMAS).
 
 
 
　Habitat： null
 
 
 
　Distribution：

China (Hainan, type locality), tropical Taiwan.
 
 
 
　References：

Wu, SH. & Zang, X.Q. 2002.
   
   
   
　Provided：

S. H. Wu
 
 
　Note： This species is characterized by having the large basidiocarps broadly and loosely attached to the tree trunk. This species was previously known only by the holotype. Unfortunately the type specimen was accidently burnt and only part of the basidiocarps remained (Zhao and Zhang, 2000).