Heterobasidion insulare (Murrill) Ryv., Norw. J. Bot. 19: 237. 1972.
Description：
Basidiocarp annual, pileate to effused-reflexed with a broad resupinate base, solitary to imbricate, up to 10 cm wide and 1 cm thick; pilear surface glabrous, with an orange to reddish cuticle which is darker towards the base, cream to light brown towards the margin, broadly concentrically zonate, slightly radially striate; pore surface cream to light orange when fresh, darkening to yellowish orange, pores 2-3 per mm, irregular to lacerate. Hyphal system di-trimitic; generative hyphae simple-septate, hyaline, up to 5 μm wide; skeletal hyphae dextrinoid, thick-walled, hyaline, unbranched, sinuous, up to 6 μm; pilear surface composed of light brown, straight skeletal hyphae forming a cutis. Basidiospores ovoid, with a fine ornamentation which is inconspicuous in KOH, hyaline, 5-6 × 4-4.5 μm, uniguttulate, dextrinoid.
Specimens：
Taiwan, Taichung : Anmashan, alt. 2100 m, on rotten wood of Pinus sp., TFRI 1069. Hsinchu, Kuanwu, alt. 1800 m, on rotten wood of conifer, TFRI 974. Taipei : Sautsu, alt. 300 m, on basal stem of Pinus sp., TFRI 915.
Habitat：
Lignicolous causing white rot of wood.
Distribution：
Australasian species.
References：
Yen, PC et al. 2002, Nunez, M and Ryvarden, L. 2001.
Provided：
T. T. Chang
Note：
The species differs from H. annosum by its tendency to develop distinctly pileate basidiocarps, its larger basidiospores.
Phylum：Basidiomycota >> Class： Basidiomycetes >> Order： Poriales 
BCRC Number：