Phylum：Basidiomycota　>>　Class： Basidiomycetes　>>　 Order： Polyporales 
   
 
　BCRC Number： NO BCRC Number!  
   
　Scientific Name： Hyphoderma microcystidium
 
   
   
　Author：

Hyphoderma microcystidium Sheng H. Wu, Acta Bot. Fennica 142: 77. 1990.
   
 
 
 
 
　Description： Basidiocarp effuse, adnate, farinaceous, 30-50 μm thick in section. Hymenial surface whit-ish, smooth, not cracked; margin concolorous, thinning, pruinose. Hyphal system monomitic; hyphae nodose-septate. Subiculum uniform, composed of basal layer, with compact texture, 5-12 µm thick; hyphae horizontal, colorless, agglutinated, 2.5-4 µm diam., slightly thick-walled. Hymenial layer with compact texture; hyphae ± vertical, colorless, indistinct, 1.7-3.5 µm diam., thin-walled. Crystal masses scattered in section. Cystidia of two kinds: (1) Lamprocystidia numerous, projecting or immersed, colorless, heavily encrusted for approximately apical halves, 17-32 × 7-10.5 µm (encrustation included), slightly thick-walled. (2) Leptocystidia variably abundant, projecting or immersed, apically covered with excreted material which dissolves in KOH, cylindrical, 20-65 × 8-13 µm, very thin-walled. Basidia subutriform, 18-25 × 6.5-7.5 µm, 4-sterigmate. Basidiospores narrowly ellipsoid, adaxially slightly concave, smooth, thin-walled, usually with oil-drops, 10-12.5 × 4-4.8 µm, IKI-, CB-.
 
 
 
 
 
　Specimens：

Taiwan. Nantou: Sun-Moon Lake, alt. 800 m, on culm of Poaceae, 26 Oct 1988, Wu 881026-31 (holotype: H; isotype: TNM).
 
 
 
　Habitat： null
 
 
 
　Distribution：

Taiwan.
 
 
 
　References：

Wu, SH. 1990.
   
   
   
　Provided：

S. H. Wu
 
 
　Note： Hyphoderma microcystidium is characterized by the presence of small lamprocystidia and very thin-walled leptocystidia, which are covered with excreted material at their apices.