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

Hyphoderma rimulosum Sheng H. Wu, Bot. Bull. Acad. Sin. 38: 66. 1997..
   
 
 
 
 
　Description： Basidiocarp resupinate, effuse, adnate, 70-130 μm thick in section, membranaceous. Hymenial surface white to ivory yellow in color, smooth, minutely cracked throughout; margin rather determinate, concolorous, slightly pruinose-filamentose. Hyphal system monomitic; hyphae nodose-septate. Subiculum composed of medullary layer. with loose to dense texture; hyphae variously oriented, colorless, 2-4 μm diam., thin-walled. Basal hyphae sometimes present. Hymenial layer with dense texture; hyphae mainly vertical, colorless, 2-3 μm diam., thin-walled. Cystidia usually immersed, cylindrical, colorless, usually encrusted throughout, 30-55 μm long, 4-6 μm diam. (without encrustation), slightly thick-walled. Basidia utriform, 22-32 × 4.5-6 μm, 4-sterigmate. Basidiospores ellipsoid, adaxially slightly concave, smooth, thin-walled, 6-7 × 3.9-4.1 μm ((holotype spore-print: X = 6.47 ± 0.38 × 4.03 ± 0.06 μm, n = 30), IKI－, CB－.
 
 
 
 
 
　Specimens：

Taiwan. Nantou: Entrance of Shalihsienhsi Forest Road near Tungpu, alt. 1,350 m, on culm of Miscanthus floridulus, 24 Nov 1993, Wu 9311-62 (holotype, TNM).
 
 
 
　Habitat： null
 
 
 
　Distribution：

Taiwan.
 
 
 
　References：

Wu, SH. 1997.
   
   
   
　Provided：

S. H. Wu
 
 
　Note： This species is closely related to Hyphoderma fouquieriae Nakasone & Gilb. by having similar characters of encrusted cystidia, and similar-sized basidiospores. Basidiospores of H. fouquieriae were measured in this study as 5.5-6.7 x 3.5-4.2 μm from the holotype (K.K. Nakasone 207, deposited in BPI). The main feature can be used to separate them is the difference of subicular hyphae. Hyphoderma rimulosum has subicular hyphae with 2-4 μm diam. and thin walls, while those in H. fouquieriae are 3-7 μm diam., with 0.7-1.7 μm thick walls (measured from the holotype). Incompatibility between the two species was obtained in this study. Two monosporous mycelia sourced from holotype of H. rimulosum were respectively paired with polysporous mycelium of a H. fouquieriae specimen (K.K. Nakasone 121). Incompatibility between them was indicated by the failure of dikaryotization of the monosporous mycelia after contact of four weeks.