Hymenochaetales » Hymenochaetaceae » Fuscoporia

Fuscoporia ferruginosa

Fuscoporia ferruginosa (Schrad.) Murrill 1907, in Dai, Y.C., Fungal diversity, 45, 131-343 (2010)

Diagnosis: Fruitbody Basidiocarps perennial, resupinate, inseparable, without odour or taste and corky when fresh, lightweight and hard corky when dry, up to 21 cm long, 7 cm wide and 3 mm thick. Pore surface yellowishbrown to dark reddish brown; margin narrow to wide, pale brown to dull brown, matted with abundantmycelial setae, 12 mm wide; pores more or less circular, 78 per mm; dissepiments thick, matted, entire to slightly lacerate. Subiculum umber-brown, corky, up to 0.3 mm thick. Tubes isabelline in the new layer, and clay-buff in old layers, hard corky, up to 2.7 mm long, tube layers mostly distinct, separated by a thin layer of context-resembling mycelium Hyphal structure Hyphal system dimitic; generative hyphae simple septate; tissue darkening but otherwise unchanged in KOH. Subiculum Generative hyphae infrequent, hyaline, thinwalled, occasionally branched, frequently simple septate, 1.83 μm in diam; skeletal hyphae dominant, rust-brown, thick-walled with a narrow to wide lumen, unbranched, rarely septate, flexuous to fairly straight, usually interwoven close to the tubes, but regularly arranged close to the substrate, 2.63.7 μm in diam. Mycelial setae frequent dark reddish brown, thick-walled, tapering to apex, up to 240 μm long and 711 μm in the widest part. Tubes Generative hyphae infrequent, mostly present at dissepiment edges and subhymenium, hyaline, thinwalled, occasionally branched, frequently septate, 23 μm in diam, some of them at dissepiment edges and hymenium encrusted; skeletal hyphae dominant, yellowish brown to rust-brown, thick-walled with a narrow to medium wide lumen, unbranched, rarely septate, flexuous or more or less straight, interwoven close to the tube bottoms, subparallel in lower parts close to the dissepiment edge, 2.23.2 μm in diam. Setae frequent, mostly originating from tramal hyphae, subulate, dark brown, thick-walled, some of them embedded in trama, 3590×79 μm; fusoid cystidioles infrequent, hyaline, thin-walled, usually covered by crystals; basidia clavate, with four sterigmata and a simple septum at the base, 1418×4.85.5 μm; basidioles dominating in hymenium, in shape similar to basidia, but slightly smaller; secondary hyphae usually present in old tubes, hyaline to pale yellowish, thin- to fairly thick-walled, occasionally branched and septate, 1.82.6 μm in diam. Spores Basidiospores ellipsoid, hyaline, thin-walled, smooth, bearing a medium size guttule, usually glued in tetrads, IKI, CB, (4–)4.25.2(–5.5)×(2.7–)2.83.5(–4) μm, L=4.79 μm, W=3.17 μm, Q=1.461.57 (n=70/3).

Index Fungorum Number: IF122487

Notes: Fuscoporia ferruginosa is usually sterile after collecting, and such specimens are very similar to F. ferrea, but the mycelial setae are the diagnostic of the species.


Figure 1. A basidiocarp of Fuscoporia ferruginosa

Figure 2Microscopic structures of Fuscoporia ferruginosa. a basidiospores; b setae; c mycelial setae from subiculum; d skeletal hyphae from subiculum; e skeletal hyphae from trama; f hyphae at dissepiment edge


Dai, Y.C. (2010). Hymenochaetaceae (Basidiomycota) in China. Fungal diversity, 45, 131-343.


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The webpage Basidiomycota provides an up-to-date classification and account of all genera of the phylum Basidiomycota.


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Thailand Science Research and Innovation (TSRI)

project entitled:

"Macrofungi diversity research from the Lancang-Mekong Watershed and surrounding areas"

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