Polypore oak (Buglossoporus oak)
- Division: Basidiomycota (Basidiomycetes)
- Subdivision: Agaricomycotina (Agaricomycetes)
- Class: Agaricomycetes (Agaricomycetes)
- Subclass: Incertae sedis (of uncertain position)
- Order: Polyporales (Polypore)
- Family: Fomitopsidaceae (Fomitopsis)
- Genus: Buglossoporus (Buglossoporus)
- Type: Buglossoporus quercinus (Piptoporus oak (Oak polypore))
The oak tinder fungus is a very rare mushroom for Our Country. It grows on living oak trunks, but specimens have also been recorded on dead wood and deadwood.
Fruit bodies are annual, fleshy-fibrous-cork, sessile.
There may be an elongated rudimentary leg. Hats are rounded or fan-shaped, rather large, can reach 10-15 centimeters in diameter. The surface of the caps is velvety at first, in mature mushrooms it is almost naked in the form of a thin cracking crust.
Color – whitish, brown, with a yellowish tinge. The flesh is white, up to 4 cm thick, soft and juicy in young specimens, later corky.
The hymenophore is thin, whitish, turning brown when damaged; the pores are rounded or angular.
The oak tinder fungus is an inedible mushroom.