Gymnopilus junonius 

Gymnopilus luteus 00336

Gymnopilus luteus (Fr.) P.D. Orton 1960

is growing in this case from dead wood of a oak in tight clusters. It has a medium to large yellow-orange cap with pale brownish fibrils from the disc outwards, remnants of the partial veil on the margin, yellow gills that become somewhat rusty as the spores are released, and a fibrous yellowish stem with a ring that turns rust-brown. This species is often confused with Gymnopilus junonius. Like it, Gymnopilus luteus is also extremely bitter to taste and is hallucinagenic. It is in the Hymenogastraceae family of the Agaricales order.

Gymnopilus luteus

Gymnopilus luteus