Pileus (Cap): 2-15 cm broad, convex or obtuse becoming nearly plane sometimes uplifted; surface dry, and first cover with dense, dark red or purple red scales these fade to yellowish red then yellow, scales diminish with age. Surface of cap sometimes staining blue, especially younger mushrooms. Caps of mushrooms growing in clusters often orange from spores. Flesh redish yellow when cut and fadding to to yellow.
Lamellae (Gills): notched to adnate or slightly decurrent, close, 3 or 4 tiers of lamellulae, at first %u2028yellow, pinkish where bruised becoming bright rusty orange as spores mature.
Stipe (stem): 3-10cm long, .4-2.5cm (4cm)thick, fleshy equal or enlarged below, sometimes tapered at base when clustered, center with fibrous pith, sometimes becoming hollow with age. Colored the same as the cap usually darker. Stems sometimes staining blue.superior cortinate sometimes vanishing, colored reddish orange by spore deposit.
Microscopic Features: Bright rusty orange sometimes collecting on cap, veil remnants and wood chips below cap. Spores 6-9 x 4.5-5.5 um; warty; elliptical; dextrinoid. Pleurocystidia infrequent and inconspicuous. Cheilocystidia usually abundant; fusoid-ventricose, rostrate, capitate, or lecythiform. Caulocystidia absent.
Season: Much like other Gymnopilus species it is found Late july through november, but really depends on the conditions.
Habitat and Distribution: Growing in the east and west of North America, widely distributed. Much like G. junonius these are found on decaying wood, both hardwoods and conifers, I have found them mostly on conifers, but I live in a heavy conifer zone. They can grow on newly fallen trees sometimes as old as a year, but prefer older logs, fallen trees, and wood chips.