Gymnopilus echinulisporus Murrill 1912

Gymnopilus echinulisporus Murrill, Mycologia 4: 255. 1912
Flammula echinulispora Murrill, Mycologia 4: 262. 1912.
Pileus convex to plane, at length depressed, slightly umbonate when young, wood-loving, reaching 7 cm. broad; surface nearly smooth, moist, glabrous, shining, ferruginous at the center, fulvous on the margin, paler in dry weather, when it is usually darker at the center than on the margin, which is folded or fissured, strongly incurved on drying; lamellae sinuateadnate with a tooth, broad, slightly ventricose, ferruginous-isabelline to fulvous; spores broadly ovoid to subglobose, conspicuously and densely echinulate, ferruginous under the microscope, 6-9 X 5-6 /zj stipe equal, or enlarged just at the base, longitudinally striate, whitish to isabelline-ferruginous, about 6 cm. long, 1.3-1.6 cm. thick; veil apparently wanting, even in quite young plants.
Type locality: Mill City, Oregon. Habitat: On dead wood in woods. Distribution: Oregon.

Gymnopilus echinulisporus is a species of agaric fungus in the family Hymenogastraceae. It was first formally described by American mycologist William Alphonso Murrill in 1912.