Gymnopilus flavidellus Murrill 1917

Gymnopilus flavidellus Murrill, sp. nov
Pileus convex to plane or slightly depressed, gregarious or subcespitose, 3-5 cm. broad; surface dry or moist, smooth, glabrous, not striate, melleous to ochraceous or luteous at the center, margin entire, cream-colored; context yellowish, with mawkish, slightly bitter taste; lamellae adnate or sinuate with a decurrent tooth, rather crowded and narrow, pale-yellow to ferruginous; spores ovoid, minutely echinulate, ferruginous, 8-9 X 5-6 /x; stipe subequal, solid to hollow, pale-yellow to yellowish-brown, pruinose at the apex, whitish-mycelioid at the base, 3-5 cm. long, 3-5 mm. thick; veil arachnoid, fugacious.
Type collected on a chestnut stump in woods at the New York Botanical Garden, September 9,
1911, W. A. Murrill (herb. N. Y. Bot. Gard.).
Habitat: On dead wood of various deciduous and coniferous trees. Distribution: Throughout most of temperate North America; also in Bermuda.

Gymnopilus flavidellus is a species of mushroom in the family Hymenogastraceae.