Clitocybe celata H. E. Bigelow 1981

Melanoleuca robinsoniae Murrill, sp. nov
Pileus fleshy, convex to subexpanded, somewhat irregular, cespitose, 4-7 cm. broad; surface smooth, glabrous, dry, white or yellowish, slightly darker at the center, isabelline to fulvous on drying, margin thin, concolorous, inflexed when young ; context firm, white, rather thick at the center; lamellae sinuate with decurrent lines, of medium breadth and distance, firm, white; spores ellipsoid, smooth, hyaline, about 7X5 m; stipe short, rather tough, much enlarged at the base, smooth, white, glabrous, 3-7 cm. long, 1-2.5 cm. thick.
Type collected on the ground among herbaceous plants at Yellowstone kake, Wyoming, 2300 m. elevation, August 9, 1912, Winifred J. Robinson 12. Distribution: Known only from the type locality.