218 
Mycologia 
Type collected in rich soil at Berkeley, California, January 31, 
1911, R. A. Harper 12. Also collected by Harper in the same 
locality on February 6, 1911, and February 14, 1911. The species 
was found on one occasion growing in a fairy ring. 
Melanoleuca nuciolens sp. nov. 
Pileus convex to nearly plane, often becoming depressed and 
irregular with age, gregarious, subcespitose, reaching 6 cm. 
broad ; surface glabrous, rather uneven, hygrophanous, pale-rosy- 
isabelline, margin concolorous, undulate to conspicuously lobed 
and upturned with age; context white, thin, having the odor of 
walnuts in dried specimens ; lamellae sinuate varying to adnate, 
narrow, arcuate, rather distant, pale-rosy-isabelline, becoming 
slightly purplish-spotted when bruised or on drying; spores ellip- 
soid, smooth, hyaline, 6 X 3-5 m ; stipe equal or slightly tapering 
upward, sometimes distorted in old specimens, smooth, glabrous, 
pallid, hollow, almost cartilaginous, about 5-6 cm. long, 1-1.5 cm. 
thick. 
Type collected in sandy soil in woods near Seattle, Washing- 
ton, October 20-November i, 1911, W . A. Murrill 658. 
Melanoleuca Olesonii sp. nov. 
Pileus convex to plane, large, rather thick at the center, fleshy, 
gregarious, reaching about 14 cm. broad; surface pure-white, 
smooth, glabrous, moist, margin thin, entire or slightly lobed, con- 
colorous, not indexed on drying; lamellae broad, ventricose, 
crowded, sinuate, white becoming discolored on drying; spores 
ellipsoid, smooth, hyaline, 7-9 X 4-5 .w ; stipe short, thick, equal or 
slightly bulbous, smooth, glabrous, white, solid, about 4-5 cm. 
long and 2-3 cm. thick. 
Type collected on the ground under an oak at IMission Canon 
near Santa Barbara, California, spring of 1913, O. M. Oleson 
100. Also collected February 17, 1894, M. T. Cook 8. The 
above description is drawn from dried specimens. 
Melanoleuca oreades sp. nov. 
Pileus becoming broadly convex or plane to somewhat de- 
pressed, large, fleshy, growing in circles, subcespitose at times, 
reaching 15 cm. broad; surface dry, smooth, slightly silky-striate, 
pale-avellaneous ; context with an agreeable, nutty flavor and an 
