Parr 6, 1916] AGARICACEAE 415 
79. Clitocybe atrialba Murrill, Mycologia 5: 207. 1913. 
Pileus convex to slightly depressed and at length infundibuliform, regular in outline, soli- 
tary or gregarious, reaching 6 cm. broad; surface at first smooth, glabrous, dry, fuliginous-ater, 
becoming finely imbricate from the breaking up of the cuticle; margin entire, concolorous, 
strongly inflexed on drying: context thin, white, tough, with mild flavor; lamellae decurrent, 
not crowded, white, becoming grayish-discolored: spores globose to subglobose, smooth, hyaline, 
granular, 8.5-10 X 7-8 uw: stipe equal or slightly tapering upward, flattened or twisted at times, 
dry, furfuraceous or finely scabrous, avellaneous, hollow, with rather tough rind, 5-10 cm. long, 
6-10 mm. thick. 
TYPE LOCALITY: Seattle, Washington. 
Hasirrat: On decayed buried wood in woods. 
DISTRIBUTION: Washington and California. 
80. Clitocybe brunnescens Murrill, Mycologia 5: 208. 1913. 
Pileus rather thin, slightly depressed, rarely infundibuliform, reaching 4 em. broad; 
surface slightly viscid when moist, smooth, glabrous, dull-avellaneous, margin entire, concolor- 
ous: context thin, whitish, with strongly farinaceous odor: lamellae decurrent, subcrowded, 
natrow, dull-avellaneous, becoming dark-fuliginous, especially on the edges: spores globose, 
smooth, hyaline, 3-3.5 4: stipe subequal, smooth, glabrous, concolorous above, whitish-to- 
mentose below, stuffed or hollow, 3-4 cm. long, 4-7 mm. thick. 
TYPE LOCALITY: Seattle, Washington. 
HasitaT: Among sticks in woods. 
DisTRIBUTION: Known only from the type locality. 
81. Clitocybe griseifolia Murrill, Mycologia 5: 208. 1913. 
Pileus large, fleshy, convex to expanded or slightly depressed, usually solitary, reaching 
9em. broad; surface slightly viscid when moist, smooth, glabrous, grayish-white or avellaneous, 
tinged with brownish-avellaneous at the center, margin thin, somewhat lobed, slightly paler, 
strongly incurved on drying: context white, fragrant; lamellae rather broad and crowded, short- 
decurrent or rarely adnate, grayish to dirty-white: spores ellipsoid, smooth, hyaline, 5-6 X 3- 
3.5 uw: stipe bulbous, tapering upward, smooth, glabrous, stuffed, white, 6-9 cm. long, about 1 
em, thick, 2 cm. or more thick at the base. 
TYPE LOCALITY: Seattle, Washington. 
Hasitat: In humus in woods. . 
DIstTRIBUTION: Washington, Oregon, and California. 
82. Clitocybe Harperi Murrill, Mycologia 5: 209. 1913. 
Pileus convex to plane, subcespitose, reaching 8-10 cm. broad; surface dry, smooth, gla- 
brous, cinereous to pale-murinous, margin entire, concolorous, inrolled: context white, the 
taste mild; lamellae short-decurrent, of medium distance, narrow, slightly arcuate or plane, 
several times inserted, cinereous, sometimes with a greenish tint: spores ellipsoid, smooth, 
hyaline, 4-6 X 2-3 yu: stipe bulbous, whitish-mycelioid at the base, concolorous, pruinose, 
hollow, 3-7 cm. long, 1-3 cm. thick. 
Typr Locality: Golden Gate Park, San Francisco, California. 
HasirtaT: On the ground in woods or groves. 
DisTRIBUTION: California. 
83. Clitocybe niveicolor Murrill, Mycologia 3:190. 1911. 
Entire hymenophore snow-white, gregarious: pileus compressed-convex, reaching 7 mm. 
in diameter; surface smooth, glabrous, appearing subtomentose when dry because of the loosely 
woven context, margin slightly irregular, decurved: lamellae decurrent, distant, slightly arcuate: 
spores ovoid, smooth, hyaline, 12 X 7 uw: stipe cylindric, slightly tapering upward, glabrous, 
fleshy, fistulose, 1—1.5 cm. long, 1 mm. thick above, 1.5 mm. below. 
‘TYPE Locality: Motzorongo, Mexico. 
Hazrat: On the ground in humus in a moist virgin forest. 
DisTRIBUTION: Known only from the type locality. 
