122 NORTH AMERICAN FLORA [VotumE 10 
brinous, usually darker on the umbo, the cuticle often cracking radially with age, margin con- 
colorous, irregular, usually lobed or split in large specimens; context thin, white, with fari- 
naceous odor and taste; lamellae more or less sinuate, rather narrow, not crowded, soon be- 
coming rose-colored; spores globose, decidedly angular, apiculate, uniguttulate, rose-colored, 
copious, 6-8 2; stipe equal, rather short, often twisted, pruinose at the apex, polished and 
asbestos-like below, white or pale-avellaneous, 4-5 cm. long, 3-6 mm. thick. 
Type collected in wet soil in oak woods near the New Vork Botanical Garden, September 10, 
1910, W. A. Murrill (herb. N. Y. Bot. Gard.). 
HasBiraT: On the ground in woods. 
DistTRIBUTION: New England to the mountains of Virginia. 
45. Entoloma plumbeum Earle, Bull. N. Y. Bot. Gard. 3: 298. 
1905. 
Pileus irregular, often asymmetrical, expanded or at length depressed, subgregarious, 
4-7 cm. broad; surface smooth, not hygrophanous, pale-lead-colored, often with a brownish 
tint, usually darker at the center, margin irregular, not striate; context white or cream-colored, 
unchanging, the taste and odor mild; lamellae narrowly sinuate, crowded, strongly hetero- 
phyllous, rather narrow, plane or subventricose, cream-colored, becoming tinged with salmon; 
spores pale-salmon-colored, ellipsoid, smooth, often with a large central vacuole, about 7 X 5 4; 
stipe equal, subglabrous or subfibrillose, subconcolorous, sordid, solid, fleshy-fibrous, 2-3 cm. 
long, 6-7 mm. thick. 
Type LOCALITY: Palo Alto, California. 
Hasrirat: In old pastures. 
DIsTRIBUTION: Known only from the type locality. 
46. Entoloma alcalinum Murrill, sp. nov. : 
Pileus firm, convex, umbonate, gregarious or cespitose, 3-5 cm. broad; surface dry, 
lacerate, grayish-brown, margin concolorous, incurved, irregular, not striate; context white, 
with alkaline taste; lamellae sinuate, broad, rounded in front, subdistant, undulate on the 
edges, salmon-colored; spores subglobose angular, rose-colored, 8-10 yw; stipe cylindric, equal, 
white, striate, pruinose at the apex, solid or stuffed, 4 cm. long, 7 mm. thick. 
Type collected on a lawn at Minneapolis, Minnesota, September 3, 1915, Mary E. Whetstone 
& N. Darrow 63 (herb. N. Y. Bot. Gard.). 
DisTRIBUTION: Known only from the type locality. 
47. Entoloma griseum Peck, Bull. N. Y. State Mus. 75: 14. 1904. 
Pileus fleshy, firm, broadly campanulate or convex, obtuse or slightly umbonate, often 
irregular, 4-7.5 cm. broad; surface glabrous, hygrophanous, grayish*brown when moist, paler 
when dry; context whitish, the odor and taste farinaceous; lamellae adnexed, emarginate, 
decurrent with a tooth, about 4 mm. broad, pale-pink; spores subglobose, angular, 7.5 « in 
diameter; stipe equal or slightly tapering upward, silky-fibrillose, pruinose at the apex, stuffed 
or hollow, grayish-white, 2.5-5 cm. long, 6-10 mm. thick. 
TyPE LocALity: Lake Pleasant, New York. 
Hasirat: On the ground in moist woods. 
DistRIBuTION: Northern New York and the mountains of North Carolina. 
48. Entoloma avellaneum Murrill, sp. nov. 
Pileus convex to nearly plane, not umbonate, circular to somewhat irregular, solitary, 
reaching 3-4 cm. broad; surface smooth, dry, glabrous, not: striate, uniformly avellaneous, 
margin concolorous, undulate or slightly lobed; lamellae not crowded, rather broad, ventricose, 
sinuate, white to salmon-colored, somewhat uneven on the edges; spores broadly ellipsoid, 
slightly angular or irregular, apiculate, rose-colored, 7 X 5; stipe tapering upward, white, 
hollow, smooth, nearly glabrous above, densely clothed with whitish tomentum below and 
whitish-mycelioid at the base, 5-6 cm. long, 3-6 mm. thick. 
Type collected on a much decayed coniferous log in coniferous woods at Lake Placid, Adiron- 
dack Mountains, New York, October 3-14, 1912, IV. A. & Edna 1. Murrill 495 (herb. N. Y. Bot. 
Gard.). 
Hasirat: On much decayed wood or humus. 
DistrieutTion: Adirondack Mountains, New York. 
