North American Flora: Agaricales, Agaricaceae (Vol. 10 ... - MykoWeb

12 NORTH AMERICAN FLORA [VOMJMB 10
broadly ellipsoid, often with a shining nucleus, 7.5-8.7X5-6/*; stipe short, equal or tapering
upward, hollow, slightly silky, concolorous or a little paler, 2.5-4 cm. long, 2-4 mm. thick.
TYPE LOCALITY: Sandlake, New York.
HABITAT: Gravelly soil in fields.
DISTRIBUTION : Known only from the type locality.
25. Melanoleuca magna (Banning & Peck) Murrill.
Tricholoma magnum Banning & Peck; Peck, Ann. Rep. N. Y. State Mus. 44: 179. 1892.
Pileus fleshy, hemispheric to expanded, 15 cm. broad; surface smooth, silky, cream-colored;
context white, firm; lamellae white then pale-salmon or cream-colored, adnate, emarginate,
not crowded; spores not present; stipe short, solid then hollow, base attenuate.
TYPE LOCALITY: Baltimore, Maryland.
DISTRIBUTION: Known only from the type locality.
26. Melanoleuca praemagna Murrill, sp. nov.
Pileus large and fleshy, convex to plane, becoming deeply fissured with age or on drying»
gregarious, reaching 12-20 cm. broad; surface dry, smooth, glabrous, white, margin involute
and minutely downy when young, becoming expanded and glabrous; context thick, white;
lamellae sinuate-adnexed, often with a decurrent tooth, broad, ventricose, crowded, white,
becoming dirty-yellowish or brownish on drying; spores ellipsoid, smooth, hyaline, pure-white
in mass, 6-7X3-4/*; stipe very short, thick and bulbous, smooth, glabrous, white, reaching
5-6 cm. long and 4-5 cm. thick, the bulb being nearly twice this thickness.
Type collected on the crumbling walls of an old sod-house in Saskatchewan, Canada, September
6, 1913, L. H. Pennington. Also collected on high land under sagebrush, near Gunnison, Colorado,
August 24, 1899, E. Bartholomew 2611%.
DISTRIBUTION: Saskatchewan and Colorado.
27. Melanoleuca trentonensis (Peck) Murrill.
Agaricus (Tricholoma) Irentonense Peck, Ann. Rep. N. Y. State Mus. 24: 60. 1872.
Pileus thin, convex or nearly plane, often irregular, gregarious or subcespitose, 2.5-5 cm.
Jjroad; surface glabrous or subvirgate, hygrophanous, slightly striatulate on the margin when
moist, dingy-white, the disk generally brown; lamellae very narrow, crowded, slightly emargin-
ate, white inclining to yellowish; spores ellipsoid, pointed at one end, smooth, hyaline, 5-7X3-4
M; stipe short, equal, solid, slightly striate, white, 2.5-4 cm. long, 6-10 mm. thick.
TYPE LOCALITY: Trenton Falls, New York.
HABITAT: Soil and rotten wood in woods.
DISTRIBUTION: New York.
28. Melanoleuca fumescens (Peck) Murrill.
Agaricus (Tricholoma) fumescens Peck, Ann. Rep. N. Y. State Mus. 31: 32. 1879.
Pileus convex or expanded, 2.5 cm. broad; surface dry, clothed with a very minute ap-
pressed tomentum, whitish; lamellae narrow, crowded, rounded behind, whitish or pale-cream-
colored, changing to smoky-blue or blackish when bruised or on drying; spores oblong-ellipsoid,
5-6.5 ß long; stipe short, cylindric, whitish, 2.5-4 cm. long, 4-6 mm. thick.
TYPE LOCALITY: Copake, New York.
HABITAT: Ground in woods.
DISTRIBUTION: New York.
ILLUSTRATION: Hard, Mushrooms/. 54.
29. Melanoleuca lata (Peck) Murrill.
Tricholoma latum Peck, Bull. N. Y. State Mus. 167: 31. 1913.
Pileus fleshy, firm but flexible, broadly convex or nearly plane, gregarious, reaching 5-10
cm. broad; surface moist, glabrous, white or whitish; context white, taste diagreeable; lamellae
plane or slightly arcuate in mass, narrow, close, rounded behind, adnexed, white or whitish,
becoming dingy or tinged with reddish-brown when old; spores oblong or subfusiform, 10-12X
3.5-4 ß) stipe short, nearly equal, solid or stuffed, slightly pruinose at the top, more or less
whitish-tomentose at the base, colored like the pileus, 2.5-5 cm. long, 1.5-2 cm. thick.
TYPE LOCALITY: Vaughns, New York.
HABITAT: In woods.
DISTRIBUTION : Known only from the type locality.