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

PART 1, 1914] AGARICACEAE 27
96. Melanoleuca bicolor Murrill, Mycologia 5: 215. 1913.
Tricholoma bicolor Murrill, Mycologia S: 223. 1913.
Pileus very firm, convex to nearly plane, somewhat gibbous, about 6-12 cm. broad; surface
dry, smooth, glabrous, avellaneous with a rosy tint, margin concolorous or slightly paler, often
splitting; lamellae broad, rather close, emarginate with a slight decurrent tooth, firm, drying
readily, white; spores subglobose, smooth, hyaline, 6-7 yu; stipe equal or somewhat enlarged
below, white, smooth, minutely tomentose to glabrous, solid, 5-6 cm. long, about 1 cm. thick.
TYPE LOCALITY: Glen Brook, Oregon.
HABITAT : In humus in woods, and on the ground under an oak.
DISTRIBUTION: Oregon and California.
97. Melanoleuca roseibrunnea Murrill, Mycologia 5: 220. 1913.
Tricholoma roseibrunneum Murrill, Mycologia S: 223. 1913.
Pileus convex to somewhat depressed, gregarious, reaching 8-10 cm. broad; surface smooth,
dry, glabrous, brownish-pink with browner circular spots, margin paler with a cremeous tint,
somewhat irregular and often upturned with age; context white, odor farinaceous, taste fari-
naceous with a faint bitter flavor which gradually becomes stronger, eaten by slugs; lamellae
sinuate with a decurrent tooth, close, several times inserted, white; spores subglobose to ovoid,
smooth, hyaline, 5-7X4-5 p; stipe cylindric, equal or at times enlarged at the base, smooth,
finely tomentose to subglabrous, white or whitish, solid, 6-8 cm. long, 1•1.5 cm. thick, usually
thicker at the base.
TYPCE LOCALITY: Seattle, Washington.
HABITAT: Among humus on the ground in woods.
DISTRIBUTION: Washington, Oregon, and California.
98. Melanoleuca nuciolens Murrill, Mycologia 5: 218. 1913.
Tricholoma nuciolens Murrill, Mycologia 5: 223. 1913.
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 ellipsoid, smooth, hyaline, 6 X3.5 ¡i; stipe equal or slightly tapering
upward, sometimes distorted in old specimens, smooth, glabrous, pallid, hollow, almost car-
tilaginous, about 5-6 cm. long, 1-1.5 cm. thick.
TYPE LOCALITY: Seattle, Washington.
HABITAT: In sandy soil in woods.
DISTRIBUTION: Known only from the type locality.
99. Melanoleuca subvelata Murrill, Mycologia 5: 222. 1913.
Tricholoma subvelalum Murrill, Mycologia 5: 223. 1913.
Pileus convex-conic when young, not fully expanding, loosely clustered, 3-5 cm. broad;
surface smooth, glabrous, moist but not viscid, latericious, leaving a stain on paper, margin
entire, strongly infiexed, concolorous or somewhat paler; lamellae sinuate-adnate to adnexed,
not crowded, broad, ventricose, pallid; spores ovoid, smooth, hyaline, uninucleate, 5-7X2.5-
4.5 p; stipe subequal to slightly ventricose, rosy, smooth and glabrous at the apex, fibrillose-
shaggy near the center, fleshy, solid, 7 cm. long, about 1 cm. thick; veil scanty, fibrillose, rosy,
evanescent, persisting as fibrils on the margin and stipe.
TYPE LOCALITY: Seattle, Washington.
HABITAT: Among humus under a log in woods.
DISTRIBUTION: Known only from the type locality.
100. Melanoleuca collybiiformis. Murrill, Mycologia 5: 216. 1913.
Tricholoma collybiiforme Murrill, Mycologia 5: 223. 1913.
Pileus broad, thin, convex to plane, drying easily like species of Collybia, gibbous, reaching
10 cm. broad; surface dry, smooth, glabrous, fulvous at the center, pale-fulvous near the entire,