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

14 NORTH AMERICAN FLORA [VOLUME 10
35. Melanoleuca Davisiae (Peck) Murrill.
Tricholoma Davisiae Peck, Bull. Torrey Club 27: 611. 1900.
Pileus fleshy, thin except in the center, very fragile, at first rounded, becoming convex or
nearly plane, acutely or bluntly umbonate, 4-10 cm. broad; surface dry, pruinose or slightly
pulverulent, floccose-squamulose toward the margin, bright-yellow when young and often
tinged with red or green and showing changeable or iridescent hues, becoming paler with age
and assuming pinkish or salmon tints, brown or purplish-brown in the center, margin thin,
involute, often split; context white, taste farinaceous, then disagreeable; lamellae broad, sub-
distant, rounded behind and somewhat ventricose, adnexed, whitish becoming tinged with
salmon, especially on the edge; spores broadly ellipsoid or subglobose, 5-6X5 p; stipe nearly
equal, straight or curved, stuffed or slightly hollow, fibrous, penetrating the earth deeply,
white externally and within, 5-10 cm. long, 8-13 mm. thick.
TYPE LOCALITY: Falmouth, Maine.
HABITAT: Among fallen leaves in pine woods.
DISTRIBUTION: Maine.
36. Melanoleuca unakensis Murrill, sp. nov.
Pileus convex to nearly plane, gibbous, gregarious to subcespitose, reaching 5-8 cm. broad;
surface moist, smooth, glabrous, isabelline, fulvous at the center and fading toward the margin,
which is entire and sharply incurved on drying; context white, fleshy, very rigid when dry;
lamellae sinuate-adnexed, plane, crowded, firm, white tinged with rosy-isabelline; spores globose,
smooth, hyaline, 4-6/x; stipe very long, equal, smooth, subglabrous above, tomentose below,
white at the apex, changing to grayish or glaucous on drying, cream-colored below, not changing,
solid or spongy within, very rigid when dry, often twisted, about 10-13 cm. long, 1 cm.'thick.
Type collected on a dead pine log in mixed woods at Unaka Springs, Tennessee, August 18-24,
1904, W. A. Murrill 965. What appears to be the same species collected on dead wood at Rochdale,
Massachusetts, September 17, 1911, E. D. Clark.
DISTRIBUTION: Tennessee and probably Massachusetts.
37. Melanoleuca odora (Peck) Murrill.
Tricholoma odorum Peck, Bull. Torrey Club 25: 321. 1898.
Pileus fleshy, convex, becoming nearly plane or slightly depressed, subumbonate, 2.5-5
cm. broad; surface glabrous, shining when young, soft like kid, yellowish or pale-tan-colored;
context yellow, flavor at first nutty then farinaceous, odor strong, jessamine-like; lamellae
broad, rounded behind, adnexed, easily separating from the stem, thick, white or tinged with
pink; spores ellipsoid, 7.5-10X5-6^; stipe equal, sometimes slightly bulbous, stuffed, silky-
fibrillose, concolorous, but pale-yellow toward the base and white and pruinose at the top,
5-7.5 cm. long, 6-10 mm. thick.
TYPE LOCALITY: Tacoma Park, District of Columbia.
HABITAT: Among fallen leaves in moist places in woods.
DISTRIBUTION: Known only from the type locality.
38. Melanoleuca Thompsoniana Murrill.
Agaricus (Tricholoma) flavescens Peck, Bull. Buffalo Soc. Nat. Sei. 1: 42. 1873. Not A. flavescens
Walk. 1833.
Pileus large and attractive, convex to plane with a broad umbo, sometimes splitting with
age, gregarious, reaching 10 cm. broad; surface dry, glabrous, somewhat rimóse, flavous over
the whole surface when young, becoming dark-luteous at the center and flavous or cream-
colored toward the margin; context thin, white or yellowish; lamellae adnate, becoming slightly
sinuate and seceding, rather crowded and narrow, lemon-yellow when young, becoming flavo-
luteous with age, brownish on drying; spores subglobose, smooth, hyaline, 5-7 ¿u; stipe long,
equal, longitudinally striate, glabrous, lemon-yellow, fleshy, firm, 14 cm. long, 2-2.5 cm. thick.
TYPE LOCALITY: Bethlehem, New York.
HABITAT: On and about old pine stumps.
DISTRIBUTION: New York, Massachusetts, and North Carolina.