14 NORTH AMERICAN FLORA [Voiajms 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 /*; 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 fi ; 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 locai«ity: 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) Jlavescens Peck, Bull. Buffalo Soc. Nat. Sci. 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 rimose, 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 m; 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. 



