Part 1, 1914] AGARICAC3AE 9 



10. Melanoleuca pallida (Peck) Murrill. 



Tricholoma pallidum Peck, Bull. Torrey Club 24: 139. 1897. 



Pileus fleshy, thick at the center, convex or nearly plane, obtuse, 2.5-6.5 cm. broad; 

 surface glabrous, sometimes obscurely spotted on the disk with thin, appressed, brownish 

 squamules, somewhat shining, whitish tinged with yellow or brownish-yellow, context white, 

 sometimes slowly assuming a faint pinkish hue when bruised, taste mild; lamellae broad, sub- 

 distant, rounded behind or adnexed, often eroded on the edge, white; spores ellipsoid, 5-6X4 n\ 

 stipe equal or slightly thickened at the base, glabrous, white, 2.5-5 cm. long, 6-12 mm. thick. 



Type locality: Worcester, Massachusetts. 



Habitat: Thin deciduous woods. 



Distribution: Massachusetts, New York, and Colorado. 



11. Melanoleuca leucocephaloides (Peck) Murrill. 



Tricholoma leucocephaloides Peck, Ann. Rep. N. Y. State Mus. 49: 16. 1897. 



Pileus thin, convex, obtuse or umbonate, 4-6 cm. broad; surface yellowish or grayish- 

 brown when moist, white or whitish when dry, glabrous, hygrophanous ; context white, fari- 

 naceous; lamellae adnate or slightly emarginate, moderately close, whitish; spores ellipsoid, 

 5-6 X 4m; stipe equal or tapering upward, glabrous, sometimes mealy at the apex, whitish, 

 solid, 4-6 cm. long, 5-8 mm. thick. 



Type locality: Delmar, New York. 

 Habitat: Under pines or balsam firs. 

 Distribution: New York. 



12. Melanoleuca subacida Murrill, sp. nov. 



Pileus convex to expanded, gregarious, reaching 5-6 cm. broad ; surface smooth, glabrous, 



subviscid, white, margin incurved, entire ; context white, with a pleasant taste and the odor of 



sour dough; lamellae mostly entire, with a few short ones inserted near the margin, broad, 



sinuate, ventricose, subcrowded, pure- white, unchanging; spores subglobose, smooth, hyaline, 



granular, 5-6X4-5 /x; stipe tapering downward, smooth, glabrous, white, spongy within, 5 cm. 



long, 1 cm. thick. 



Type collected on the ground in pine woods near Auburn, Alabama, December 15, 1900, Mrs. 

 F. S. Earle. 



Distribution: Known only from the type locality. 



13. Melanoleuca unifacta (Peck) Murrill. 



Tricholoma unif actum Peck, Bull. N. Y. State Mus. 105: 36. 1906. 



Pileus fleshy but thin, convex, often irregular, sometimes eccentric because of its closely 

 cespitose mode of growth, 2.5-5 cm. broad; surface whitish; context tender, whitish, taste 

 mild, odor not decided; lamellae thin, narrow, close, rounded behind, slightly adnexed, some- 

 times forked near the base, white; spores hyaline, subglobose, 4-5 /*; stipes equal or thicker at the 

 base, solid, fibrous, white, united at the base in a large fleshy mass, 2.5-5 cm. long, 6-10 mm. 

 thick. 



Type locality: Horicon, Warren County, New York. 

 Habitat : Under hemlock trees. 

 Distribution: Known only from the type locality. 

 Illustration: Bull. N. Y. State Mus. 105: pi. 94. 



14. Melanoleuca Kauffmanii Murrill, sp. nov. 



Pileus small, thin, convex to nearly plane, cespitose, 2-5 cm. broad ; surface smooth, sub- 

 glabrous, minutely floccose on the disk, pale-brownish-cinereous with a tinge of drab, darker 

 at the center; margin thin, regular, concolorous, incurved when young or on drying; context 

 whitish, drying easily, taste mild ; lamellae somewhat decurrent, at length emarginate, plane, 

 very crowded and very narrow, pallid to drab-colored, scarcely changing when bruised, isabel- 

 line in dried specimens; spores ellipsoid, smooth, hyaline, 5-6X2-3^; stipe rather slender, 

 curved and attenuate above, nbrillose, whitish, tinged like the pileus, solid, 4-6 cm. long, 4-6 



mm. thick. 



Type collected in soil mixed with leaf -mold at Whitmore, Michigan, September 14, 1907, C. H. 



Kauffman. 



Distribution: Known only from the type locality. 



