8 NORTH AMERICAN FlvORA [Vovjms 10 



6. Melanoleuca acris (Peck) Murrill. 



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



Pileus fleshy, but rathei* thin, broadly convex to nearly plane, slightly depressed in the 

 center, 4-6.5 cm. broad; surface dry, innately fibrillose, whitish or pale-gray, margin wavy; 

 context white or whitish, taste acrid; lamellae close, adnexed, subventricose, white; spores 

 subglobose, 5-6 X 4-5 p ; stipe equal or slightly tapering downward, short, slightly fibrillose, 

 stuffed or hollow, white, 2.5-5 cm. long, 6-10 mm. thick. 



Type locality: Worcester, Massachusetts. 



Habitat: Thin deciduous woods. 



Distribution: New England to Virginia and west to the Rocky Mountains. 



7. Melanoleuca albissima (Peck) Murrill. 



Agaricus (Clitocybe) albissimus Peck, Bull. Buffalo Soc. Nat. Sci. 1: 45. 1873. 

 Agaricus (Tricholoma) alboides Peck, Ann. Rep. N. Y. State Mus. 32: 25. 1880. 

 Agaricus (Clitocybe) patuloides Peck, Ann. Rep. N. Y. State Mus. 32: 25. 1880. 

 Clitocybe subsimilis Peck, Ann. Rep, N. Y. State Mus. 41: 61. 1888. 

 Tricholoma nobile Peck, Ann. Rep. N. Y. State Mus. 42: 113. 1889. 

 Clitocybe piceina Peck, Bull. Torrey Club 31: 178. 1904. 



Pileus fleshy, tough, convex, becoming plane or depressed, obtuse, slender or robust, 

 solitary to cespitose, 5-10 cm. broad; surface very dry, smooth, glabrous, white, sometimes 

 yellowish and slightly pruinose on the disk, rarely wholly yellowish, margin at first involute; 

 context white, odor often decided, taste acrid or bitter; lamellae emarginate with adecurrent 

 tooth, crowded to subdistant, distinct, whitish, yellowish when bruised; spores subglobose to 

 broadly ellipsoid, minutely asperulate, hyaline, 5-7 X 4-6 \x ; stipe solid, elastic, equal or tapering 

 upward, externally fibrous, obsoletely pruinose at the apex, often tomentose at the base, 

 white, 5-10 cm. long, 8-16 mm.Jthick. 



Type locality : Croghan, New York. 



Habitat: In leaf -mold in coniferous or mixed woods. 



Distribution: Canada to Virginia and west to Michigan. 



Illustration : Hard, Mushrooms /. 52, 



ExsiccaTi: Shear, N. Y. Fungi 5. 



8. Melanoleuca luteomaculans (Atk.) Murrill. 



Tricholoma luteomaculans Atk. Ann. Myc. 7: 376. 1909. 



Pileus convex to expanded, depressed, somewhat undulate, solitary, 5-7 cm. broad; surface 

 white tinged with yellow, changing to sulfur-yellow when bruised, margin with short, distant, 

 radiating furrows; context firm, taste rather unpleasant; lamellae emarginate, crowded, white 

 becoming dingy; spores subglobose, smooth, granular, 4-5X3.5-4.5 fx; stipe enlarged below, 

 whitish tinged with yellow, floccose-scaly with sordid-yellow scales, 4-5 cm. long, about 1 cm. 

 thick. 



Type locality: Enfield Gorge, Ithaca, New York. 

 Habitat: On the ground among leaves. 

 Distribution : New York and North Carolina. 



9. Melanoleuca silvatica (Peck) Murrill. 



Tricholoma silvaticum Peck, Ann. Rep. N. Y. State Mus. 42: 113. 1889. 



Pileus convex or nearly plane, subumbonate, small, well-formed, 2.5-4 cm. broad; surface 

 dry, glabrous, whitish; margin decurved; context thin, white, with farinaceous taste but no 

 odor; lamellae broad, ventricose, subdistant, adnexed, white, deeply sinuate; spores large, 

 ellipsoid, 11-12.5X7.5 /*; stipe equal or slightly tapering upward, glabrous or obscurely fibril- 

 lose, slightly mealy or pruinose at the apex, solid, firm, 2.5-5 cm. long, 4—8 mm. thick. 



Type locality: North Elba, New York. 

 Habitat: Among mosses or fallen leaves in woods. 

 Distribution: Known only from the type locality. 



Illustrations: Ann. Rep. N. Y. State Mus. 42: pi. 2 t /. 16-19; Bull. N. Y. State Mus. 67: 

 pi. 82, /. 1-6. 



