108 NORTH AMERICAN FLORA [VotumE 10 
fibrous-striate and colored like or a little paler than the pileus in the upper part, even and white 
toward the base, 7.5—-10 cm. long, 4-6 mm. thick. 
Tyre Locality: Bolton Landing, New York. 
Hasirat: Among fallen leaves in woods. 
DISTRIBUTION: Known only from the type locality. 
In.ustrations: Bull. N. ¥. State Mus. 105: ol. S, f. 5-8. 
22. Pleuropus abortivus (Berk. & Curt.) Murrill, Mycologia 3: 280. 
1911. 
Agaricus abortivus Berk. & Curt. Ann. Mag. Nat. Hist. III. 4: 289. 1859. 
Clitopilus abortivus Sacc. Syll. Fung. 5: 701. 1887. 
Pileus of developed form fleshy, firm, convex to nearly plane or slightly depressed, usually 
entire on the margin, gregarious or cespitose, 5-10 cm. broad, the hymenophores very com- 
monly represented by subglobose, aborted masses of cellular tissue 3-6 cm. in diameter; surface 
of developed form dry, silky-tomentose, becoming glabrous, gray or grayish-brown; context 
white, with farinaceous odor and taste; lamellae adnate, crowded, thin, strongly decurrent, 
whitish or pale-grayish, changing to salmon-colored; spores angular, uniguttulate, salmon- 
colored, 8.5-10 X 6-7.5 4; stipe subequal, solid, slightly flocculose, longitudinally striate, 
concolorous or paler than the pileus, 3.5-8 em. long, 5-12 mm. thick. 
TYPE LocaLiry: New England. 
Hasirat: On rich earth or much decayed wood in deciduous and coniferous woods. 
DIstrRIBuTION: Canada to Alabama and west to Wisconsin; alsoin Jalapa and the Tepeite 
Valley, Mexico. 
Intusrrations: Bull. N. Y. State Mus. 10: i. 78, f. hae Hard, Mushr. f. 202, 203; 
Mellv. Am. Fungi ed. 2. pl. 63, f. 1-3; Mycologia 4: pl. 56, f.1 
Exsiccati: Barth. Fungi Columb. 4517; Shear, N Y. tenet 106. 
23. Pleuropus pascuensis (Peck) Murrill. 
Agaricus pascuensis Peck, Ann. Rep. N. Y. State Mus. 39: 39. 1887. 
Clitopilus pascuensis Peck, Ann. Rep. N. Y. State Mus. 42: 41. 1889. 
Pileus fleshy, compact, centrally depressed, solitary or gregarious, 5-7.5 cm. broad; 
surface glabrous, reddish or pale-alutaceous, the cuticle of the disk cracking into minute 
areas; context having a farinaceous taste; lamellae rather narrow, crowded, decurrent, whitish, 
“becoming flesh-colored; spores subellipsoid, pale-incarnate, 7.5-10 X 5-6 yw; stipe short, equal 
or tapering downward, solid, glabrous, concolorous, 1.5-3.5 cm. long, 8-12 mm. thick. 
TYPE LOCALITY: Day, Saratoga County, New York. 
Hapsirat: In pastures. 
DistRIBUTION: Known only from the type locality. 
24. Pleuropus irregularis (Peck) Murrill. 
Clitopilus irregularis Peck, Bull. Torrey Club 26: 65. 1899. 
Pileus thin, irregular, sometimes eccentric, nearly plane, usually cespitose, 2.5 cm. broad; 
surface glabrous, reddish-brown; context white; lamellae rather broad, subdistant, decurrent, 
whitish, becoming tinged with flesh-color; spores ellipsoid, pale-flesh-colored, 6-7 X 3-4»; 
stipe short, solid or spongy within, externally fibrous, concolorous, about 2.5 cm. long, 2-4 mm. 
thick. 
Type Locatity: London, Ontario, Canada. 
Hasrrat: Manured, ground. 
DistRIBUTION: Known only from the type locality. . 
25. Pleuropus erythrosporus (Peck) Murrill. 
Clitopilus erythrosporus Peck, Ann. Rep, N. Y. State Mus. 41: 64. 1888. 
Pileus thin, hemispheric or strongly convex, 2.5-5 cm. broad; surface glabrous or merely 
pruinose, grayish-incarnate; context whitish with an incarnate tint, the taste farinaceous; 
lamellae narrow, crowded, arcuate, strongly decurrent, concolorous; spores ellipsoid, rosy-red, 
5 X 3-4 yu; stipe equal or slightly tapering upward, hollow, slightly pruinose at the apex, con- 
colorous, 2.5—3.5 em. long, 6-12 mm, thick. 
TYPE Locatity: Catskill Mountains, New York. 
Hagitat: On decayed wood and among fallen leaves in woods. 
DISTRIBUTION: New York. 
