Part 2, 1917] AGARICACEAE 89 
10. Leptoniella parva (Peck) Murrill. 
Leptonia parva Peck, Ann. Rep. N. Y. State Mus. 45: 78 (18). 1893. 
Pileus thin, convex or nearly plane, umbilicate, about 12 mm. broad; surface slightly 
radiate-striate, violaceous-brown, darker and squamulose on the umbilicus; lamellae sub- 
distant, adnate, whitish tinged with flesh-color; spores irregular or angular, uninucleate, about 
7.5 X 6 yu; stipe slender, glabrous, solid, concolorous, about 2.5 cm. long, scarcely 2 mm. thick. 
Tyre LocaLity: Lake Pleasant, Hamilton County, New York. 
Hasirat: In woods. 
DIstRIBUTION: Maine and northern New York. 
11. Leptoniella aeruginosa (Peck) Murrill. 
Lepionia aeruginosa Peck, Bull. Torrey Club 26: 65. 1899. 
Pileus thin, convex, umbilicate or centrally depressed, 1.5~2.5 em. broad; surface striate, 
aeruginous, fading with age to an ashy-green hue; lamellae broad, subdistant, adnate, aeru- 
ginous, tinged with flesh-color when mature; spores angular, 7.5-10 » long, usually containing 
a single large nucleus; stipe slender, glabrous, hollow, concolorous, about 2.5 cm. long and 
2 mm. thick. 
‘TYPE LocaLity: Oxbow River, Canada. 
Hasirat: In shaded places in woods. 
DIsTRIBUTION: Known only from the type locality. 
12. Leptoniella foliomarginata (Peck) Murrill. 
Agaricus foliomarginatus Peck, Bull. Buffalo Soc. Nat. Sci. 1: 49. 1873. 
Agaricus marginatus Peck, Ann. Rep. N. Y. State Mus. 26: 56. 1874. 
Leptonia marginaia Sacc. Syll. Fung. 5: 710. 1887. 
Pileus convex, umbilicate, 2.5-5 cm. broad; surface bluish-brown, scabrous and a little 
darker on the disk; lamellae broad, subdistant, plane, whitish, becoming flesh-colored, the 
edges entire and colored like the pileus; stipe smooth, equal, concolorous, solid at the base, 
with a small cavity at the apex, 1.2-2 cm. long, 1 mm. thick. 
TYPE Locality: Maryland, New York. 
HasitaTt: On the ground and on decaying wood in groves. 
DistRIBUTION: Known only from the type locality. 
13. Leptoniella columbaria (Bull.) Murrill. 
Agaricus columbarius Bull. Herb. Fr. pl. 413, f. 1. 1788. 
Agaricus serrula Pers. Syn. Fung. 463. 1801. 
Agaricus serrulatus Fries, Syst. Myc. 1: 204. 1821. 
Leptonia serrulaia Quél. Champ. Jura Vosg. 88. 1872. 
Pileus thin, hemispheric to expanded, umbilicate, 2-4 cm. broad; surface squamulose, 
bluish-black, often becoming grayish-brown with age, margin not striate; lamellae adnate, 
separating, broad, salmon-colored, black and serrulate on the edges; spores ellipsoid, angular, 
irregular, apiculate, uniguttulate, rose-colored, 8-10 X 6-7 u; stipe glabrous, black or bluish, 
black-punctate at the apex, hollow, 4-6 cm. long, 2-3 mm. thick. 
TYPE LOCALITY: France. | 
Hasirat: Among humus in woods. : 
DISTRIBUTION: Maine to Wisconsin and Ohio; also in Europe. 
ILLUSTRATIONS: Bull. Herb. Fr. pl. 413, f. 1; Gill. Champ. Fr. pl. 273 (437); Hard, Mushr. 
f. 207 
14. Leptoniella multicolor Murrill. 
Agaricus variicolor Berk. & Curt. Ann. Mag. Nat. Hist. III. 4: 290. 1859. Not A. variecolor Pers. 
1801 
Leptonia variicolor Sacc. Syll. Fung. 5: 715. 1887. 
Pileus umbilicate, cespitose, 1.25-4 cm. broad; surface smooth, glabrous, pale-fuscous; 
context thin; lamellae adnate, broad, distant, abruptly attenuate behind, pale-purplish- 
white; spores irregular, 8 long; stipe glabrous, greenish-blue, stuffed with woolly fibers, 
5 em. long, 3 mm. thick. 
Typz Locality: Connecticut. 
Hasrrat: Among bushes on damp ground. . 
DISTRIBUTION: Known only from the type locality. 
