Part 2, 1917] AGARICACEAE 91 
20. Leptoniella longistriata (Peck) Murrill. 
Leptonia longistriata Peck, Bull. N. Y. State Mus. 150: 57. 1911. 
Pileus conic or convex, submembranous, fragile, umbilicate, 1-1.5 cm. broad; surface 
subhygrophanous, squamulose, striatulate nearly or quite to the umbilicus both when moist 
and when dry, grayish-brown; lamellae thin, fragile, subdistant, eroded or wavy on the edges, 
whitish, becoming flesh-colored; spores irregular or angular, uninucleate, 12-16 X 8-10 un; 
stipe straight, slender, tough, glabrous, shining when dry, hollow, concolorous, with white 
mycelium at the base, 3-5 cm. long, 1—2 mm. thick. 
TYPE LOcALIry: Stow, Massachusetts. 
Hazirat: On the ground by roadsides. 
DIsTRIBUTION: Massachusetts. 
21. Leptoniella grisea (Peck) Murrill. 
Leptonia grisea Peck, Ann. Rep. N. Y. State Mus. 45: 79 (19). 1893. 
Pileus broadly convex or plane, umbilicate, 1.2-2.5 em. broad; surface striatulate when 
moist, grayish-brown, glabrous, except on the umbilicus, which is squamulose; lamellae broad, 
subdistant, grayish; spores subglobose, angular, uninucleate, 7.5~10 4; stipe slender, hollow, 
glabrous, concolorous, 3.5-6 cm. long, 2 mm. thick. 
Type Locatity: Lake Pleasant, New York. 
Hasirat: Among sphagnum or on the ground in wet woods. 
DISTRIBUTION: Maine and New York. 
22. Leptoniella umbilicata Murrill, sp. nov. 
Pileus thin, convex, deeply umbilicate, solitary, 2 cm. broad; surface smooth, uniformly 
pale-grayish-brown, fibrillose-scaly, margin entire, concolorous, not striate; lamellae adnexed 
or subadnate, distant, plane, rather narrow, pallid to salmon-colored, entire and concolorous 
on the edges; spores broadly ellipsoid, irregular, angular, obliquely apiculate, rose-colored, 
8-10.5 X 7 w; stipe slender, equal, cartilaginous, solid, smooth, glabrous, pallid, 4 cm. long, 
2 mm. thick. 
Type collected in soil by the roadside in mixed woods at West Park, New York, July 30, 1903, 
F. S. Earle 1580 (herb. N. Y. Bot. Gard.). 
DistTRiBvrion: Connecticut and New York. 
23. Leptoniella validipes (Peck) Murrill. 
Leptonia validipes Peck, Mycologia 5: 70. 1913. 
Pileus thin, membranous, convex, slightly depressed at the center or subu mbilicate 
fragile, gregarious, 2-3 cm. broad; surface minutely squamulose, dark-gray or grayish-brown; 
lamellae thin, crowded, entire on the edges, adnate, white and smooth, becoming pink and 
dusted with the spores, which are angular, apiculate, uninucleate, 10-12 X 6-8 y; stipe stout 
but fragile, pruinose at the apex, flexuous, hollow, sometimes twisted, often bent at the 
base, pale-violet-gray above, white below with white mycelium at the bases 3-6 cm. long, 2~3 
mm. thick. 
TYPE Locality: Stow, Massachusetts. 
Hasrrat: On humus in swamps. . 
DISTRIBUTION: Known only from the type locality. 
24. Leptoniella abnormis (Peck) Murrill. 
Leptonia abnormis Peck, Jour. Myc. 14; 2. 1908. 
Pileus thin, convex, broadly umbilicate, 2-2.5 em. broad; surface glabrous, hygrophanous, 
blackish-brown, shining and obscurely striatulate on the margin when moist, dark-grayish- 
brown when the moisture has escaped; context concolorous; lamellae broad, subdistant, slightly 
rounded behind, adnexed, pinkish or pale-flesh-colored when mature; spores broadly ellipsoid 
or subglobose, 6-7 X 5-6 u; stipe equal, glabrous, hollow, whitish, 2.5 cm. long, 2 mm. thick. 
Type Locality: Ellis, Massachusetts. 
Haprrat: Damp soil at the edge of deciduous woods. 
DISTRIBUTION: Massachusetts. 
