172 NORTH AMERICAN FLORA [VoLomE 10 
Stipe 2-2.5 cm. long; sometimes longer in N. subpectinata. 
Pileus ochraceous with subfulvous disk. 59. N. xuchilensis. 
Pileus isabelline with testaceous disk. 60. N. spinulifer. 
Pileus fulvous. 61. N. subpectinata. 
Stipe 3-4 em. long. 62, N. Earlei. ; 
Stipe 4-8 cm. long. 23. N. semiorbicularis. 
Pileus some shade of umbrinous or brown, glabrous, about 1-2 em. broad. 
Stipe 1-2 mm. thick.. 
Pileus umbonate, striate. 63. N. montana. 
Pileus neither umbonate nor striate. 64. N. Saccheri. 
Stipe 3 mm. thick. 65. N. Underwoodii. 
1. Naucoria centuncula (Fries) Gill. Champ. Fr. 545. 1876. 
Agaricus cenitunculus Fries, Syst. Myc, 1: 262. 1821. . 
Pileus subfleshy, convex-plane, obtuse, 16-22 mm. broad; surface lurid-yellowish-green 
to expallent, subsilky, the margin yellow-pulverulent; lamellae seceding, broad, thick, yellow- 
floccose on the edges, cinereo-flavid; spores ochraceous; stipe often curved and subeccentric, 
fistulose, white-pulvertilent at the apex, white-villose at the base, 2.5 em. long, 2.5 mm. thick. 
TYPE LOCALITY: Europe. 
Hasrtat: On dead wood. 
DistRiBuTION: Michigan and Nebraska; also in Europe. 
InLustRAtIoNs: Cooke, Brit. Fungi pl. 601a (495). 
2. Naucoria lenticeps (Peck) Sacc. Syll. Fung. 5: 838. 1887. 
Agaricus lenticeps Peck, Ann, Rep. N. Y. State Mus. 31: 34. 1879. 
Pileus thin, convex or nearly plane, 1.2-2 cm. broad; surface dingy-ocher or subolivaceous, 
brown or blackish-brown on the disk; lamellae plane, subdistant, adnate, with a decurrent 
tooth, whitish or pallid; spores large, variable in size, 12.5-18 X 7.5-10 w; stipe slender, hollow, 
paler and slightly squamulose at the apex, 2.5~3.5 cm. long, scarcely 2 mm. thick. 
Tyrr LocaLiry: Center, New York. 
Hapitat: In sandy soil along railroads. 
DIstRIBUTION: Known only from the type locality. 
3. Naucoria elatior (Peck) Sacc. Syll. Fung. 9: 109. 1891. 
Agaricus elatior Peck, Ann. Rep. N. Y. State Mus. 39: 41. 1887. 
Pileus thin, at first conic or subcampanulate, becoming convex or nearly plane, 1-2°cm. 
broad; surface glabrous, slightly viscid and striatulate on the margin when moist, livid or 
grayish-brown; lamellae broad, ventricose, distant, whitish or livid, becoming dark-ferruginous, 
white on the edges; spores brownish-ferruginous, oblong-ellipsoid, 17-20 X 7.5-10 u; stipe 
elongate, slender, hollow, flexuous, slightly fibrillose, pallid, 7.5-12.5 cm. long, about 2 mm. 
thick. 
TYPE LOCALITY: Karner, New York. 
Hapirat: In sphagnum. 
DIstRIBUTION: Known only from the type locality. 
4, Naucoria arenaria Peck, Bull. N. Y. State Mus. 157: 29. 1912. 
Pileus thin, convex or nearly plane, 0.75-2 cm. broad; surface glabrous, pale-yellow or 
reddish-yellow with a paler margin; lamellae broad, distant, unequal, sinuate, brownish- 
ferruginious; spores brownish-ferruginous, 15-20 X 10-124; stipe slender, rigid, glabrous, 
stuffed with a white pith, concolorous, pseudobulbous, 2-3 cm. long, 1-2 mm. thick. 
TYPE Locality: Karner, New York, 
Hapitat: In sandy soil. 
DISTRIBUTION: Known only from the type locality. 
5. Naucoria curvomarginata (Peck) Sacc. Syll. Fung. 5: 842. 1887. 
Agaricus curvomarginaius Peck, Ann. Rep. N. Y. State Cab. 23: 92. 1872. 
Pileus thin, convex, 8-12 mm. broad; surface smooth, reddish-yellow, margin paler, 
reflexed, extending beyond the lameliae; lamellae subventricose, emarginate, decurrent-toothed, 
