Nov. 1906]A T orth American Species of Lepiota 
243 
Growing in the woods among the old leaves. New York, 
Peck; Preston, O. Pileus 2-4 cm. in diameter, the stipe 4-5 cm. 
long and 3-5 mm. thick. A rare plant. 
43. LEPIOTA ARENICOLA Peck, 41 N. Y. Report, 
1887. Syll. IX, 6. 
Pileus at first broadly conical, then convex or nearly plane; 
the surface obscurely punctate with minute granular scales, 
whitish or cinereous; the margin substriate and crenulate; the veil 
thin and fragile, evanescent. Stripe arising from a mycelial bulb, 
slender, equal, stuffed, glabrous, whitish. Lamellae broad, dis¬ 
tant, free, white; spores oblong or subfusiform, acute at one end, 
12-15 x 5-6 mic. 
Growing in sandy ground, New York, Peck. Pileus 6-12 
mm. in diameter, the stipe 16-24 mm. in length, and about 1 mm. 
in thickness. The species is apparently rare. 
44. LEPIOTA MUTATA Peck, Bull. Torr. Club, 1895, 
Sylloge XIV. 66. 
Pileus fleshy, convex, subumbonate; the flesh thin and white; 
the dermis slightly scabrous in the center, white, brown in the 
dried plant. Stipe slender, equal, hollow, white; the annulus 
small, sometimes evanescent. Lamellae close, thin; subventri- 
cose, free, white; spores elliptic, 8-11 x 5-6 mic. 
Growing on the ground in woods, Kansas, Bartholomew. 
Pileus 2-4 cm. in diameter, the stipe 2-3 cm. long and 2-5 mm. 
in thickness. 
45. LEPIOTA ALLUVIINA Peck, 35 N. Y. Rep. 1882. 
Pileus fleshy, convex or plane, sometimes reflexed on the 
margin; the flesh thin, white; the dermis radiately fibrillose, sep¬ 
arating into minute, pale yellow scales. Stipe slender, tapering 
upward from a slightly thickened base, whitish or pallid, the 
cuticle fibrillose; annulus thin, membranaceous, subpersistent, 
often near the middle of the stipe. Lamellae close, free, white or 
yellowish; spores elliptic, 6-8 x 4-5 mic. 
Growing in alluvial soil among weeds. New York, Peck; 
Michigan, Longyear. Pileus 12-25 mm * m diameter, the stipe 
3-5 cm. long and 2-3 mm. thick. In drying the whole plant as¬ 
sumes a rich yellow hue. 
b. Scales of the pileus red, rufous, fulvous. 
46. LEPIOTA CONSPURCATA, Agaricus conspur- 
CATUS WlLLDENOW, PRODR. Fl. BeRL. 1787. AGARICUS CRIS- 
tatus Bolton, Hist. Fung. 1788. 
Odor strong, taste very disagreeable. Pileus fleshy, ovoid 
then campanulate and explanate, umbonate; the flesh very thin, 
