North American Flora: Agaricales, Agaricaceae (Vol. 10 ... - MykoWeb

PART 1, 1914] AGARICACEAE 53
39. Lepiota roseifolia Murrill, Mycologia 4: 235. 1912.
Pileus regular, convex to subexpanded, solitary, 4 cm. broad; surface dry, shining, innate-
fibrillose, radiate-rimose, smooth and glabrous at the center, castaneous, blackish-tinged when
fresh, assuming a more reddish tint after picking; lamellae free, crowded, slightly ventricose,
regular, white when fresh, changing to rose-colored on drying or when bruised; spores ellipsoid,
smooth, hyaline, 7-8X3-3.5 ¡i; stipe equal, compressed, very long because buried in leaves,
hollow, smooth, glabrous, avellaneous-isabelline, white at the apex, 17 cm. long, 5 mm. thick;
annulus superior, slight, fixed, fuliginous.
TYPE LOCALITY: La Honda, California.
HABITAT: In humus in a redwood forest.
DISTRIBUTION: Known only from the type locality.
40. Lepiota jamaicensis Murrill, Mycologia 3: 87. 1911.
Pileus 10 cm. in diameter, convex to plane, with a prominent, hemispheric umbo, cespitóse
on dead wood, the entire sporophore becoming reddish-brown when bruised or on drying;
surface dry, white or very pale yellowish, adorned with brownish, floccose scales 1 mm. broad,
the remains of the cuticle; umbo brown, minutely scaly; context thin, white;, lamellae free,
white, becoming discolored when the spores mature; spores ovoid, rounded at both ends, not
apiculate, often uninucleate, very pale brown, 9X6-7 n; stipe enlarged at the base, tapering
upward, 10 cm. or more long, 1.7 cm. thick below, 0.7 cm. thick above, subglabrous, slightly
reddish-brown; annulus large, superior, movable, reddish-brown.
TYPE LOCALITY: Manchioneal, Jamaica.
HABITAT: On a hardwood stump in a cocoanut plantation.
DISTRIBUTION: Known only from the type locality.
41. Lepiota americana Peck, Ann. Rep. N. Y. State Mus. 49:
56. 1897.
Agaricus americanus Peck, Ann. Rep. N. Y. State Cab. 23: 71. 1872.
Pileus fleshy, ovoid to campanulate and expanded, umbonate, solitary or subcespitose,
5-10 cm. or more broad; surface radiate-fibrillose beneath the cuticle and at first white, the
cuticle brick-colored or bay-brown, at first continuous, soon breaking up except upon the
umbo into small scales, which are gradually drawn apart and scattered over the surface, sub-
striate on the margin; context thin, white, changing to dull-red or smoky-red when bruised or
on drying; lamellae rather narrow, close, free, white; spores ovoid or subellipsoid, uniguttulate,
subhyaline, 7.5-10X5-7 ¡i; stipe tapering upward from the more or less thickened and elongate
base, fistulöse, smooth, subglabrous, white, changing to red when bruised, 8-12 cm. or more
long, 4-6 mm. thick at the apex, 8-12 mm. thick at the base; annulus thin, membranous.
TYPE LOCALITY: Buffalo, New York.
HABITAT: Rich soil in grassy grounds or around old stumps, or on compost heaps.
DISTRIBUTION : New Brunswick to Alabama and west to Iowa.
ILLUSTRATIONS: Ann. Rep. N. Y. State Mus. 49: pi. 44, f. 6-10; Atk. Stud. Am. Fungi /. 82;
Mcllv. Am. Fungi pi. 15a; Mycologia 3: pi. 49, f. 6.
42. Lepiota arenicola Peck, Ann. Rep. N. Y. State Mus. 40: 59.
1887.
Pileus broadly conic to subplane, 6-12 mm. broad; surface white or cinereous, granulöse
and obscurely punctate-squamulose, margin substriate, crenulate; lamellae distant, sub-
ventricose, white; spores oblong, subfusoid, acute at the base, smooth, hyaline, 12-15X5-6 p.;
stipe equal, glabrous, whitish, stuffed, 1.5-2.5 cm. long, 5 mm. thick; annulus imperfect,
nearly obsolete.
TYPE LOCALITY: New York.
HABITAT: In sandy ground.
DISTRIBUTION: New York.