STUDIES ON THE AGARICACEAE OF HOKKAIDO. I

40 SANS HI IMAI
Agaricus spherosporus KROMBH. Abbild. Schwamm. IV, 10, pI. 24, f. 19-23,
1836.
Agaricus laevis KROMBH. Ibid. 16, pI. 26, f. 16-17, 1936.
Agaricus (Lepiota) naucinus FR. Epicr. Myc. 16, 1838; Hymen. Eur. 34,
1874-CKE. Ill. Brit. Fung. pI. 15, 1883-WINT. Die Pilze, I, 838, 1884.
Agaricus (Annularia) laevis FR. Hymen. Eur. 184, 1874.
Agaricus (Lepiota) naucinoides PK. 29 Ann. Rep. N. Y. State Mus. 66,
1876.
Lepiota pudica QUEL. Ench. Fung. 7, 1886.
Lepiota naucinoides MORG. Journ. Myc. XIII, 10, 1907.
Solitary or gregarious, edible. Pileus 5-13' cm. broad, conical
or subglobose, then convex, at length slightly depressed in the center;
surface white, sometimes light drab or yellowish, smooth, rarely
cracked at the center, pruinose; context fleshy, thick, white, taste
and odour mild; lamellae free or remote, close, white, gradually
'changing to pinkish, pinkish-brown when dried; stipe 8-15 cm. long,
7.5-17 mm. thick, almost equal, but enlarged at the base, white"
pinkish brown when dried, silky shining, smooth, glabrous, hollow;
annulus white, superior, narrow, somewhat thick, persistent, often
fugacious; spores white or slightly pinkish in mass, obovate-ellip­
Boidal or rarely oblong, hyaline or faintly pinkish, 7-12.5 (rarely
up to 18) x 4.5-7.5 p, mostly 9-10 x 6 f1 •
Hab. on the ground in pastures, fields, roadsides, etc. Summer
to autumn. Ishikari (Sapporo).
Distr. Japan (Hokkaido), Europe, North America and Australia.
Jap. name. Shiro-karakasatake (IMAI).
9. Lepiota seminuda (LASCH) GILL.
Hymen. Fr. 71, 1874-QUEL. Ench. Fung. 8, 1886-SACC. Syll. Fung.
V, 50, 1887; FI. Itai. Crypt., Hymen. 88, 1915-BARLA, Champ. Alp. Marit. 31,
1888-MASS. Brit. Fung. FI. III, 252, 1893-W. G. SM. Brit. Basid. 25, 1908-
MURRILL, North Amer. FI. X, 48, 1914-RICKEN, BUitterp. 324, 1915-REA,
Brit. Basid. 78, 1922.
Agaricus seminudus LASCH, Linnaea, III, 157, 1828-FR. Epicr. Myc. 18,
1838; Hymen. Eur. 38, 1874-CKE. Ill. Brit. Fung. pI. 19, f. a, 1883-WINT. Die
Pilze, I, 835, 1884.
Gregarious. Pileus 1-2.5 cm.· broad, hemiglobose or conical,
then umbonate; surface dry, pulverulent, salmon-buff or onion-skinpink
in young stage, then turning to whitish, darker at the center,