STUDIES ON THE AGARICACEAE OF HOKKAIDO. I

32
1872.
SANSHI IMAI
Lepiota (PERS. ex FR.) QuEL.
Champ. Jura Vosg. I, in Mem. Soc. D'Emul. Montb. 2 ser. V, 60 & 70,
Agaricus § Lepiota PERS. Syn. Fung. 257, 1801, p. p.
Agaricus § Lepiota FR. Syst. Myc. I, 19, 1821.
Leucocoprinus PAT. Bull. Soc. Myc: Fr. IV, 26, 1888.
Cystoderma FAYOD, Ann. Sci. Nat., Bot. 7 ser. IX, 350, 1889.
Fusispom FAYOD, Ibid. 351, 1889.
Mastocephalus BATT. ex O. K. Rev. Gen. PI. II, 859, 1891.
Limacella EARLE, Bull. N. Y. Bot. Gard. V, 447, 1909.
Fructification with partial veil remaining later as an· annulus,
and usually with very fugacious. unIversal veil when young. Pileus
fleshy, regular, distinct from the fleshy stipe. Stipe central, fleshy.
Universal veil very fugacious. Partial veil remaining as an annulus.
Lamellae free or rarely slightly attached. Spores white in mass.
Type species: Agaricus (Lepriota) procerus ScoP. ex FR.
Key to the subgenera, sections and species in Hokkaido.
I. Pileus dry, squarrose, squamulose, fibrillose or pruinose; lamellae usually
free. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Subgen .. Eulepiota.
A. Pileus large with large scales; annulus large, movable, persistent,
distinct from the universal veil... . . . . . . . . . . . . . . . . .. Sect. Procerae.
1. Pileus with prominent umbo; context white, unchanging in color;
stipe usually with snake-like marking.......... L. procera (1).
2. Pileus not distinctly umbonate; context becoming reddish on exposure;
stipe without snake-like marking ....... L. rhacodes(2).
B. Pileus squamulose; annulus distinct, fixed, homogeneous with universal
veil which clothes the stipe. . . . . . . . . . . . . . . . . . . . .. Sect. Clypeolariae.
1. Spores large, subcylindrical, subfusiform or turbinate.
a. Pileus covered with small, rigid, apiculate, fuscous, deciduous
warts; annulus rather large; stipe robust .................. .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. L. acutesquamosa (3) .
b. Pileus covered with yellow or brownish dense felt which later
breaks up into floccose, torn patches or innate squamules, appendiculate
at the margin ................ L. clypeolaria(4).
c. Pileus covered with cinnamon or reddish-brown small scales
in concentric order......................... L. cristata (5) .
2. Spores not elongated, but ellipsoidal.
a. Stipe abruptly bulbous; pileus covered with reddish-brown
scales. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. L. subamaniti/ormis (6) .
b. Stipe not bulbous; pileus covered with reddish-brown, small
scales. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. L. helveola (7) .