STUDIES ON THE AGARICACEAE OF HOKKAIDO. I

STUDIES ON THE AGARICACEAE OF HOKKAIDO. 1. 5
Key to the genera in Tribe Amaniteae.
1. Fructification with volva and annulus .......................... Amanita.
2. Fructification with volva, without annulus .................. Amanitopsis.
3. Fructification with annulus, without volva ...................... Lepiota.
Amanita (PERS. ex FR.) QUEL. emend. ROZE
Bull. Soc. Bot. Fr. XXIII, 51 & 114, 1876.
Amanita PENS. Syn. Fung. 246, 1801, p. p.
Agaricus § Amanita FR. Syst. Myc. I, 12, 1821, p. p.
Amanita QUEL. Champ. Jura Vosg. I, in Mem. Soc. D'Emul. Montb. 2 ser.
V, 60 & 65, 1872, p. p.
Venenarius EARLE, Bull. N. Y. Bot. Gard. V, 450, 1909.
Leucomyces EARLE, Ibid. V, 451, 1909.
Fructification with volva and annulus. Pileus fleshy, regular,
distinct from stipe. Stipe central, fleshy. Partial veil remaining as
a membranous, persistent or rarely fugacious, adnate annulus when
matured. Universal veil remaining as a membranous, free or adnate
and persistent, or powdery friable vol va at the base of stipe and
patches or warts on the pileus when matured. Lamellae free, rarely
subadnate or subdecurrent by a tooth. Spores white in mass.
Type species: Agaricus phaUoides FR.
Key to the sections and species in Hokkaido.
1. Universal veil forming a large, deep and free cup-shaped volva at the base
of stipe ............................................... Sect. Volvatae.
A. Pileus, lamellae and stipe white.
1. Pileus at first conical then expanded to subumbonate; stipe
evidently squamulose............................ A. virosa (1) .
2. Pileus at first semiglobose then expanded to obtuse convex; stipe
smooth or fibrous ............................... " A. verna (2).
B. Pileus yellow, orange or scarlet.
1. Pileus scarlet or orange; lamellae bright y()llow; stipe and annulus
yellow or bright orange ........................ A. Caesal·ea(3).
2. Pileus yellow or yellowish brown; lamellae and annulus white;
stipe white or yellowish and with yellowish brown colored squamules
.................................... A. subjunquillea(4).
C. Pileus gray, brown or bluish brown.
1. Pileus even or very shortly striate ............. A. }Jhalloides(5).
2. Pileus long striate ........ : ................. A. longistriata(6).