Friesia IV, 1-2

- 40 -
l. Psalliota vaporaria (VITT.) MØLL. et SCHAEFF.
Fig. 8.
F. H. M ø Il e r et J. S c h a f f e r, Ann. Myc. 36, p. 71, 1938.
Syn.: Agaricus campestris, B. praiensis, vaporarius Vitt.
campestris var. villaticus Brond. sensu Cooke, Illu­
str. t. 585, no. 548. 1881-1891.
Psalliota set ig era (Paul.) Fr. sensu Ricken, Vademecum,
no. 1006, 1920 .
Psalliota bivelata Vel. (non Peck 1909) , Ceske houby, p. 562,
1921.
Icon. : V i t t a d i n i, Funghi mango et vel. d'Italia, t. VIII, 1835.
J . S c h a f f e r: Michael, Fiihrer f. Pilzfreunde, no. 50, 1939.
J. V'e l e n o v s k y , Mykologia IV, t . 5, 1927.
P i l e u s 10-15 cm, thick and firm, convex with flattened cen­
tre, shining, sooty brown, tobacco brown, or potato brown ("Snuff
Brown", "Biste r " ) with pellicle for the most part soon breaking
up into adpressed, eoncentric, broad, dark, fibrillosely dissolved
se ales on a pale ground, sometimes less squamose and instead con­
spicuously radially dark fibrillose. Margin lighter and with a rather
well developed velum zone. G i Il s free, very crowded, narrow, flesh
colour ("Light Vinaceous-Fawn") , at length dark blackish brown,
with sterile, whitish edge. S t e m stout and thiek, 6-1.2 cm X 25­
50 mm, eylindrical with attenuated base, solid, white, brownish below,
turning darker everywhere with age, smooth above ring, fibril­
loso-striate below ring, and with thick, whitish or brown seales
which often form an imperfect, oblique zone. These pieces of the
skin ean be rubbed off and derive from an often well-developed
universal veil which even in young fruit bodies may appear as a
eontinuous sheath round the lower part of the stem, as in P . edulis.
R i n g sheathed above, not right up to the top of the stem, white
and striate above, remarkably thick (1-2 mm), with fragile flesh,
narrowly adnate, often with thick, coarse, brown scales, sometimes
double-edged on the underside. F l e s h thick and firm, whitish,
slightly rubescent ("PaIe Vinaceous-Fawn") when broken. S m e Il
at first slightly acidulous, then after gathering disagreeable (faintly
reminiscent of licorice or chicory) . S c ha f f e r r e a c t i o n nega­
tive. Spore powder dark brown ("Mummy Brown" ; L. g8;
S. 701).