Friesia IV, 3

- 162-
Psalliota arvensis (Schaeff.) Fr. subsp. exquisita (Vitt.) Møll,
et Schåff'., Ann. Myc. 36, p. 78, 1938.
non P. arvensis sensu Ricken, Kauffman, Baar, Hans Walty etc.
Icon.: F r i e s, Atl. och gift. Svamp., t.4, 1860.
L a n g e, F1. Ag. Dan. IV, t. 138 A, 1939.
J . S c h a f f e r: Michael, Flihrer f. Pilzfreunde, no. 55, 1939.
P i l e u s 7-15 cm, ovate-globate, then expanded, sometimes subumbonate
or somewhat flattened in the centre, silky, white, upon
pressure with dark lemon-colour ed ("Lemon Chrome") spots, during
gr owth turning alutaceous or paIe ochre ("Chamois", "Warm Buff"),
smooth or near the margin at first white floccose, often breaking
radially into scales in dry weather, with a fringe of velum along
the edge. G i Il s free, crowded, .narrow, long pale, then greyish
flesh-coloured ("PaIe Grayish Vinaceous"), at length blackish brown.
Edge sterile, light-coloured. S t e mslender, 8-13 cm X15-30 mm,
clavately swollen towards base and here 20-35 mm thick, hollow,
of the same colour as the cap, though often less yellow; silky, naked,
when young floccose towards the base. R i n g sheathed above, white,
becoming yellow, thin, broad, obliquely pendulous, placed high,
smooth above, on the underside with coarse, white or ochre yellow
scales whi?h often form a cog-wheel with somewhat blunt teeth.
F l e s h thin, white, with lage becoming gradually somewhat ochraceous
in the stem. S m e Il like almonds, S c h a f f e r r e a c t i o n
positive. S p o r e p o w d e r dark brown ("Mummy Brown"; L. g 8;
S. 701).
Spores ovate, 1-2-guttulate, 7-8(-9) X4.5(-5.5),u. Basid
i a 4-spored, clavate, 22-30 X7-9,u. S te r i g m a t a 3-4,u long.
M a r g i n a l c y s t i d i a numerous, ovate-balloon-shaped, oval or
sometimes shortly clavate, hyaline, 11-26 X9-18(- 21 ) ,u .
Gregarious in meadows, on dikes, now and then on old piled turf
or on decaying chaff and old hay, also in gardens on lawns and
on the outskirts of woods. Not common but occasionally occurring
in quantity in the same locality for several years running. June­
October.
Als: Danebod High School, on a lawn. - Falster: Systofte Skov.
- Lolland: Alholm; Albuen; Holmeskoven near Saxkjøbing; Nagelsti
Enge; Bjergestykkerne near Orebygård; Lilleø and Kejlsø in
Guldborgsund. - Germany: Meadow near Potsdam; here gathered
in company with J. Schaffer in quantity in 1937.