The Botany of Iceland - 01.12.1932, Qupperneq 101

FUNGI OF ICELAND
549
Pileus 1—2 cm broad, campanulate, umbonate, depressed about the
umbo, with thin ílesh, reddish-brown (h 2); margin pellucidly striate. —
Stipe short (3 cm long, 1—2 mm thick), hollow, flexuose, concolorous
below, paler and mealy above, with a thin coating of adpressed hairs.
— Gills at first pale, then concolorous, broadly adnate. — Spores ellip-
soidal, smooth, hrown, 8—10X5—5.5 ji. — Cystidia at the edge of gills
cylindric.
575. P. bullacea (Bulliard) Fries, Syst. Myc. I, p. 297.
Agaricus bullaceus Bulliard, Hist. champ, t. 566, f. 3.
Hallormstaðir [P. L.]. — Among' moss in bogs.
Pileus up to 2 cm broad, hemispherical, hygrophanous, striate, dark
with brownish or reddish tinge (c 2)', when dry k 2 to k 3, with well-
developed veil at margin. — Stipe cylindrical, 3 cm high, 2 mm thick,
hollow, brown, covered with wliite scurf sometimes forming a distinct ring.
— Gills broad, broadly adnate, purple-brown, edge white, dentate. —
Spores ovoid with truncate apex, purple-brown, 7X4.5—5 /,t. — Cystidia
at the edge of gills ílexuose, hairshaped with swollen base.
576. P. merdaria (Fries) Bicken.
Stropharia merdaria Fries, Hym. Eur., p. 286.
fsafjörður and Tjörnin (Reykjavík) [P. L.]. — In liomefields.
Pileus 1.5—2 cm broad, at lirst hemispherical, then plano-convex,
olive-brown (h 4 to h 8), epidermal layer viscid, margin striate, distinct
marginal veil in young specimens. — Stipe 2—4 cm high, 2—3 mm thick,
more or less swollen at base, hollow, concolorous, but with a frayed,
greyish-white coating, mealy above. — Gills broad, broadly adnate, at
flrst grey then purple brown with a white fringed edge. — Spores smooth,
ellipsoidal with a germ pore, purple violet at length brown, 12—14
X8—9 ji. — Cystidia at edge of gills conical or flexuose spindle sliaped,
strongly acuminate.
577. P. elongata (Persoon) Fries.
Agaricus elongatus Persoon, Icones et descriptiones fungorum, t. 1, f. 4.
Vallanes in Lagarfljót, Grund near Akureyri [P. LJ. — Among Sphag-
num in bogs.
Pileus 1—2 cm broad, plano-convex, + umbonate, pale yellowish-
white becoming olive yellow (o 5), centre as a rule pale reddish-brown
(h 3), somcwhat hygrophanous and with pellucidly striate margin. — Flesh
pale, taste bitter. — Stipe cylindrical, flexuose, tough, 6—8 cm high,
1—2 mm thick, pale yellow above, the remains of the veil forming an
imperfect ring, reddish brown externally and internally below, sliining
when dry. — Gills at íirst nearly white, then purple-grey. broadly adnate
or slightly emarginate, edge of gills denticulate under the lens. — Spores
ovoid, pale purple, 9—12X5.5—6.5 fj, (some few spores up to 14X7.5 fx).
— Cystidia al the edge of gills (really the ends of hyphae from the
trama) spindleshaped with slightly swollen apex, 35X6—8/1, colourless