The Botany of Iceland - 01.12.1932, Qupperneq 95

FUNGI OF ICELAND
543
margin pellucidly striate, shining, orange-brown when moist (between f 8
and b 5), paler when dry (b 6). — Stipe cylindrical, hollow, pale brown,
covered with adpressed greyish-white libres below, bearing above a skin-like
pale rusty yellow ring adpressed to the stipe. — Gills narrow, crowded,
broadly adnate or somewhat emarginate, yellowish brown, edge dentate.
— Spores brown, slightly punctate, broadly ellipsoidal, the greater part
10—10.5X6—6.5 fx, a few up to 12X6.5 /x. — Cystidia at edge of gills
cylindrical to flask-shaped.
In reality the fungus only differs from Ph. marginata in the dimen-
sions of the spores.
Flammula I'ries.
553. F. alnicola Fries, Syst. Myc. I, p. 250.
Hallormstaðir [P. L.]. — Grows in clusters at the foot of birch trunks.
Pileus c. 4 cm broad, convex with an involute margin, moist, viscid,
yellow (1 4), at first covered by a thin, white, mealy laj^er, then naked,
margin joined to the stipe bjr a rather thick, white veil, which subse-
quently splits and hangs down from the margin. Flesh pale yellow. —
Stipe cylindrical, concolorous above, covered below with rusty brown fibres
or scales. — Gills concolorous, emarginate-adnate, tough, edge white
and dentate-floccose. — Spores ellipsoidal, smooth, brown 8—9 X 4.5
— Edge of gills beset with sterile hyphae swollen at the apex.
Naucoria Fries.
554. N. myosotis Fries, Hym. Eur., p. 261.
On the edges of turf-pits at Seyðisfjörður and on the edges of ditches
in a bog at Laugarnes near Reykjavík [P. L.].
Pileus 3—6 cm broad, at first conico-campanulate, then expanded,
rnore or less conspicuously umbonate, margin in young specimens joined
to the stipe by a well-developed, yellowish-white veil; disc olive-brown
(f 6), margin paler. — Stipe cylindrical, 7—12 cm long, 4—8 mm thick,
frequently attenuated into a rootshaped base, fistulose, tough, yellowish-
white above (b 8) with a ring in young specimens, more brownish below,
everywhere fibrous and viscid. — Gills broadly adnate, at first yellowish-
white (b 8), then dark-brown, margin serrate. — Spores brown, smooth,
ellipsoidal or somewhat oblique, 15—17 X 7.5—8.5 /u. — Edge of gills
closely beset with cylindrical cells swollen at the base, length: c. 50 fi,
breadth above: 6—7 fi. below: c. 10 fx.
555. N. sobria Fries (?), Hym. Eur., p. 263.
On naked ground in deep cracks at Glerá (Akureyri) and on the sides
of turf-pits at Seyðisfjörður [P. L.].
Pileus 1—2.5 cm broad, campanulate with incurved margin, then
almost plane with slightly raised centre, not hygrophanous, pale brown
or alutaceous (k 2), reddish-brown in the centre (h 2), silky, flbrous, or
sprinkled with bran on the surface. — Stipe cylindrical, base somewhat