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 fibres 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—10.5 X 6—6.5 u, a few up to 12X 6.5 uw. — 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 Fries. 
553. F. alnicola Fries, Syst. Myc. I, p. 250. 
Hallormstadir [P. L.]. — Grows in clusters at the foot of birch trunks. 
Pileus c. 4 cm broad, convex with an involute margin, moist, viscid, 
yellow (14), at first covered by a thin, white, mealy layer, then naked, 
margin joined to the stipe by 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 u. 
— 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 Seydisfjöröur and on the edges of ditches 
in a bog at Laugarnes near Reykjavik [P. L.]. 
Pileus 3—6 cm broad, at first conico-campanulate, then expanded, 
more 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 1, 
breadth above: 6—7 u. below: c. 10 u. 
555. N. sobria Fries (?), Hym. Eur., p. 263. 
On naked ground in deep cracks at Glerä (Akureyri) and on the sides 
of turf-pits at Seydisfjordur [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, fibrous, or 
sprinkled with bran on the surface. — Stipe cylindrical, base somewhat 
