548 POUL LARSEN 
M\vatn, Glerä near Akureyri [P.L.]. — On horse-dung in meadows 
near Glerä and Myvatn. 
Pileus c. 3 cm broad, at first hemispherical, then expanded, fleshy, 
not hygrophanous, greyish-red (d 8), pitted, at length with cracked cuticle. 
— Stipe concolorous, darker below, farinaceous above. — Gills broad, 
adnate, black with white spots, margin white-fringed. — Spores black, 
almond-shaped, 16—17 X 11 u. — Cystidia at the edge of gills at apex 
clavate, swollen, up to 7.5 u broad. 
The cystidia differ decidedly from those of P. campanulatus. 
570. P. campanulatus (Linné) Fries, Hym. Eur., p. 311. 
Agaricus panulatus Linné, Flora Suecica 2, No. 1213. 
Reykjavik (Feddersen and C.H.O.), det. E. Rostrup. 
571. P. fimicola Fries, Syst. Myc. I, p. 301. 
Reykjahlid, Skütustadir, Laxädalur, Reykjadalur, Ljösavatn and Ellida- 
vatn [P. L.]. — In homefields. 
Pileus 1—4 cm broad, at first campanulate, then expanded, hygro- 
phanous, veil none, dark olive-brown (c 3) when moist, light reddish- 
brown when dry (between g2 and d7), but long retaining a dark 
marginal zone. — Stipe 4—7 cm long, 2—3 mm thick, fragile, hollow, 
brown below, pale and farinaceous above. — Gills crowded, ventricose, 
adnate, variegated, with white margin, at length black. — Spores ellip- 
soidal or somewhat almond-shaped, dark brown, smooth, 12—13X7—7.5 u. 
— Cystidia at edge of gills cylindrical, somewhat dilated at base. 
Psilocybe Fries. 
572. P. ericaea (Persoon) Fries. 
Agaricus ericaeus Persoon, Synops. meth. fung., p. 413. 
Found at Reykholt by Robert and recorded in E. Rostrup’s Isl. 
Svampe 1903, p. 296. 
573. P. atrorufa (Schaeffer) Fries, Syst. Myc. I, p. 293. 
Agaricus atrorufus Schaeffer, Fung. Ic., t. 234. 
Pingvellir and Myvatn [P.L.]. — Among grass in damp homefields. 
Pileus 1—1.5 cm broad, convex, hygrophanous, not slimy, margin 
striate; dark reddish-brown (j 5), when moist, pallid when dry (g 4). — 
Stipe 3—4 cm long, 1—2 mm thick, pale and mealy above, dark brown 
below, adpresso-fibrillose, cartilaginous, hollow. — Gills brown, broadly 
adnate and slightly decurrent, crowded. — Spores ellipsoidal, brown, 
8X45 u. — Cystidia at the edge of gills spindle-shaped, acute. 
574. P. physaloides (Bulliard) Fries, Hym. Eur., p. 300. 
Agaricus physaloides Bulliard, Hist. champ., t. 366, f. 1. 
Seydisfjordur [P. L.]. — Outfields and bogs. 
