542 POUL LARSEN 
Pholiota Fries. 
549. Ph. togularis (Bulliard) Fries, sensu Ricken. 
Agaricus togularis Bulliard, Hist. champ. t. 595, f. 2. 
Hallormstadir [P. L.]). — Among grass in open parts of birch copses. 
Pileus campanulate, 2cm broad, 1.5 mm long, hygrophanous, flesh 
thin, pellucidly striate, ochraceous (k 3), brown in the centre (k 6), lighter 
when dry and slightly rugose. — Stipe cylindrical, 7 cm long, 1-2 mm 
thick, slightly bulbous, hollow, pale and mealy above, rusty and fibrous 
below. — Gills ascending, crowded, tawny, margin white and dentate. — 
The veil forms a membranaceous white ring, radiately striate-plicate on 
the upper side, movable, central. — Spores elongate-ovoid, brown. smooth, 
germ pore distinct, 12—13 X 6 u. — Edge of gills beset with flask- 
shaped cystidia, acuminate above. 
550. Ph. praecox (Persoon) Fries, Hym. Eur., p. 217. 
Agaricus praecox Persoon, Synops. meth. fung., p. 420. 
Hälsskögur in Fnjöskadalur [P.L.). — In birch copses. 
Pileus convex, obtuse, 4—5 cm broad, at first white, then yellowish- 
white or cream-coloured, even, at length minutely fringed along the 
margin. — Stipe cylindrical, 5cm long, 5 mm thick, white with a raised 
skin-like ring. — Gills at first almost white, then rusty brown, emargi- 
nate-adnate, with a decurrent tooth. Flesh soft, white, smelling and 
tasting like flour. — Spores ovoid, brown, smooth, 8—9.5X5—6 u. — 
Edge of gills beset with scattered, shortly and broadly flask-shaped 
cystidia, 40—45 X 18—20 u. 
551. Ph. mutabilis (Schaeffer) Fries, Syst. Myc. I, p. 245. 
Agaricus mutabilis Schaeffer, t. 9. 
Hallormstadir. Rare [P. L.]. — Grows in clusters on stumps in birch 
copses. 
Pileus 5—6 cm broad, plano-convex, obtusely gibbous, hygrophanous, 
brown (h 3), paler when dry, especially at the margin, (b 7). — Stipe 
cylindrical somewhat flexuose, at length hollow, bearing a skin-like, per- 
sistent ring, below which it is rusty brown and squamulose, above the 
ring naked, pale brown and sulcate. — Gills crowded, thin, tough, adnato- 
decurrent. Flesh thin, pale brown, taste mild, odour none. — Spores 
ovoid, brown, smooth, 6—7 X 4—4.5 u. — At edge of gills hair-shaped, 
4 u broad cystidia. 
552. Ph. marginata (Batsch) Fries(?), Hym. Eur., p. 225. 
Meadows near Vallanes (Lagarflj6t), a bog at Ljösavatn, the shore 
at Akureyri and Laugarnes near Reykjavik [P. L]. — On peaty, damp 
soil in bogs and river valleys, but not in birch copses. 
Pileus 2—5 cm broad, at first campanulate, with a thin incurved 
margin, then plano-convex, sometimes with a small umbo, hygrophanous, 
