The Botany of Iceland - 01.12.1932, Side 94

542
POUL LARSEN
Pholiota Fries.
549. Ph. togularis (Bulliard) Fries, sensu Ricken.
Agaricus togularis Bulliard, Hist. champ. t. 595, f. 2.
Hallormstaðir [P. L.]. — Among grass in open parts of birch copses.
Pileus campanulate, 2 cm 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 flbrous
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 ju. — Edge of gills beset with flask-
shaped cystidia, acdminate above.
550. Ph. praecox (Persoon) Fries, Hym. Eur., p. 217.
Agaricus praecox Persoon, Synops. meth. fung., p. 420.
Hálsskógur in Fnjóskadalur [P. L.]. — In birch copses.
Pileus convex, obtuse, 4—5 cm broad, at flrst white, t'nen yellowish-
white or cream-coloured, even, at length minutely fringed along the
margin. — Stipe cylindrical, 5 cm long, 5 mm thick, white with a raised
skin-like ring. — Gills at flrst 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 fx. —
Edge of gills beset with scattered, shortly and broadly flask-shaped
cystidia, 40—45 X 18—20 /x.
551. Ph. mutabilis (Schaeffer) Fries, Syst. Myc. I, p. 245.
Agaricus mutabilis Schaeffer, t. 9.
Hallormstaðir. 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, töugh, adnato-
decurrent. Flesh thin, pale brown, taste mild, odour none. — Spores
ovoid, brown, smooth, 6—7 X 4—4.5 (x. — At edge of gills hair-shaped,
4 fx broad cystidia.
552. Ph. marginata (Batsch) Fries(?), Hym. Eur., p. 225.
Meadows near Vallanes (Lagarfljót), a bog at Ljósavatn, the shore
at Akureyri and Laugarnes near Reykjavík [P. L.]. — On peaty, damp
soil in bogs and river valleys, but not in birch copses.
Pileus 2—5 cm broad, at flrst campanulate, with a thin incurved
margin, then plano-convex, sometimes with a small umbo, hygrophanous,