The Botany of Iceland - 01.12.1932, Qupperneq 89

FUNGI OF ICELAND
537
ing parallelogram form, with few low warts, 9—13X5—6.5 /x. — Cystidia
— both at edge and on face of gills — broadly fnsiform, coronate, 40—
52 X 14—20 /t. Dilfers from I. grammata Quélet in the more fuscous
colour of the pileus.
Cortinarius Fries.
530. C. (Hydrocybe) tortuosus Fries, Syst. Myc. I, p. 235.
Hallormstaðir [P. L.]. — In birch copses.
Cap 2.5—4 crn broad, convex, umbonate, hygrophanous, when fresh
dark chestnut-colour (c 3), when dry a lighter brown; margin covered with
a silky white coating; flesh thin. — Stipe cylindrical, hollow, flexuose
and twisted, brittle, lilac violet at apex, covered with a silky white coating,
brown inside. — Gifls ascending, emarginate adnate, often with a decur-
rent tooth, brown with a paler edge, assuming a red tinge when broken.
Spores brown, ellipsoidal, punctate, 8—10.5X5—6 /í.
531. C. (Hydrocybe) decipiens (Persoon) Fries, Epicr., p. 312.
Agaricus decipiens Persoon, Synops. meth. fung., p. 298.
Egilsstaðir [P. L.]. — In birch copses.
Pileus c. 2 cm broad, at first conico-campanulate, then expanded with
a distinct umbo, liygrophanous, with thin ílesh or skin-like margin sericeo-
fibrous, chestnut brown (e 4), umbo darker (c 3). — Stipe cylindrical, occa-
sionally dilated at liase, rigid, 6 cm high, 2—3 mm thick, reddish brown
internally, externally covered with white silkj7 fibrils, which liere and there
— especially at the base of stipe — are tinged with rose colour. — Gills
thin, crowded, emarginate adnate, with a decurrent tooth, at first pale
reddish yellow, then cinnamon. — Spores tawny, ellipsoidal with obtuse
ends, sharply and finely punctate, 7.5—9 X 4.5—5 /t.
532. C. (Telamonia) incisus (Persoon) Fries, Syst. Myc. I, p. 213.
Agaricus incisus Persoon, Synops. meth. fung., p. 310.
Hallormstaðir, Akureyri [P. L.]. — On knolls in swamps along Hörgá
and in birch copses.
Pileus 2—4 cm broad, convex, acutely umbonate, hygrophanous, dark
brown at centre (f 4), paler along the margin (c 3), cuticle at first even
and clothed with crisped grey hair-like scales, then radiately cracked
and broken up into fibrils. — Stipe 3—4 cm high, 3—4 mm thick, cylin-
drical or dilated at base, coloured like margin of cap, rust-coloured inter-
nally, externally covered by a volva ending on a level with margin of cap
in a distinct and lacerated ring. — Gills dark cinnamon, emarginate 3—4 mm
broad. — Spores cinnamon-coloured, broadiy ellipsoidal, punctate, 9X5.6 fx.
533. C. (Telamonia) helvelloides Fries, var. islandica n. var.
Egilsstaðir, Mývatn, Akureyri [P. L.]. — In the littoral field along
Glerá, in sandy meadows near Laxá and in meadows by Lagarftjót.