FUNGI OF ICELAND 537 
ing parallelogram form, with few low warts, 9—13X5—6.5 u. — Cystidia 
— both at edge and on face of gills — broadly fusiform, coronate, 40— 
52 X 14—20 u. Differs from I. grammata Quélet in the more fuscous 
colour of the pileus. 
Cortinarius Fries. 
530. C. (Hydrocybe) tortuosus Fries, Syst. Myc. I, p. 235. 
Hallormstadir [P. L.). — In birch copses. 
Cap 2.5—4cm 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. — Gills 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—10.5* 5—6 u. 
531. C. (Hydrocybe) decipiens (Persoon) Fries, Epicr., p. 312. 
Agaricus decipiens Persoon, Synops. meth. fung., p. 298. 
Egilsstadir [P.L.]. — In birch copses. 
Pileus c. 2 cm broad, at first conico-campanulate, then expanded with 
a distinct umbo, hygrophanous, with thin flesh or skin-like margin sericeo- 
fibrous, chestnut brown (e 4), umbo darker (c 3). — Stipe eylindrical, occa- 
sionally dilated at base, rigid, 6 cm high, 2—3 mm thick, reddish brown 
internally, externally covered with white silky fibrils, which here 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 u. 
532. C. (Telamonia) incisus (Persoon) Fries, Syst. Mye. I, p. 213. 
Agaricus incisus Persoon, Synops. meth. fung., p. 310. 
Hallormstadir, Akureyri [P.L.]. — On knolls in swamps along Hörgä 
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 einnamon-coloured, broadly ellipsoidal, punctate, 9% 5.6 u. 
533. C. (Telamonia) helvelloides Fries, var. islandica n. var. 
Egilsstadir, Myvatn, Akureyri [P.L.). — In the littoral field along 
Glerä, in sandy meadows near Laxä and in meadows by Lagarfljöt. 
