FUNGI OF ICELAND 529 
Hebeloma Fries. 
506. H. crustuliniforme (Bulliard) Fries, Epicr., p. 180. 
Hallormstadir, Hälsskögur and at Borg [P.L... — Common in the 
birch copses. 
Cap 5—7 cm broad, plano-convex, with incurved margin, destitute 
of veil, pale brown to alutaceous; flesh thick, pale, smelling like radishes. 
Stipe cylindrical, but often with a somewhat bulbous base, white, floc- 
culose-squamulose, mealy at the apex. Gills rounded towards the stem, at 
first pale, then clay-coloured, edge of gills irregularly toothed, in damp 
weather exuding small drops. Spores elliptic, rough, brown, 10—12X 
6—7 u. The cystidia at the edge of the gills hairshaped, or somewhat 
swollen at apex, sinuate. 
507. H. fastibile Fries, Epicr., p. 178. 
Egilsstadir [P.L.]. — In birch copses. 
Cap 5—8 cm broad, convex, with rounded obtuse umbo, glutinous, 
margin inrolled, flocculose, at first almost while, then palely alutaceous 
at centre. — Stipe cylindrical. bulbous at base, white, covered with a 
fibrillose layer, at the apex a ringshaped veil. Gills comparatively narrow, 
thin, emarginate, at first almost white, then pale chocolate, edge of gills 
white and toothed. — Spores narrowly ellipsoidal, pale brown, with one 
large drop in the middle, 11—13X5—6 u. Cystidia at the edge of gills 
hair-shaped sinuate with swollen apex. 
508. H. sp. (H. hiemale Bresadola, Icon. Myc. XV, Milano1930, Tab. 715%). 
Hallormstadir [P. L.]. — In birch copses. 
Cap 2—4cm broad, plano-convex, slimy, centre brown (h 2), margin 
at first grey — covered by the veil — then fuscous (h 3). Stipe cylindrical 
or somewhat dilated at base, 7cm long, 2—4 mm thick, rigid, brittle, 
hollow, at first white, then brown, longitudinally adpresso-fibrillose, apex 
mealy, as a rule a distinct ring. — Gills at first pale grey, then brown 
with dark dots, deeply emarginate, edge of gills minutely frayed. Spores 
ellipsoidal, smooth, pale, 10—12*5—6 u. Edge of gills closely set with 
cystidia which are hair-shaped, but often swollen at the base or in the 
middle, 60X6—7 u. 
509. H. mesophaeum Fries, Epier., p. 179. 
Common on heaths and in birch copses in the areas examined. 
Cap 4—5 cm broad, at first convex, but soon plane or even de- 
pressed, slimy, centre dark brown (h 2), margin clay-coloured (e 3), but 
long covered by a greyish white veil. Stipe cylindrical, often somewhat 
flexuose, hollow, rusty brown inside, covered on the outside with the 
remains of the greyish yellow veil and often bearing a lacerated ring. 
Gills at first fuscous, then clay-coloured (e 3), crowded, emarginate. 
Spores ellipsoidal, straight or faintly curved, brown, rough, 10*5—6 u. 
Cystidia at edge of gills hairshaped, but more or less swollen at apex, 
55—65 %4—8 u. 
The Botany of Iceland, Vol, Il. Part HI 35 
