The Botany of Iceland - 01.12.1932, Page 84

532
POUL LARSEN
Cap 3—5 cm broad, at first campanulate with incurved margin, then
almost plane, yellowish brown (e 3), covered with a thin white layer,
subsequently splitting, at centre the cracks penetrate into the white flesh,
making this area grey and verrucose. Stipe short (2—3 cm X 4—6 mm),
somewhat marginato-bulbose, stuffed, at first white,
then coloured like the cap, mealy above, the rest
adpresso-fibrous. — Gills emarginate or nearly free,
at first pale, then pale olive-brown with paler edge.
— Spores brown, smooth, from ovoid to reniform,
1- or 2-guttulate, 9—11.5X5—(5.5 ju. — Cystidia both
at the edge and surface of the gills, fusiform, apex
coronate, 44—50X16—24 /i.
Note. I. muculata Boudier differs from I.brunnea
Quélet: 1) The surface of the cap is paler and sub-
squamulose, 2) it has genuine cystidia, 3) broader
spores.
516. I. rimosa (Bulliard) Fries sensu Bataille.
Fries Hym. Eur., p. 232. — Bulliard Champ., t. 388.
Akureyri. — Grows amongst grass, moss and Salix herbacea in littoral
pastures.
Pileus 3—4 cm broad, convex, obtusely gibbous, entirely clothed with
silky íibres, at length cracked at the margin which projects beyond the
edge of gills and in young pilei is connected with the stipe by a fibril-
lose veil. The colour is brown (h 2 to h 3), the ílesh white. Stipe c.
3 cm long, 4—5 mm thick, thinner at apex and somewhat dilated at
base, stuífed, pale reddish brown, in young pilei with a fugacious ring
on a level with the margin of cap. — Gills broadest at the margin of
cap, deeply emarginate, at first creamcoloured (e 5), tlien brown (h 3),
edge of gills white and toothed. — Spores brown, smooth, ellipsoidal or
ovoid, 11.5—13.5X6.5—7.5 fi. — Cystidia botli at the edge and on the
surface of tlie gills and on tlie upper part of the stipe, cylindrical or
elongate llaskshaped, apex coronate, 65—75X13—19 /i.
517. I. umbonata Quélet, sensu Bicken, Die Blátterpilze, p. 106.
Seydisfjörður [P. L.]. — Among mosses in a bog.
Pileus 2—3 cm broad, plano-convex, with conspicuous as a rule acute
umbo, radiatcly sericeo-fibrillose, light brown (h 4), slimy. Stipe 3 cm
long, 2—3 mm thick, cylindrical, ])ierced by a slender canal, coloured
like the cap but paler, mealy at apex, otherwise naked, smooth. —
Spores brown, smooth, ellipsoidal, 8—10X5 /i. — Cystidia both at edge
and on face of gills fusiform, apex coronate, 30—35X12—15 /i.
518. I. sp.
Hallormstaðir [P. L.]. — Among mosses and grass in a bog.
Pileus 4—5 cm broad, plano-convex, fioccosely fibrillose, not crisped-
felted and not radiately cracked, tawny but with a íibrous white coating
densest in the centre. — Stipe 4 cm long, 8—10 mm thick, stuffed or later
Cystidia and spores
X 500.