The Botany of Iceland - 01.12.1932, Page 82

530
POUL LARSEN
Inocybe Fries.
510. I. descissa Fries, Epicr., p. 174.
Hallormstaðir [P. L.]. — Among the grass in outfields.
Pileus 2—3cm broad, convex, umbonate, cuticle radiately cracked and
split and recurved at margin, the umbo cracked so as to assume a warty
appearance, colour light brown (k 4). Stipe cylindrical
or slightly dilated at base, pale, mealy at top, the remaining
part íinely striate-sulcate. Gills almost coloured like the
pileus but somewhat lighter, not emarginate, butnarrowly
adnate. — Spores smooth, brown, oblique, slightly acu-
minate at one end, 1- or 2-guttulate, 9—11 X 5—b.5ju.
Cystidia both on the surface and at the edge of gills
flaskshaped, apex coroniferous, c. 50X18 fx.
511. I. geophylla (Sowerby) Fries, Syst. Myc. I, p.
258. Sowerby, t. 124.
Hallormstaðir and Egilsstaðir [P. L.].
Cap c. 2 cm broad, convex and umbonate or coni-
white, radiately fibrillose. Stipe cylindrical, but as a rule
with a small bulb. at base. — Gills at first greyish white,
then greyish clay-coloured, strongly rounded towards
the stipe and adnate. Spores brown, smooth, ovoid
or ellipsoidal, 1- or 2-guttulate, 8.5—9.5X5 fx. — Cystidia
both on the surface and at the edge of gills sub-
cylindrical or somewhat ventricose below with short
stalk, apex coronate, 55—60X12 ^.
512. I. hirtella Bresadola, Fungi tridentini I, p. 52.
Glerá near Akureyri [P. L.]. — Littoral fields.
Cap 1.5—2.5 cm broad, conical, at first pale yellow,
then tawny or brown (g 2 to g 6), apex smooth, rest
of cap at first minutely squamulose and lacerate, then
longitudinally disunited in fibrils. Stipe cylindrical,
bulbous, white or faintly yellow, minutely pubescent
flocculose, stuffed. — Gills at flrst almost white, then Inocybe geophylla.
coloured Iike the cap, with white frayed edges, nar- Cystidia and
rowly adnate. — Spores ovoid or ellipsoidal, finely spores X 500.
punctate, brown, 8.8—9.5X5—6 /x, 1- or 2-guttulate.
Cystidia at edge of gills and on the surface short and broadly flask-
shaped, apex coronate, 40X15—20 /x, in addition short clubshaped cells
at the edge of the gills.
513. I. lacera Fries, Syst. Myc. I, p. 257.
Egilsstaðir, Hallormstaðir, Mvvatn, Laxárdalur, Reykjadalur, Ljósa-
vatnsskarð and Glerá (Akureyri) [P. L.]. — Among the grass in littoral
fields, in sandy river valleys and outflelds.
Fig. 4.
Inocybe descissa.
Cystidia and
spores X 500.
cal, surface dry,