The Botany of Iceland - 01.12.1932, Page 76

524
POUL LARSEN
Cap 3—5 cm broad, elongated, frequently with somewhat irregular
sinuous margin, flesh thin, white to watergrey, silky when dry. Stipe
cylindrical, stuffed, 3—4 cm high and 3—5 mm thick, white or greyish,
felted at top. Gills crowded, white, broadly adnate, only slightly decur-
rent. The flesh smells and tastes of flour. Spores smooth, white, ellip-
soidal, 5X3/1.
Omphalia (Persoon) Fries.
486. 0. hepatica (Batsch) Fries, Hym. Eur., p. 160.
Agaricus hepaticus Batsch, Elenchus fungorum, f. 211.
Akureyri [P. L.]. — On grass-covered, sandy meadows at Glerá.
Cap 1.5—2.5 cm broad with incurved margin, plano-convex, even,
without or with a very slight depression in the centre, hygrophanous,
reddish brown (i 4), in the old fungus the cap becomes crateriform with
a pendent, undulate and somewhat sulcate margin, and turns aluta-
ceous in colour (j 1), first in the centre and then at the margin. Stipe
cylindrical, hollow, 1.5—3 cm high, 2 inm thick, pale reddish brown
(j 2), naked, the base covered with white hyphæ. Gills distant, rather
narrow, at length strongly decurrent, coloured like the stem. Spores
ovoid, smooth, white, 7X4—5 fi. Basidia clubshaped with 4 up to 10 p.
long sterigmata.
487. 0. onisca Fries.
Agaricus oniscus Fries, Hym. Eur., p. 158.
Isafjörður, Þingvellir and Laugarnes near Reykjavík [P. L.]. — On
peaty and swampy ground among mosses and sedges.
Cap c. 2 cm broad, deeply umbilicate, campanulate, pendulous, mar-
gin sulcate-undulate, at length lobate, hygrophanous dark brown (f 4),
horn grey when dry. Stipe short, base somewhat tapering, stuffed, at
length hollow, greyish brown, mealy, felted at base. Gills grey, rather
crowded, decurrent. Spores piriform with oblique apex, smootb, white,
7.8X5 /í.
488. 0. umbellifera (Linné) Fries, Hym. Eur., p. 160.
Agaricus umbelliferus Linné, Flora Succica, No. 1192.
Akureyri [P. L.); Hof in Hörgárdalur [O. D.]. — Occurs in great
abundanee among sedges, mosses, and Salix herbacea in the littoral
fleld near Glerá.
Cap 5—10 mm broad, margin incurved and sulcate, centre umbili-
cate, straw-yellow (k 4). Stipe cylindrical with slightly dilated base,
2 cm high, 1—2 mm thiek, stufTed, white, somewhat mealy, base felted.
Gills distant, decurrent, rather broad, white. Spores ellipsoidal, white,
smooth, 6.5—8X3.5 p.
Pleurotus Fries.
489. P. applicatus (Batsch) Fries.
Agaricus applieatus Batsch, Elench. fung., Cont. I, p. 171, f. 125.