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 u., 
Omphalia (Persoon) Fries. 
486. O. hepatica (Batsch) Fries, Hym. Eur., p. 160. 
Agaricus hepaticus Batsch, Elenchus fungorum, f. 211. 
Akureyri [P. L.]. — On grass-covered, sandy meadows at Glerä. 
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 (j 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—3cm high, 2mm 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 u. Basidia clubshaped with 4 up to 10 u 
long sterigmata. 
487. O. onisca Fries. 
Agaricus oniscus Fries, Hym. Eur., p. 158. 
Isafjördur, Pingvellir and Laugarnes near Reykjavik [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, smooth, white, 
7.8X5 u. 
488. O. umbellifera (Linné) Fries, Hym. Eur., p. 160. 
Agaricus umbelliferus Linné, Flora Suecica, No. 1192. 
Akureyri [P.L.]; Hof in Hörgärdalur (O.D.]. — Occurs in great 
abundance among sedges, mosses, and Salix herbacea in the littoral 
field near Glerä. 
Cap 5—10 mm broad, margin incurved and sulcate, centre umbili- 
cate, straw-yellow (k 4). Stipe. cylindrical with slightly dilated base, 
2cm high, 1—2 mm thick, stuffed, white, somewhat mealy, base felted. 
Gills distant, decurrent, rather broad, white. Spores ellipsoidal, white, 
smooth, 6.5—8X3.5 u. 
Pleurotus Fries. 
489. P. applicatus (Batsch) Fries. 
Agaricus applicatus Batsch, Elench. fung., Cont. I, p. 171, f. 125. 
