The Botany of Iceland - 01.12.1941, Page 15

STUDIES IN THE LARGER FUNGI OF ICELAND
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Helvellaceae.
Helvella Linné.
4. *H. lacunosa Afzel., Vet. Ac. Hd., 1783, p. 303.
Laugarvatn, 5.VIII.1935. Among grass in a meadow.
Spores oval, 1-guttulate, 17 X 11 M ', plate, fig. 4.
Tremellaceae.
Tremella Dill.
5. *T. mesenterica Retz.
Slúttnes, 31.VII. 1935. On bark of Betula.
Polyporaceae.
Polyporus Micheli.
6. P. brumalis (Persoon) Fries.
Boletus brumalis Persoon, Synops. meth. fung., p. 517.
Vaglaskógur, 31.VII.1935. On fallen branches of birch.
7. *P. varius Fries, Syst. Myc. I, p. 352.
Reykjahlíð, 27.VII. 1937. In a lavafield (determined by N. F. Buchwald).
Cap 5—12 cm, pallid ochraceous, then tan colour, or cinnamon streaked with
brown, very coriaceous, cyathiform, or plane and depressed at the disc or beyond,
smooth. Stipe 1.5—5 cm X 4—12 mm, pale ochraceous at the apex, black lower
down, central, excentric, or lateral, smooth, tough, firm. Tubes whitish, then
ochraceous or cinnamon, decurrent, 1—3 mm long; orifice of pores white, becoming
yellowish, small, round. Flesh white, then yellowish, very tough, woody, thin. Smell
slight. Taste bitter. On stumps.
Spores white, oblong or elliptical, 7 X 2.5—3 M ', plate, fig. 5.
Hygrophoraceae.
Hygrophorus Fries.
8. H. conicus (Scopoli) Fries, Hym. Eur., p. 419. Poul Larsen, Fungi of Ice-
land, p. 522, no. 478. J. E. Lange, Fl. Agar. Dan., vol. V, t. 167, f. D.
Laugarvatn, 5.VIII.1935. Vestmannaeyjar, 9.VIII.1935. Among grass in out-
fields and under birches.
9. *H. constans J. E. Lange (?), Studies in the Agarics of Denmark V, p. 24
(H. obrussea Ricken). Fl. Agar. Dan., vol. V, t. 167, f. C.
Laugarvatn, 5.VIII.1935. In birch copses. Vestmannaeyjar, 9.VIII.1935. Among
grass in outfields.
Cap 3—4 cm broad, broadly conical, yellow, pellucid-striate. (It is generally
more broadly conical than H. conica, but chiefly distinguished from this species by
never turning black). Flesh paler yellow. Taste mild. Stipe 4—6 cm high, 4—6 mm