The Botany of Iceland - 01.12.1932, Qupperneq 108

556
POUL LARSEN
1 mm thick, white, smooth, clothed with projecting hairs below. — Gills
at first pale, then black, narrow, distant, free. — Spores dark purplish-
brown, flattened, heartshaped on a side view, c. 9 fx in diameter, viewed
from the edge ellipsoidal and 9X6 ju.
603. C. ephemeroides (Bulliard) Fries, Epicr., p. 250.
Hofsfjall [O. D.]. — On horsedung.
The present writer has not observed this species in Iceland, but it
is given by E. Rostrup in Isl. Svampe 1903, p. 296.
604. C. fimetarius (Linné) Fries, Epicr., p. 245.
Agaricus fimetarius Linné, Flora Suecica, No. 1213.
Akureyri [P. L.]. — On highly manured littoral íield.
Pileus at first clavate, then broadly conical with raised sulcate
margin, 2—5 cm high and broad, grey, brownish in centre, covered by
a floccose-squamulose layer. — Stipe elongate conical with a peronate-
floccose base, white, hollow, very fragile. — Gills at first grey, then
black, free, soon deliquescent as well as the whole cap. — Spores
blackish brown, ellipsoidal, 12—14.5X7—8 /,(.
605. C. atramentarius (Bulliard) Fries, Epicr., p. 243.
Agaricus atramentarius Bulliard, 1. c., t. 164.
Máfahlíð (Helgi Jónsson).
This species is listed among Iceland’s fungi by E. Rostrup, Isl.
Svampe 1903, p. 296.
Boletaceae.
Suillus Micheli.
606. S. castaneus (Bulliard) Karsten.
Boletus castaneus Bulliard, 1. c., t. 328.
Grjótnes [C. H. O.], det. E. Rostrup. — On a lieath.
Boletus Dillenius.
607. B. scaber Bulliard, I. c., t. 489, f. 1.
Common in birch copses throughout Iceland [P. L.].
608. B. laevis Fries, Epicr., p. 425.
Note. E. Fries states in the Epicrisis that he received this Boletus
from Count Raben, who had collected it in Iceland. The species has been
diagnosed on the basis of material preserved in alcohol. B. laevis has
never been found again either in Iceland or elsewhere, and since the
diagnosis of Fries renders it quite permissible to regard B. laevis as an
accidental smoothly stipitate variant of B. scaber, there seems to be no
reason to maintain B. laevis as a species.