The Botany of Iceland - 01.12.1932, Side 104

552
POUL LARSEN
convex, then depressed in the centre, margin involute, naked, slimy,
greyish violet (o 3—o 4). — Flesh white, but turning violet when wounded
(n 4—o 6). — Stipe slimy, pitted, greyish yellow (k 2), turns violet when
wounded. — Gills white to yellowish (k 1), becoming violet on contact,
broadly adnate or somewhat decurrent, crowded. — Spores pale, verru-
cose, 10X8—9 fx.
587. L. uvidus Fries var. farinipes n. var.
This variety agrees in all essentials with the main species, but
differs from it in the stipe never being slimy, but always covered with
a grey or greyish red mealy coating.
It is far more frequent in Iceland than the main species and occurs
in meadows, bogs, and on knolls in moist spots of the mountain pastures.
Lagarlljót (both at Hallormstaðir, Vallanes, Eyjólfsstaðir and Egils-
staðir), Jökúlsá á Bru [P. L.].
588. L. torminosus (Schaeffer) Fries, Epicr., p. 334.
Agaricus torminosus Schaeffer, Fung. Ic., 1.12.
Lagarfljót, Mývatn [P. L.]. — Common in copses of Betula pubescens
and Betula nana.
Milk white, acrid. — Pileus 6—8 cm broad, convex, then strongly
depressed, viscid, tomentose-squarrose, cspecially along the incurved
bearded margin, pale incarnate (e 5), with more brightly coloured (c 8)
zones. — Stipe cylindrical, hollow, pale incarnate (e 5). — Gills pale
yellow (b 7), crowded, decurrent. — Spores white, subspherical, echinate,
8-9X9 fi.
Russula Fries.
589. R. delica Fries sensu Bresadola, Fungi tridentini, t. 201.
Lagarfljót. — Fairly common in birch copses.
Pileus 6—10 cm broad, convex with depressed centre, at length
infundibuliform, margin incurved, not sulcate. Pellicle of pileus but
slightly developed, at length split into small patches, colour white with
a brownish tinge (g 5). — F’lesh white, slightly bitter. — Stipe short,
becoming thinner, slightly tomentose, concolorous. — Gills white to
creamcolour (never shaded with green), crowded, narrow, forked at margin
of cap. — Spores white, subspherical, echinulate, 8—10X8 fi.
Note. The fact that apparently tliere only occurs in Iceland the form
with white or faintly yellowish gills would seem to indicate that Russiila
chloroid.es (Krombh.) Br. is a distinct species and should not be referred
to Russula delica.
590. R. graminicolor (Secretan) Quélet.
Agaricus graminicolor Secretan, Mycographie Suisse I, No. 518.
Here and there in the birch copse in the Lagaríljót Valley [P. L.].
Pileus 5—6 cm broad, plano-convex with depressed centre, margin