552 POUL LARSEN 
convex, then depressed in the centre, margin involute, naked, slimy, 
greyish violet (0 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, I0%8 I U. 
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. 
Lagarfljöt (both at Hallormstadir, Vallanes, Eyjélfsstadir and Egils- 
stadir), Jökülsä 4 Bru [P.L.). 
588. L. torminosus (Schaeffer) Fries, Epicr., p. 334. 
Agaricus torminosus Schaeffer, Fung. Ic., t. 12. 
Lagarfljöt, Myvatn [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, especially 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, 
697.927, 
Russula Fries. 
589. R. delica Fries sensu Bresadola, Fungi tridentini, t. 201. 
Lagarfljöt. — 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). — Flesh 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 u. 
Note. The fact that apparently there only occurs in Iceland the form 
with white or faintly yellowish gills would seem to indicate that Russula 
chloroides (Krombh.) Br. is a distinct species and should not be referred 
to Russula delica. 
590. R. graminicolor (Secretan) Quelet. 
Agaricus graminicolor Secretan, Mycographie Suisse I, No. 518. 
Here and there in the birch copse in the Lagarfljét Valley [P. L.]. 
Pileus 5—6 cm broad, plano-convex with depressed centre, margin 
