The Botany of Iceland - 01.12.1941, Page 35

STUDIES IN THE LARGER FUNGI OF ICELAND
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Laugarvatn, 5.VIII.1935. In birch copses.
Cap 8—15 cm broad, dingy yellow, often becoming pale, thinly fleshy, globose,
then expanded and depressed, rigid, viscid in wet weather: margin broadly mem-
branaceous, at first incurved, at length tuberculate-striate. Stipe 5—9 X 1—3 cm,
whitish, ventricose. Gills whitish, or straw colour, often dingy when bruised, at first
exuding watery drops, adnexed, crowded, connected by veins often forked. Flesh
white, then ochraceous. Smell very strong. Taste acrid.
Sporepowder white. Spores subspherical, c. 8 X 7 fl, echinulate-verrucose.
Fig. 1 j.
124. *R. sardonia Fr., Epicr., p. 353. (= R. expallens Gill.). J. E. Lange,
Fl. Agar. Dan., vol. V, t. 180, f. D.
Laugarvatn, 5.VIII.1935. In birch copses. Varmahlið, 2.VIII.1935.
Sporepowder yellow (7 b—6 b). Spores oval-subspherical, echinulate-verrucose,
7.5 X 6.5 JU, 7.5 X 7.5 JU- Fig. 1 k and 11 (10—11 X 8—8.5 JU ; Varmahlið).
125. *R. versicolor J. Schaeffer, Russula Monographie, 1934, p. 369, t. II.
J. E. Lange, Fl. Agar. Dan., vol. V, t. 194, f. B.
Laugarvatn, 5.VIII.1935. Numerous in birch copses.
Cap 3—8 cm broad, thin-fleshed, convex then depressed-flat, edge becoming
minutely striate and somewhat grooved. Fundamental colour brownish incarnate
with a flush of purplish, in the centre yellowish-olive (h 7—i6) or at first darker
purplish to purple-brown (o 1—c 1—j 3—n 2), expallent, becoming olive-yellowish
or olive-greenish (h 7—i 6), edge flesh coloured or pale (c 7—c8—j 1—i 1). Cuticle
detachable. Stipe equal or somewhat dilated at base, spongy-brittle, white, discolour-
ing, from base up and in wound, to a rather vivid yellow (b 7—14—15). Flesh
tasteless; the gills slightly acrid. Gills rather crowded, rotundate in front, cream,
becoming pale yellow-ochry (b 7).
Sporepowder light ochry yellow (1 1—e5). Spores 7—7.5 X 5.5—6.5 H, broadly
oval, echinulate and somewhat reticulate. Fig. 1 m.
126. *R. gracillima J. Schaeffer, Russula Monographie, 1934, p. 482, t. III.
Laugarvatn, 5.VIII.1935. In a birch copse.
Cap 3—8 cm broad, thin-fleshed, convex then depressed-flat, somewhat umbonate,
edge becoming minutely striate and' somewhat grooved. Fundamental colour light
pink with a flush of purplish, in the centre at first darker purplish (c3), expallent,
becoming olive-green (i 5—i7), edge pink with a flush of purplish (m 4—n 6—■
n7—c6). Stipe slightly dilated at base, somewhat curved, white, flushed with light
pink (m 2) or pink all over (m4). Gills white, tapering towards the stipe. Taste
somewhat acrid.
Sporepowder white. Spores oval—broadly oval, finely echinulate, 7.5—8.5 X
6.4—7.5 JU. Fig. 1 n.
127. *R. alpina (Blytt) Moll. et Schff., Zwei Russulae von den Faröern, An-
nales Mycologici, vol. 38, p. 332—334.
Egilstaðir, 19.VII.1935. Lindabrekka and Lón, 26.VII.1935. Laugarvatn, 5.VIII.
1935. Reykir at Álafoss, 7.VIII.1935. Blönduós, 13.VII.1937. In birch copses and
among grass both in the valleys and in mountain pastures.
Cap 3—5 cm broad, convex-flat, at length with depressed centre, pure scarlet-
rosy (m 6—d4), light bloodred or the centre dark dull bloodred (c 1—c2) and
the edge slightly light bloodred (d4), edge slightly striate. Stipe equal, somewhat
dilated above, 3—4 cm high, up to 1 cm thick, white with low ridges and veins.
The Botany of Iceland. Vol. III. part II.
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