42 
NEW BRITISH FUNGI. 
gills adnate, flesh colour, then rufescent. Milk watery white . — Fr. 
Hym. Eur., 437. 
On the ground. Chingford, Epping Forest, Sept., 1886. 
Odour foetid when old. 
Russula albo-nigra, Krombh., p. 27, t. 70,/. 16, 17. 
Pileus fleshy, convexo-plane, depressed in the centre, at length 
infundibuliform, viscid , whitish, smolcy about the margin, flesh 
white, becoming blackish when broken, stem solid, stout, fuscous 
then blackish, gills decurrent, crowded, unequal, dusky whitish. 
— Fries Hym. Eur., 440. 
In grassy places. Kew. (G. M.) 
Probably only a variety of R. adusta. 
Russula densifolia, Seer. Mycog., i., 476. 
Pileus fleshy, compact, convex, then depressed, margin indexed, 
smooth, not striate, whitish, becoming fuliginous, grey or brownish, 
and blackened in the centre. Stem short, cylindrical, smooth, a 
little pruinose, whitish, then grey, and at length blackish. Sub- 
stance white, reddish on exposure to the air, and at length black. 
Gills adnate-decurrent, unequal, thin, white or with a rosy tint. 
On the ground. Kew Gardens. (G. M.) 
It resembles R. nigricans, but differs in being smaller, the gills 
thinner, and more numerous. Sometimes confounded with R. 
adusta, from which it differs in the flesh turning red on exposure, 
probably only a variety of the latter. 
Russula mustelina, J Fr. Hym. Eur., 441. 
Pileus equally fleshy, firm, convex, then depressed, opaque, 
margin reflexed, even ; stem solid, firm, pallid ; gills rounded - 
adnexed , crowded, connected , white, a few dimidiate. — Krombh., 
t. 61, f. 8, 9. 
Under horse chestnut trees. Kew Gardens, Oct., 1886. (G. M.) 
Russula expallens, Gillet Champ., France , ser. vn. 
Pileus fleshy, firm, convex, more or less depressed, viscid when 
moist, bright purple, purple black in the centre (6-8 cm. broad), 
when growing old this colour disappears, except on the disc ; the 
cuticle is separable ; flesh purplish underneath ; stem cylindrical, 
firm, equal, ora little thickened towards the base, purplish, with a 
mealy bloom (5-8 cm. long, 2 cm. thick) ; gills pale yellow, 
forked at the base, widening outwards. 
Under trees. Kew Gardens. (G. Massee.) 
Differs from R. drimeia, Cke., in the white spores, yellowish 
flesh, different coloured gills and pruinose stem, and it is less 
intensely acrid. The former species has been found again this year 
in Arboretum, Kew Gardens, and near Carlisle. 
Russula azurea, Bresadola Fungi Trid., t. 24. 
Pileus fleshy, convex, then flattened or depressed, soon dry, even, 
then minutely granulose ; margin scarcely striate when old, blue 
grey (amasne coeruleus ?) ; margin sometimes lilac, growing pale ; 
cuticle separable (4-6 cm. broad). Stem white, ventricose or 
clavate at the base, smooth, rather rugulose, firm, spongy within, 
