‘ 'il
280 AGARICACEÆ Russula
Russula agrees with Lactarius in size and some other characters
but differs in the absence of milk. ’
Fig. 63.—Section of R tis su la lejtida Fr.
One-half n atural size.
The sclerotia and perfect plants of 248 sometimes grow from the
gills of 1306 and 1307.
Sphæronema vitreum frequently grows on species of Russula and
Lactarius. gpecies 1306-1367
a. CompactiB. Pileus fleshy, margin bent inwards, without striæ,
without a distinct viscid pellicle, colour only changing with
age and the state of the atmosphere. Stem solid, fleshy
Flesh compact, firm. Gills unequal. 1306—1313
b. Furcatoe. Pileus compact, firm, covered with a thin closely
adnate pellicle, which at length disappears, margin abruptly
thin, at first inflexed, acute, even. Stem at first compact
then spongy-soft within. Gills somewhat forked, with a
few shorter ones intermixed, commonly attenuate at both
ends, thin, and normally narrow. 1314__1324
c. Rigidx Pileus without a viscid pellicle, dry, rigid, the cuticle
breaking up into flocci or granules, margin straight, never
involute or striate. Stem solid, at first hard, then softer or
spongy. Flesh thick, compact, firm, ending short of the
margin of the pileus. Gills, a few dimidiate, others divided,
rigid, dilated in front, running out with a broad, rounded
front whence the margin of the pileus becomes obtuse.
Handsome, somewhat rare. 4325__1334
d. Heterophyllce. Pileus fleshy, firm, with a thin, at first inflexed
margin, then, except 1340, expanded and striate, covered
wfrh a thm adnate pellicle. Stem solid, stout, spongy
within, sometimes becoming hollow. Gills consisting of
many shorter, mixed with longer ones, others furcate.
1335—1346
A Fragiles Pileus more or less fleshy, covered with a pellicle
which is always continuous, and in wet weather viscid and
Russula AGARICACEÆ 281
somewhat separable, margin membranous, at first convergent
and not involute, in full grown plants commonly sulcate
and tubercular, not striate in 1348, 1356 and 1363. Stem
spongy, at length wholly soft and hollow. Gills almost all
equal, simple, broadening in front, free. Flesh commonly
floccose, lax, friable. Several doubtful forms occur; 1357
is specially variable in colour.
Gills and spores white. 1347—1355
Gills and spores white, then bright lemon-yellow. 1356—1361
Gills and spores ochreous. 1362—1369
' fil«''I
,1 II
a. Compacta;.
1306. R. nigpieans Fr. (from its changing to jet-black in decay;
nigricans, becoming black) abc.
P. convex, depressed; streaky umber-tan, sometimes olive-
shaded ; mid. almost black. St. attenuate downwards, sienna-
tan, steel-greyish or faint purplish. G. rounded-adnexed, very
thick, distant, pale yellowish. Flesh white, then reddish or
pale purplish, at length black.
Odour none. Woods, mixed, etc. ; common. June-Nov. 54 X 2j X 2 in.
Becoming wholly black and in this^ character analogous with 1221.
1389 grows on decaying examples of this species.
1307. R. adusta Fr. (from its scorched appearance; adustus,
scorched) abc.
P. convex to depressed or subinfundibuhform, smooth, whitish to
pallid yellowish, at length clouded olive-sepia. St. equal,
colour as young P. G. adnate to decurrent, thin, crowded,
white then dull. Flesh unchangeable or becoming grey or
pale sooty.
Taste mild to acrid. Woods; frequent to rare, local. Aug.-Oct.
34 X 2j X i j in. Not becoming wholly black. 1390 grows upon thts
species and on 1341. Var. cceriilescens Fr. becomes blue when broken
or cut.
1308. R. albonigra Fr. (from the colours; albus, white, niger, black)
a b. Very rigid.
P. convex to infundibuliform, viscid, whitish; marg. smoky.
St. dusky, or white above, pale grey-ochreous towards base,
spotted-sooty. G. decurrent, crowded, thick, unequal,
connected by veins, dimidiate, dusky whitish or yellowish.
Flesh white, then black or sooty, not red.
Taste somewhat acrid and unpleasant to mild ; odour none. Grassy places
under trees. Aug. 3I X i | X i§ in.
1309. R. densifolia Cooke (from the crowded gills, as compared
with 1306; densus, thick, folium, a leaf) a b.
P. convex to depressed, smooth, whitish, becoming streaky-
fuliginous, grey or brownish; mid. black. St. smooth, whitish
to grey, then blackish. G. adnato-decurrent, unequal, thin.
II
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