, glabrous, lubricous, base strigose.

Requires to be carefully distinguished from white forms of _M.
galericulata_ and _M. rugosa_. S. lubricous when moist, not viscid.

[=lasiosperma=, Bres. Caespitose. P. thin, conico-campan. exp. umb. edge
then upturned, rather viscid, striate to umbo, livid grey with a grey
bloom at first; g. sinuato-unc. connected by veins, whitish then grey;
s. pallid above, chestnut and white-pruinose below; sp. globose,
aculeate, 6-7.

IV. FRAGILIPEDES. _Stem fragile, dry, juiceless. Pileus
hygrophanous. Gills often discoloured._

=atroalba=, Bolton. P. 2-3 cm. campan. obtuse, disc blackish or fuscous,
whitish towards striate margin; g. free, crowded, glaucous; s. 6-10 cm.
pallid, apex darker, base swollen, strigose; sp. ----.

=dissiliens=, Fr. Smell strong, very fragile, conico-camp. obtuse,
greyish-brown then pale, grooved to middle; g. broadest in front, base
tinged grey; s. 4-5 cm. subincurved, slightly striate, dusky grey, base
strigose; sp. ----.

When compressed the stem splits into pieces which curl outwards
elastically.

=atrocyanea=, Batsch. P. 1-1.5 cm. convex-camp. sulcate, dark brown then
blue-grey, powdered with white meal, deformed umbo obtuse; g. adnexed,
whitish; s. 3-4 cm. slender, glabrous, blackish-blue; sp. ----.

=pullata=, B. and Cke. Smell slightly nitrous. P. 1.5-2 cm. dark brown,
disc blackish, obtusely umb. striate to middle; g. white; s. 5-6 cm.
coloured like pileus, rooting; sp. 6 x 3.

_M. leucogala_ and _M. galopoda_ differ in white milk in stem.

_M. atrocyanea_ differs in dark blue tinge of p. and s.

[=cinerella=, Karst. Smell very strong of meal. P. campan. entirely
striate, grey or greyish-pallid; g. broadly adnato-decur. greyish-white;
s. greyish-white, base fibrillose, not rooting; sp. ----.

=psammicola=, B. and Br. Smell strong. P. 4-6 mm. hemispherical, brown,
paler towards striate margin, sprinkled with minute particles; g.
adnexed, sinuate; s. 1.5-2 cm. umber, paler upwards, everywhere
pulverulent; sp. ----.

Differs from _M. paupercula_ in pulverulent stem and pileus.

=paupercula=, B. Smell strong. P. 2-4 mm. conical, exp. pale ochraceous,
minutely fibrillose; g. free, whitish; s. 1-1.5 cm. slender, whitish,
rooting; sp. ----.

=leptocephala=, Pers. Smell strong, solitary, entirely grey. P. 2-2.5
cm. umb. sulcate, pruinose, opaque; g. emarginate; s. 4-5 cm. slightly
striate, opaque, dry; sp. ----.

=alcalina=, Fr. Smell