us=, Fr. White. P. 7-18 cm. thick, firm, umbil. then infundib.
edge erect, glabrous, even; g. decur. crowded, narrow, forked; s. 3-4
cm. stout, smooth, solid; milk copious, white, acrid; sp. 8-9.

=pergamenus=, Fr. White. P. 5-8 cm. plane then depr. wavy, rugulose; g.
adnate, very narrow, horizontal, tinged straw colour; s. glabrous,
discoloured, 7-10 cm.; milk white; sp. 8 x 6.

Differs from _L. piperatus_ in crowded narrow gills, longer stem, and
thinner pileus.

=Scoticus=, B. and Br. Pallid white, smell pungent. P. 2.4 cm. soon
plane, tomentose then smooth except incurved margin; g. thin, rather
broad; s. 2-3 cm. solid, tinged pink; milk white; sp. 7-8.

=involutus=, Soppitt. White. P. 2-4 cm. plane or depr. incurved edge
silky; g. subdecurrent, very narrow, densely crowded; s. 2-2.5 cm.
glabrous, solid; milk white; sp. elliptical, 5 x 3.

Differs from _L. scoticus_ and all known species in the smooth,
elliptical spores.

=torminosus=, Schaeff. P. 6-9 cm. obt. depr. slightly zoned, margin
strongly involute and shaggy, tinged flesh colour or ochre; g. subdecur.
pale; s. 5-8 cm. paler than p.; milk white; sp. echin. 9-10 x 7-8.

Differs from _L. cilicioides_ in zoned pileus and white milk.

=cilicioides=, Fr. P. 5-9 cm. soft, not zoned, exp. and depr. margin
fibrillose, pale flesh colour with rufous tinge; g. decur. somewhat
branched; s. 5-8 cm. stuffed, even, silky, not spotted, pallid; milk
white or faintly tinged yellow; sp. 8 x 6-7, echinulate.

=pubescens=, Fr. P. 5-8 cm. thin, exp. umbil. zoneless, whitish, margin
pubescent; g. crowded, tinged pink; s. 2-4 cm. pinkish then pale,
narrowed downwards; milk white; sp. echin. 7-8.

Differs from _L. torminosus_ and _L. cilicioides_ in the margin being
only downy.

=insulsus=, Fr. P. 6-9 cm. soon infundib. viscid, slightly zoned,
yellowish or reddish, margin naked; g. forked, pallid; s. 3-4 cm.
stuffed then hollow, pallid; milk white; sp. echin. 10 x 8.

_L. zonarius_ differs in the solid stem.

=hysginus=, Fr. P. 6-10 cm. rigid, umbil. viscid, thin margin incurved,
reddish flesh colour; g. crowded; s. 5-9 cm. stuffed then hollow; milk
white; sp. 10 x 7-8.

[=luridus=, Fr. P. fleshy, almost plane, even, viscid, slightly zoned,
rufous-grey, edge bent down; g. decur. whitish; milk white, acrid; s.
hollow, pallid; sp. 8 x 6.

=zonarius=, Fr. P. 5-9 cm. compact, viscid, pale orange or yellowish,
zoned; g. whitish; s. 5-8 cm. solid, yellowish; milk white;