=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 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 s.h.a.ggy, tinged flesh colour or ochre; g. subdecur.

pale; s. 5-8 cm. paler than p.; milk white; sp. echin. 9-10 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 6-7, echinulate.

=p.u.b.escens=, Fr. P. 5-8 cm. thin, exp. umbil. zoneless, whitish, margin p.u.b.escent; 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 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 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 6.

=zonarius=, Fr. P. 5-9 cm. compact, viscid, pale orange or yellowish, zoned; g. whitish; s. 5-8 cm. solid, yellowish; milk white; sp. 9-10 8.

=circellatus=, Fr. P. 5-9 cm. soon plane, wavy, viscid, brownish, zones and umbilicate disc darker; g. crowded, whitish; s. solid, narrowed below, pallid; milk white; sp. 7-8.

_L. flexuosus_ differs in yellow gills.

=trivialis=, Fr. 9-18 cm. depr. viscid, zoneless, pale yellowish or pinky tan, margin incurved; g. crowded, white; s. 3-8 cm. paler than p., hollow; milk white; sp. 9-10.

=turpis=, Fr. P. 6-14 cm. rigid, depr. zoneless, viscid, olive-umber, margin at first with yellow down; g. thin, pallid; s. 3-6 cm. viscid, olive, narrowed at base; milk white; sp. echin. 6-8.

Differs from _L. blennius_ in absence of circles of spots on pileus.

=umbrinus=, Pers. P. 5-8 cm. plane, umbil. wavy, dry, floccose, umber, not zoned; g. crowded, pallid; s. solid, very short, 2 cm. greyish white; milk white, forming grey spots; sp. 8-9.

=blennius=, Fr. P. 7-12 cm. depr. glutinous, dingy olive grey, often concentrically spotted, margin at first incurved; g. crowded; s. 3-5 cm.

viscid, coloured like pileus; milk white; sp. 7-8 6.

[=lividus=, Lamb. P. convex then plane or depr. not distinctly zoned, pale livid, centre fuscescent, viscid (?); g. subdecur. pale livid, crowded; s. livid, solid, curved; milk white, acrid.

[=impolitus=, Fr. P. convex then depr. sub.u.mb. dry, silky, not zoned, becoming pale; g. adnate, crowded, pallid; s. glabrous but not polished, reddish white; milk white, acrid.

---- _Gills rufescent or yellowish._

=rufus=, Scop. P. 6-9 cm. umb. depr. flocculose then glabrous, zoneless, rufous bay, shining; g. yellowish rufous; s. 5-8 cm. rufescent; milk white; sp. 7-9.

[=decipiens=, Q. P. moist then p.u.b.erulent, reddish flesh-colour; g.

narrow, tinged flesh-colour; s. slender, paler than p., milk very acrid; sp. 8-9.

[=maliodorus=, Boud. Smell unpleasant. P. infundib. dry, rather viscid when moist, tawny ochre or tawny brick-red, zones formed of darker spots, edge glabrous; g. subdecur. pallid then like p.; s. short, rugose; flesh tawny, milk white, acrid.

Differs from _L. quietus_ in brighter colour and acrid milk.

=capsic.u.m=, Schulz. P. 3-6 cm. obtuse, deep chestnut colour, margin strongly incurved; g. tawny; s. white with tawny fibrils; milk white; sp. 6-7.

[=t.i.thymalinus=, Fr. P. umb. then convex, depr. dry, even, glabrous, not zoned, yellow, disc rufescent; g. adnate, crowded, yellowish then flesh-colour; s. glabrous, colour of p.; milk white, acrid.

=subdulcis=, Fr. P. 3-6 cm. thin, at length depr. papillate, even, glabrous, zoneless, bay or rufous cinnamon, not turning pale; g. adnate, paler than p.; s. 3-5 cm. soon hollow, equal, rufescent, slightly pruinose; milk white, sweet at first then very slightly acrid; sp. 9-10.

var. _concavus_, Fr. P. rufous bay; g. reddish, pruinose; mild.

var. _sphagneti_, Fr. P. shining, margin crenate; s. hollow, glabrous.

=Terrei=, B. and Br. Caespitose. P. 1-2 cm. wrinkled, depr. bay; g.

decur. pallid; s. thickened at base, hollow, with orange down; smell sweet.

[=rubescens=, Bres. P. convexo-plane then depr. rarely sub.u.mb. polished, dry, edge at first incurved and white-pruinose, pinkish brick-red then paler; g. crowded, pallid then pinkish-rufescent, subdecur.; s. colour of p.; milk white, sparingly acrid; sp. 7-8.

=cimicarius=, Batsch. Smell unpleasant, oily. P. 2-4 cm. depr. or infund. wavy, dark bay brown; g. reddish ochre, subdecur.; s. 2-3 cm.

paler than p.; milk white; sp. 7-8.

Smell strong, said to resemble bugs.

=obnubilus=, Lasch. P. 2-3 cm. thin, convex, umbil. sooty brown, slightly striate; g. rather crowded, yellowish; s. 3-4 cm. stuffed, slender, paler than p.; milk white; sp. 8-9.

var. _crenatus_, Ma.s.s. P. 3-5 cm. sooty brown, coa.r.s.ely sulcate, margin crenate.

=flexuosus=, Fr. P. 7-12 cm. dry, depr. wavy, lead colour or with lilac tinge, becoming squamulose; g. thick, distant, yellow; s. 5-8 cm. stout, solid, greyish; milk white; sp. 6-8.

var. _roseozonatus_, Fr. P. rose colour, zones darker.

Differs from _L. blennius_ in yellow gills.

=plumbeus=, Fr. P. 8-14 cm. convex then infundib. dry, dull, sooty then blackish brown; g. crowded, tinged yellow; s. solid, equal, stout; milk white, acrid; sp. 6-8 4-6.

[=capsicoides=, Fr. P. compact, convex-incurved, wavy, dry, glabrous, not zoned, flesh-colour; g. broad, crowded, whitish; s. solid, short, thick.

Differs from _L. flexuosus_ in broad, crowded, white g.

[=jecorinus=, Fr. P. convex then plano-depr. rugulose with elevated ridges, zoneless, viscid, reddish liver-colour; g. distant, yellow; s.

hollow, pallid; milk white, acrid; sp. 10.

[=crampylus=, Fr. P. convex, umbil. everywhere rugulosely tomentose, zoneless, sooty red, edge downy; g. yellow; s. greyish; milk white, acrid.