Part 12

Differs from T. atrocinereum in hollow stem.

** Gills discoloured, with rufous or grey, spotted.

=crassifolium=, Berk. Smell strong. P. 5-10 cm. exp. wavy, flesh thin, umb. ochraceous, disc darker; g. nearly free, becoming yellowish, thick; s. solid, paler than p., pruinose; sp. ----.

=sudum=, Fr. P. 6-9 cm. soon plane, dry, greyish brown, glabrous, disc often squamulose; g. deeply emarginate, white then tinged rufous; s. 6-8 cm. solid, pallid, fibrillosely-squamulose, striate; sp. 6-7 x 3.5.

=tumidum=, P. Smell slight. P. 6-8 cm. bullate, deformed then exp. and wavy, livid grey, spotted, somewhat shining, cracking; g. white then grey with rufous tinge; s. 7-9 cm. stout, tumid, striate, white, rooting; sp. 6 x 4.

var. Keithii, Phil. and Plowr. P. rufous grey; s. dingy white, tinged red near base.

=murinaceum=, Bull. Smell strong. P. 5-10 cm. exp. sometimes subumb. grey, silky, cracking into squamules; g. deeply sinuate, broad, grey; s. grey with darker squamules; sp. ----.

=hordum=, F. P. exp. subumb. grey, dry, glabrous then breaking up into squarrose scales; g. rather distant, becoming greyish; s. 6-8 cm. whitish, glabrous; sp.

=virgatum=, Fr. P. rigid, 5-9 cm. exp. umb. very dry, greyish, virgate with radiating blackish lines; umb. often broken up into squamules; g. broadly emarginate, becoming greyish, crowded; s. 7-9 cm. striate, glabrous, whitish; sp. 6-8 x 5-6.

The only dry sp. with a virgate pileus.

IV. SERICELLA. Pileus at first silky, soon glabrous, quite dry.

* Gills broad, thickish, rather distant.

=sulphureum=, Fr. Strong smelling. Entirely sulphur yellow or p. tinged rufous. P. 3-8 cm. subumb. silky, even; g. distant; s. 5-10 cm. striate, same colour inside; sp. 9-10 x 5.

=bufonium=, Pers. P. 3-7 cm. soon plane, subumb. silky, soon glabrous, rugulose, opaque, purplish brown, umber, or tan; g. yellowish-tan then pallid; s. 5-7 cm. flocculose, coloured like p.; sp. subgl. 4-5.

=lascivum=, Fr. Smell strong. P. 4-5 cm. exp. and subdepressed, even, silky then glabrous, tan colour then pallid; g. arcuately adnexed, crowded, white; s. 4-6 cm. solid, rigid, tomentose, whitish, apex mealy, rooting; sp. 8-10 x 4-5.

var. robustum, Cke. Robust. P. whitish, silky; smell weak or none.

=interveniens=, Karst. P. convexo-plane, depr. silky then glabrous, rugulose near edge, tan then pale; g. arcuato-adnex. crowded, pallid; s. solid, equal, rooting, fibrillose, pallid; sp. 6-7 x 2-2.5.

=inamoenum=, Fr. Foetid. White. P. 2-4 cm. exp. umb. silky then glabrous, even; g. arcuato-adnexed, crowded; s. 7-10 cm. equal, solid, rooting; sp. 9-10 x 6-7.

The only white, foetid Tricholoma.

** Gills thin, crowded, narrow.

=cerinum=, Pers. P. 2-4 cm. exp. obtuse or depressed, even, dry, almost glabrous, wax-yellow or brown; g. crowded, yellow; s. 2-3 cm. stuffed, fibrillosely striate, yellowish, base darker; sp. ----.

=ionides=, Bull. P. 2-4 cm. soon plane, umb. even, dingy violet then pale; g. crowded, white, edge irreg.; s. 3-4 cm. elastic, fibrillose, coloured like p.; sp. 6-7 x 3.5.

Differs from T. humile and T. sordidum in white gills.

var. parvum, Lasch. P. reddish brown.

var. persicolor, Fr. P. convexo-plane, peach-colour, then pale; g. sinuate, white; s. paler than p.

=carneum=, Bull. P. 1.5-2.5 cm. fragile, exp. obtuse, glabrous, persistently reddish flesh colour; gills pure white; s. 2-2.5 cm. coloured like pileus, not fading; sp. 3 x 2.

=caelatum=, Fr. P. 2-2.5 cm. persistently umbilicate glabrous, brown then greyish, becoming cracked; g. crowded; s. 2.5 cm. glabrous, brown; sp. 8 x 5.

B. Pileus even, glabrous, neither villose, scaly nor viscid.