Chapter 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. ----.

[=chrysenterum=, Bull. Entirely yellowish outside and inside. P. fleshy, convexo-plane, obsoletely umb. silky then almost glabrous; g. free, crowded, narrow; s. solid, base with white wool.

[=stiparophyllum=, Fr. Smell strong. P. exp. silky then glabrous, yellowish white; g. crowded, white; s. hollow, white, glabrous, apex mealy.

[=cerinum=, Pers. P. exp. depr. almost glabrous, waxy yellow or fuscescent; g. crowded, yellow; s. stuffed, fibrillosely striate, base glabrous, often brownish.

[=onychinum=, Fr. P. exp. subumb. dingy purple or brown, margin silky; g. yellow, crowded; s. pallid, apex reddish.

=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.

[=carneolum=, Fr. Small. P. plano-depr. obtuse, even, flesh-red then pale; g. closely crowded, very broad behind, shining white.

=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._