Differs from _M. foetidus_ in free gills.

[=saxatilis=, Fr. P. depr. striate, reddish; g. adnate, white; s.

glabrous, apex pruinose, reddish.

III. CALOPODES. _Stem short, not rooting, entering matrix abruptly, often with a small floccose tubercle at base. Gills adnate then subdecur. when p. expands._

* _Stem very glabrous upwards, shining, base simple._

=scorodonius=, Fr. Smell of garlic. P. 1.5-2 cm. soon plane, dry, rufous then pale, wrinkled; g. adnate, whitish; s. 2.5-4 cm. equal, everywhere glabrous, shining, rufous; sp. 6 4.

=calopus=, Fr. P. 1-1.5 cm. exp. even then wrinkled, glabrous, whitish; g. emarginately adnexed; s. 2-2.5 cm. even, glabrous, bay, shining, not rooting; 7 4.

Habit of _M. scorodonius_, but no smell.

=Vaillantii=, Fr. P. 1.5-2.5 cm. depr. plicately rugose, whitish; g.

broad, subdecurrent; s. 2-2.5 cm. glabrous, bay, apex paler and thickened; sp. 10 6.

_M. impudicus_ differs in purplish stem with white down when dry. _M.

foetidus_ differs in strong smell.

=angulatus=, Fr. P. 1-1.5 cm. soon exp. at length folded and angular, whitish or tinge of tawny; g. distant; s. 2-3 cm. greyish rufescent, thickened at both ends; sp. 7 4.

Closely resembling _M. Curreyi_ and _M. graminum_; differs from former in ventricose gills not attached to a collar; from the latter in the gills not being attached to a collar. _M. calopus_ differs in the shining, bay stem.

[=Kirchneri=, Thurn. P. often umb. pallid whitish brown; g. subdecur.

distant, whitish fuscous; s. filiform, glabrous, brown.

=languidus=, Fr. P. 1.5-2 cm. umbil. flocculose, rugosely sulcate, whitish tinged yellow or flesh colour; g. narrow; s. 2-3 cm. thickened upwards, pale, naked, base tawny; sp. 6-7 4.

=rubricatus=, Ma.s.s. P. up to 1 cm. soon plane, whitish tinged red; g.

adnexed, white then brownish; s. 1-2 cm. slender, incurved, hollow; sp.

6 3.

** _Stem velvety pruinose, base subtuberculose._

=foetidus=, Fr. Foetid. P. 2-3 cm. exp. and umbil. or wavy, striato-plicate, tawny bay or rufous, pruinose when dry; g. rufescent with a yellow tinge; s. 2-3 cm. hollow, bay, minutely velvety; sp. 7 4.

=inodorus=, Pat. P. thin, exp. reddish brown with adpr. silky down; g.

adnate, crowded, whitish; s. blackish red, apex pale, entirely covered with white bloom.

Differs from _M. foetidus_ in absence of smell.

[=xerotoides=, Tr. P. umbilicate, umber, striate; g. broadly adnate, becoming greyish; s. velvety, base thickened, strigose.

[=lagopinus=, Fr. P. convex, even, glabrous, pallid; g. adnate, pallid; s. pallid, white floccose half way up, apex naked.

=amadelphus=, Fr. P. 3-4 mm. soon plane, disc slightly pruinose, margin at length striate, pale reddish-yellow; g. broadly adnate, broad; s.

pallid, bay below, slightly pruinose 1-1.5 cm.; sp. 4 2.5.

var. _insignis_. G. very distant, pale umber.

=ramealis=, Fr. P. 2-4 mm. opaque, rugulose, not striate, white, disc often tinged rufescent; g. rather distant, narrow, white, adnate; s. 1 cm. white, mealy, base darker; sp. 4 2.

=candidus=, Bolt. Entirely white. P. up to 0.5 cm. pellucid, wrinkled, naked; g. adnexed; s. 1-2 cm. whitish, slightly pruinose, base tinged brownish; sp. 4 2.

B. MYCENA. _Stem h.o.r.n.y, fistulose but often with a pith, tough, dry, mycelium rhizomorphoid, cortex not floccose, edge of pileus straight and adpressed to stem at first._

I. CHORDALES. _Stem rigid, rooting, or adnate by a dilated base._

=alliaceus=, Fr. Smell of garlic. P. 2.4 cm. sub.u.mb. even then striate or sulcate, greyish; g. free; s. 6-10 cm. minutely velvety, blackish; sp. 14-16 8.

=molyoides=, Fr. Smell somewhat unpleasant. P. soon plane, even, brownish then pale; g. free, crowded, white; s. tall, hollow, glabrous, blackish brown.

[=chordalis=, Fr. P. plicate, brownish; g. adnato-decurrent, white; s.

elongated, straight, velvety, blackish brown, stuffed, rooting.

=cauticinalis=, Fr. P. about 1 cm. yellowish, even then striato-sulcate; g. adnato-decur. connected by veins, yellow; s. 3-6 cm. flocculose, bay, paler and mealy upwards; sp. 7 3-5.

[=schizopus=, Secr. P. very thin, campan. plicato-sulcate, whitish; g.

thick, distant, white, with a collar; s. whitish, base a darker dilated tubercle.

[=torquatus=, Fr. P. campan. sulcate, whitish; g. thick, attached to a collar; s. whitish, with a darker tubercular dilated base.

II. ROTULAE. _Stem filiform, flaccid, base entering matrix abruptly._

* _Stem very glabrous, shining._

=rotula=, Fr. P. 4-7 mm. umbilicate, plicate, whitish or disc slightly tinged; g. attached to a free collar encircling the stem; s. 2-4 cm.

glabrous, blackish, shining; sp. 6 3-4.

[=littoralis=, Q. P. umbil. plicate, white; g. free, distant; s. h.o.r.n.y, umber, apex pale, base downy.

=graminum=, Berk. P. up to 1 cm. umb. striate or sulcate, pale rufous, disc darker; g. attached to a collar encircling stem, few in number; s.

2-4 cm. black, shining, glabrous, apex paler; sp. subgl. 3-4.

[=epodius=, Bres. P. convexo-campan. exp. usually umb. and depr. edge at first incurved, sulcate, centre usually reticulated, reddish-yellow then pale; g. free, white then yellowish; s. very glabrous, rufescent then bay, apex hyaline, base bulbillose substrigose; sp. 20-28 2.5-4.

[=Menieri=, Boud. P. 1-3 mm. excentric, broadly sub.u.mb. punctulate tawny; g. fold-like, few, branched, paler than p.; s. curved, tawny, base black; sp. 18-25 5-7.

[=faveolaris=, Fr. P. sulcate, exp. disc coloured; g. attached to a ring, anastomosing to form cells; s. glabrous, subulate, bay below.

=androsaceus=, Fr. P. 1-1.5 cm. whitish, umbilicate striate; g. adnate to stem; s. 3-6 cm. black, glabrous, polished; sp. 7 3-4.

[=sclerotipes=, Bres. P. thin, convex, edge incurved then plane, ruguloso-striate, shining white, umbil. yellowish, subflocculose; g.

distant, adnate, white, edge fimbriate; s. filiform, tinged rufescent downwards, adnate to a rufescent sclerotium.

Pa.s.sed as _Collybia cirrhata_ very frequently. The latter differs in not springing from a sclerotium. _Collybia tuberosa_ differs in growing on fungi.

[=Bulliardi=, Q. P. plicate, dingy yellow brown; g. whitish; s. bay.