s=, 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 x 3-4.

[=littoralis=, Q. P. umbil. plicate, white; g. free, distant; s. horny,
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 x 2.5-4.

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

Passed 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.

=splachnoides=, Fr. Inodorous. P. up to 1 cm. whitish, subumbilicate,
striate; g. subdecurrent; s. 2-4 cm. polished, reddish-brown; sp. 8 x 5.

Similar in habit to _M. perforans_, but no smell, and white subdecurrent
gills.

[=limosus=, Q. Very minute. P. plicate, diaphanous, whitish; s.
capillary, brownish.

=flosculus=, Q. P. white, umbil. sulcate; g. adnate,