Differs from _C. Friesii_ in being at first covered with brown tomentum which breaks up into flecks.

[=Friesii=, Q. P. elliptic-oblong then exp. 1-2 cm. finely striate, white apex tinged yellow, edge rosy; g. free, reddish then black; s. 2 cm. white, pulverulent, base swollen and floccose; sp. angularly glob.

10.

Differs from _C. tigrinellus_ in not having a brown veil.

[=cupulatus=, E. Jacob. P. subcampan. greyish yellow, with a floccose greyish white veil then p.u.b.escent, sulcate, 4-5 mm.; g. free; s. 5-7 cm.

white, downy, striate, base swollen; sp. 7-8 6-7.

=fimetarius=, Fr. P. 2-2.5 cm. clavate then conico-exp. soon splitting, disc even brownish, at first covered with squarrose floccose scales, then naked; g. free; s. 10-15 cm. white, squamulose, base solid; sp.

12-14 7-8.

var. _pullatus_, Fr. P. with adpressed squamules, soon naked, dark; s.

soon smooth.

var. _cinereus_, Fr. P. floccosely mealy then naked, grey; s. rootless, hollow to base.

var. _macrorhiza_, Fr. P. at first with feathery squamules; s. short, rooting.

[=Queletii=, Schulzer. P. ellipsoid-conical then exp. deeply sulcate, whitish, apex glabrous tinged cinnamon, with fugacious flecks; g. free; s. white, flocculose then glabrous, ventricose below, rooting with long brown fibres; sp. 10-12 4-6.

[=laxus=, Bres. and Schulz. P. subglobose, grey, disc yellowish cinnamon, granularly floccose; g. free; s. white, tinged brown at base, with white flecks, bending over as it dries; sp. 6-8 4-5.

[=Albertinii=, Karst. P. campan. sulcate, greyish-white, disc brownish, with fine network of fibrils; g. free; s. white, silky-floccose; sp.

10-12 6.

[=Strossmayeri=, Schulzer. P. digitaliform, then conico-campan. whitish then grey, apex darker, finally pale ochre, with deciduous squarrose scales; g. free; s. white, pruinose, springing from a compact, branching blackish-brown mycelium; sp. 7-9 long.

*** _Veil formed of white meal, or hyaline vesicles. Not glistening or micaceous._

=tuberosus=, Q. P. campan. 3-5 mm. finely striate, white then greyish, veil of hyaline vesicles; g. blackish violet; s. 2-4 cm. slender, wavy, white, downy, springing from a small black sclerotium; sp. 12 long.

Smaller than _C. niveus_, and springing from a sclerotium.

[=cineratus=, Q. P. campan. 1-2 cm. striate, white then greyish violet, veil of dusky hyaline vesicles; g. free, close to stem; s. 4-6 cm.

white, base rather swollen and sheathed by remains of a volva; sp. 10 5.

=filiformis=, B. and Br. P. 1-2 mm. cylindrical, striate, grey, mealy; g. linear; s. 1-1.5 cm. slender, hyaline, sprinkled with hairs; sp.

subg. 5 4.

[=luxoviensis=, Mont. P. ovoid then campan. striate, mealy then naked and grey, disc tawny; g. distant; s. with spreading fibrils, soon naked, white, springing from a spreading mycelium; sp. ----.

[=caducus=, Harz. P. oval then cylindrical, striate, grey then blackish brown, at first densely covered with white meal which becomes grey; g.

from a collar; s. greyish brown above, whitish below; sp. 9-10 6-7.

[=Britzelmayri=, Sacc. and Cub. (= _C. macrosporus_, Brit.) P. and s.

covered with snow-white meal; g. adnexed; s. tall; sp. 20 10-12.

[=albulus=, Q. P. almost hemispherical, 5 mm. pellucid, striate, pulverulent; g. arcuately adnate; s. 2 cm. filiform, pulverulent, lower half with white flecks; sp. 13 long.

[=divergens=, Brit. P. parabolic, brownish then dark grey, deeply striate; g. blackish-grey; s. pellucid, whitish; sp. 10-11 6-7.

Intermediate between _C. tomentosus_ and _C. niveus_.

V. _Volva and ring absent. Pileus covered with glistening particles when young._

=micaceus=, Fr. P. 3-6 cm. oval then campan. glistening then naked, sulcate, tawny ochre; g. adnexed; s. 5-8 cm. white, silky, hollow.

[=marcescens=, Karst. P. campan. sulcate, whitish at first, soon dingy ochre, then pale sooty grey, disc brownish yellow, micaceous; g.

adnexed; s. white, silky; sp. 6-9 4-6.

Differs from _C. micaceus_ in p. becoming sooty grey.

=aratus=, B. P. 5-8 cm. narrowly elliptical then campan.-umber, grooved up to disc; g. slightly adnexed; s. 10-15 cm. snow-white, silky, hollow; sp. 15 10-11.

=stercorarius=, Fr. P. 2.5-3 cm. ovate then campan. edge striate, densely covered with white glistening meal; g. adnexed; s. 7-12 cm.

white, hollow, minutely mealy at first; sp. 14-15 8.

_C. niveus_ differs in tomentose p., and _C. albus_ in sulcate p.

=radians=, Fr. P. ovate then campan. 2.5-5 cm. edge striate, disc granuloso-squamulose, tawny ochre then pale, glistening; g. slightly adnexed; s. 3-5 cm. white, smooth, base with dense radiating strands of mycelium; sp. 7 4.

=truncorum=, Fr. P. globose at first then campan. glistening then naked, tawny ochre, striate, 2-4 cm.; g. free, rosy then black; s. 7-10 cm.

slender, white, glabrous, hollow; sp. 12-14 6.

Differs from _C. micaceus_ in p. being globose at first, and not sulcate, and in free, rosy g.

[=inamoenus=, Karst. Foetid. P. subcylindrical then exp. blackish with white micaceous scurf; g. fixed to a remote collar; s. hyaline, at first downy, often rather wavy, several stems springing at intervals from a prostrate mycelium; sp. 7-11 4-6.

[=intermedius=, Penzig. P. campan. pallid, even, with dense reddish micaceous scurf near apex; g. free; s. glabrous, tinged pink; sp. 7.5-9 5.

[=frustulosum=, Sacc. P. campan. rather acute, even, covered with reddish micaceous meal; g. free; s. conical then cylindrical, white; sp.

8 6.

VI. _Volva, ring, and veil absent; flesh very thin, pileus soon splitting along the lines of the gills, scurfy or glabrous._

* _Pileus more or less scurfy._

+ _Gills attached to stem._

-- _Pileus white._

[=conditus=, G.o.dey. P. globose then ovoid, striate, sometimes tinged yellow; g. adnate; s. 20-25 mm. shining, scurfy; sp. ----.

[=stellaris=, Q. P. ovoid then campan. 1-2 mm. striate, snow-white then greyish, crowned with pellucid vesicles; g. adnate; s. 1-2 cm. long, filiform, hyaline, velvety; sp. 8 long.

---- _Pileus coloured._

[=coopertus=, Fr. P. conico-campan. 2.5 cm. striate, lurid, densely micaceous, yellowish grey when dry; g. adnate, broad; s. 3-5 cm. pallid, apex with white flecks; sp. ----.