[=scyphiformis=, Fr. White. P. infundib. glabrous; g. decur. thin; s.

thin, short, glabrous.

Differs from _O. scyphoides_ in glabrous stem.

*** _Gills truly distant, broad, usually thick._

[=tricolor=, A. and S. P. ochraceous white, thin, umbil.; g. orange, at first with rosy pruinose; s. yellowish.

[=cortiseda=, Karst. P. convex then plane, radiato-striate, glabrous, pallid; g. adnato-decur. very distant, thickish, few, pallid; s. equal, hyaline, pallid; sp. 10-11 4-6.

[=sciopoda=, Q. P. convex then umbil. rather crisped, pale straw-colour, pruinose; g. adnate, thick, sometimes branched, straw-colour then tinged rose; s. slender, wavy, velvety-pruinose, white above, grey below.

=demissa=, Fr. P. 1-1.5 cm. thin, plane then umbil. striate, shining rufous then pale; g. purplish; s. 1 cm., colour of p.; sp. 7 5. (10-12 6-8 Sacc.)

[=grisella=, Karst. P. convex, disc depr. silky, sulcate, pale fuscescent, whitish when dry; g. adnate, distant, plane, whitish; s.

equal, glabrous, apex pruinose, pale, becoming more or less smoky; sp.

6-10 2-4.

=hepatica=, Fr. P. 1.5-2.5 cm. tough, rigid, infundib. glabrous, brownish flesh-colour then pale; g. narrow, whitish, connected by veins; s. 2 cm. very tough, colour of p.; sp. 5-8 2-4.

Differs from _O. pyxidata_ in toughness, even edge of p. and pallid gills.

=muralis=, Sow. P. 1-2 cm. becoming infundib. radiato-striate, rufous brown; g. pallid; s. 1-1.5 cm. glabrous, coloured like p.; sp. rough, 10 5.

[=cuneifolia=, Karst. Very fragile. P. convex then plane, obtuse, dry, glabrous, pellucidly striate when moist, sooty, tan when dry; g. adnate, distant, thickish; broad, ventricose or broadest in front, obliquely truncate, greyish; s. apex scurfy, solid; sp. 10-12 9-10.

[=lilacina=, Laest. P. plane, violet then pale; g. deeply decur.

connected by veins, yellow; s. persistently violet.

=umbellifera=, L. P. 1-2 cm. convexo-plane, radiately striate, even and rather silky when dry, grey, yellow, brownish, pallid, &c.; g. very distant and broad behind, colour of p.; s. 1 cm. colour of p.; sp. 3 2.5.

var. _myochroa_, Fr. P. brownish umber; s. strigosely rooting.

var. _abiegena_, B. and Br. Pale yellow.

var. _viridis_, Fl. Dan. Every part pale green.

[=Kalchbrenneri=, Bres. P. tough, convex, umbil. subexp. glabrous, hygr.

subochre; g. deeply decur. whitish; s. colour of p., base often brownish; sp. 8-10 4-5.

[=velutina=, Q. Downy, greyish. P. umbil. striate; g. arcuate; s.

filiform, base white floccose; sp. 8 long.

=infumata=, B. and Br. P. 3-4 mm. obtuse, greenish then smoky; g. few, broad, yellow; s. 2 cm. thin, yellow, tomentose below.

[=griseolilacina=, Steinh. Entirely greyish lilac, grey when dry; p.

umb. then exp. edge incurved, even, glabrous; g. adnate then decur.; s.

cylindrical, equal; sp. 6-9 4-5.

=buccinalis=, Sow. White. P. up to 1 cm. trumpet-shaped, plane or depr.; g. deeply decur. triangular; s. expanding into p.; sp. ----.

[=hirsuta=, Q. (= _O. caricicola_, Lasch). Hyaline-white, soon flaccid.

P. umbil. convex, very thin; gills or folds obliterated; s. capillary, short, pilose, base bulbillose; sp. rough, 9 long.

=retosta=, Fr. P. 1-2 cm. plano-depr. umber, polished and pale when dry; g. distant, broad, narrowed at both ends, paler than p.; s. 2 cm.

glabrous, paler than p.; sp. ----.

Differs from _O. umbellifera_ in having gills narrowed behind.

=abhorrens=, B. and Br. Foetid. P. 1-1.5 cm. umbil. brown then pale; g.

narrow, pale; s. 2 cm. slender, apex thickened, colour of p.; sp. ----.

=pseudoandrosacea=, Bull. P. convex, umbil. then infundib. plicate, edge crenulate, whitish or grey; g. deeply decur. segmentoid; s. slender; sp.

5-7 3-4.

=griseo-pallida=, Desm. P. plane, umbil. even, glabrous, brownish grey then pale; g. broadest behind, grey; s. stuffed, fuscous, 1 cm.; sp.

Differs from _O. umbellifera_ and _O. rustica_ by p. not being striate when moist.

=albidopallens=, Karst. P. convex, orbicular, scarcely umbil. pellucidly striate, naked, hyaline white or pallid; g. adnate, decur. crowded, pallid; s. equal, naked, pallid; sp. 4-5 3.

[=schizoxylon=, Fr. P. thin, almost plane, umbil. glabrous, grey; g.

narrow, paler than p.; s. rufous brown.

[=bibula=, Q. P. umbil. when moist, silky, olive-yellow then grey; g.

arcuate, broad, citrin; s. tinged citrin.

Near to if not identical with _Hygr. Wynniae_.

=stellata=, Fr. White. P. convex, umbil. diaphanous, striate; g. very distant, thin, broad; s. equal, base radiately floccose; sp. 4 6.

II. MYCENARII. _P. at first campanulate, margin straight, adpressed to stem._

* _Gills broad, perfect, unequal._

=campanella=, Batsch. P. 1 cm. convex, umbil. striate, hygr. rusty yellow; g. connected by veins, arcuate, yellow; s. 2-3 cm. h.o.r.n.y, bay, base narrowed, tawny-strigose; sp. 6-7 3-4.

var. _badipus_, Cke. Base of s. slightly bulbous.

var. _papillata_, Fr. P. acutely conical.

var. _myriadea_, Kalchbr. Small, caespitose.

[=incomis=, Karst. P. convex, umbil. glabrous or broken up into squamules, pale fuscous; g. adnato-decur. broad, white; s. tough, thinner below, colour of p.; sp. ----.

[=psilocyboides=, Karst. P. convex, umbil. glabrous, tawny yellow; g.

very broad, yellowish-white; s. 8-12 cm. equal, bay, white-fibrillose, apex paler and pruinose; sp. ----.