B. MERISMA. _Stems very numerous, united into an elongated column, or branched._

[=fascicularis=, Strauss. P. tubiform, split on one side, cochleate, downily scaly; flesh and connate stems violet.

[=ramosus=, Schulz. Lurid yellow. P. fleshy, plano-depr. at length deeply umbil. fibrous; s. solid, caespitose, divided into branches each dilating into a pileus at its apex; g. vein-like, anastomosing.

[=polycephalus=, Bres. Branched. P. convex then subinfundib. white, edge lobed; g. decur. white, connected by veins; s. white, downy, apex branched; sp. 6 3.5.

[=ochraceus=, Gill. P. unequally infundib. edge upturned, lobed, yellowish ochre; g. decur. almost to base of stem, anastomosing, rosy-white; s. branched, even, spotted ochre.

C. PLEUROPUS. _Stem exactly lateral._

[=spathulatus=, Fr. P. fleshy, spathulate, glabrous, brownish; g.

dichotomous, crowded, white; s. thin, glabrous.

=muscigenus=, Fr. P. 1-1.5 cm. spathulate, horizontal, glabrous, zoned, yellowish brown or fuscous, greyish white when old; g. thick, distant, branched, colour of p.; s. short, base downy; sp. 10-12 6-8.

Differs from _C. glaucus_ in being brown when moist, and from _C.

retirugis_ in having a distinct lateral stem.

=glaucus=, Batsch. Grey. P. 1 cm. ligulate, ascending, silky, not zoned; g. fold-like, tumid, distant, forked; s. short, pruinose; sp. 5 3.

D. RESUPINATE. _Pileus cup-shaped at first, fixed by the vertex, then subreflexed._

* _Growing on mosses._

[=bryophilus=, Fr. P. thin, cupulate, white, vertex forming a stem-like point of attachment, villose; g. broad, dichot., radiating from centre.

Gills acute, much resembling an Agaric.

[=jura.n.u.s=, Q. and Pat. (= _Dictyolus_.) P. wavy, 1-2 mm. diam.

snow-white, becoming split, thin, downy, springing from cobweb-like mycelium; g. fold-like, branched, broad, thin, white then cream; sp. 6-7 long.

Close to _C. bryophilus_.

=retirugus=, Fr. P. 1-2 cm. thin, exp. wavy and lobed, greyish-white, adfixed by fibrils behind; g. radiating from centre, very thin, reticulated; sp. 10 8.

=lobatus=, Fr. P. 1-2 cm. horizontal, lobed, brown then pale; g.

fold-like, distinct, branched, divergent; sp. ----.

[=muscorum=, Fr. P. thin, gelatinous, ear-shaped, dingy rufous, glabrous; g. crisped, folds divided near the margin of p.; sp. 3-4 2-3.

** _Growing on wood._

[=applicatus=, Lev. P. lobed, margin byssoid, tomentose, white; g.

vein-like, radiating from the centre, forked, white.

[=odorus=, Wetts. Reddish-yellow, strongly-scented. P. entire, solid, fleshy, convex then turbinate or subconcave, often umbil. or subwavy, glabrous, edge slightly incurved; g. thick, forked, decur.; s. solid, glabrous; sp. subgl. 3-4.

[=crucibulum=, Fr. P. cup-shaped, downy, white; g. dichotomous, broad, dingy yellow, edge obtuse.

[=Coemansii=, Rab. P. campan. tomentose, whitish, edge incurved; g.

fold-like, somewhat forked, cinnamon.

ARRHENIA, Fr.

* _Stem lateral._

[=auriscalpium=, Fr. Brown. P. thin, convex, glabrous; g. vein-like, few, distant, simple; s. exactly lateral, straight, downy.

Resembling _Hyduum auriscalpium_ in form, but smaller.

** _Pileus sessile._

[=tenella=, Fr. P. .5-1 cm. effuso-reflexed, thin, soft, blackish, becoming lobed; g. vein-like, simple, with shorter ones, dark.

[=cupularis=, Fr. P. 2-3 mm. resupinate, soft, orbicular, outside even, downy, grey; g. vein-like, simple, radiating from centre.

Resembles young condition of _Pleurotus applicatus_.

[=fimicola=, Bagl. P. resupinate, thin, concavo-patellate, flesh-colour, with a byssoid border; veins very slight, distant.

NYCTALIS, Fr.

A. SPELEAE. _Gills crowded, more or less coalescent. Very doubtful, probably morbid forms of Agarics._

[=verpoides=, Fr. P. campan. obtuse, glabrous, brown; g. very thick, coalescent; s. equal, rigid, striate, glabrous.

[=cryptarum=, Secr. Foetid. P. conico-deformed, brown; g. adnexed, undulate, subcoalescent, flocculose, fleshy-grey; s. unequal, flexuose, h.o.a.ry-fibrillose.

[=ca.n.a.liculata=, Pers. P. pallid white, oblique, sub.u.mbil. almost glabrous; g. crowded, distinct, almost simple, edge slightly ca.n.a.liculate; s. solid, subundulate, naked.

=caliginosa=, W. G. Sm. P. sub.u.mb. edge incurved, greyish, white and silky when dry, 1 cm.; g. subdecur. thick, narrow, branched, grey; s.

3-5 cm. often inflated, whitish, silky, hollow, rusty inside; sp. 5 3.

B. PARASITAE. _Gills distinct from each other, distant. Growing on decaying fungi._

[=nauseosa=, Weinm. Smell nauseous. P. fleshy, globose then hemisph.

ochraceous, pulverulent, edge involute; g. distant, forked, pallid; s.

fistulose, thick, obliquely sulcate and twisted, pallid.

Larger than _N. asterophora_.

=asterophora=, Fr. P. 1-1.5 cm. conical then hemispher. fawn, mealy with large stellate conidia; g. adnate, distant, rather forked, dingy; s.

1-1.5 cm. whitish pruinose then brownish, twisted; sp. 3 2.

=parasitica=, Fr. P. 1-2 cm. conical then exp. irreg. with grey meal formed of large, elliptical, smooth conidia; g. adnate, thick, distant, then forked and anastomosing, dusky; s. 2-6 cm. whitish, floccosely downy; sp. 5 3.5.