. 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,
hoary-fibrillose.

[=canaliculata=, Pers. P. pallid white, oblique, subumbil. almost
glabrous; g. crowded, distinct, almost simple, edge slightly
canaliculate; s. solid, subundulate, naked.

=caliginosa=, W. G. Sm. P. subumb. 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 x 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 x 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 x 3.5.

[=microphylla=, Corda. P. hemispher. soft, glabrous, naked, white; g.
adnate, entire, dingy white; s. glabrous, bluish.

[=vopiscus=, Fr. P. cup-shaped, reflexed then recurved, pallid; g.
thick, radiating from centre; s. short, excentric, curved, flocculose,
pallid.

LENTINUS, Fr.

A. MESOPODES. _Pileus subentire; s