arius=, Fr. P. 4-5 cm. obovate or reniform, rather convex,
glabrous, greyish or tan; g. plano-decur. simple, albo-livid; s. round,
very short, downy; sp. ----.

Differs from _P. serotinus_ in very short s., and glabrous p.

var. _juglandis_, Fr. Gregarious; g. greyish brown.

[=pulmonariellus=, Karst. P. convex, reniform, rather strigose, even,
yellowish, intermediate stratum thick, gelatinous; g. plano-decur.
crowded, white then yellowish; s. very short.

[=almeni=, Fr. P. thin, reniform, glabrous, brownish tawny, narrowed
behind into a very short stem; g. determinately decur. divergent, paler
than pileus; sp. 7-9 x 3-4.

=serotinus=, Schrad. P. 3-7 cm. fleshy, compact, viscid, reniform or
obovate, yellowish-green, or sooty-olive; g. crowded, yellow then
pallid; s. 2 cm. with blackish squamules; sp. ----.

=mitis=, Pers. P. 1-2 cm. tough, reniform, dry, rufescent then whitish;
g. crowded, distinct, white; s. 1 cm. compressed, dilated upwards,
whitish-squamulose; sp. 4 x 2.

=gadinoides=, W. G. Sm. White. P. 1-1.5 cm. horizontal, shell-shaped,
hygr. floccose, dry; g. crowded, branched; s. minute or absent; sp. 7 x
3.

=limpidus=, Fr. White. P. 1-2 cm. obovate or reniform, even, glabrous,
hygr., narrowed behind to point of attachment; g. white, decur. to base;
sp. ----.

Differs from _P. mitis_ in being shining white and subsessile.

[=limpidoides=, Karst. P. obovoid or reniform, often lobed, soft, even,
velvety, dark grey then livid; g. decur. whitish; upper stratum of flesh
gelatinous; sp. 6-9 x 3-4.

[=subrufulus=, Karst. P. soft, subgelatinous, orbicular or reniform,
even, glabrous, rufous- or pinkish-white; g. crowded, white; s. lateral,
strigose, very short.

[=planus=, Fr. Minute, subsessile, violet then flesh-colour.

=reniformis=, Fr. P. 1-2 cm. horizontal, reniform, grey, disc depr.
plane; g. spreading from tubercular stem-like base, divergent, grey; sp.
----.

[=Kerneri=, Wettst. P. obovate or reniform, lateral, not immarginate
behind, sessile, entire, edge lobed, convex, grey, base blackish,
minutely pulverulent; g. grey, simple; sp. glob. 3-5.

=tremulus=, Fr. P. 1-2 cm. reniform, even, glabrous, disc depr. greyish
brown then pale; g. rather distant, grey; s. 1 cm. subterete, ascending,
grey; sp. 6-8 x 5-7.

Differs from _P. reniformis_ in having a stem.

=lauro-cerasi=, B. and Br. P. 2-3 cm. thin, horizontal, circular or
shell-shaped, sulcate, brownish, attached by narrowed base; g. br