The North American species of Pholiota, by Alexander H. Smith and L. R. Hesler.

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The North American Species of Pholiota

Gill trama parallel, hyphae with yellow walls that are non-gelatinous;
subhymenium indistinct. Pileus cutis a trichodermium the elements of
which become aggregated to form scales on the pileus, the cells of the
hyphae inflated (up to 25 /u) and ovate to clavate; walls smooth to
slightly incrusted, reddish cinnamon in KOH and thin. Clamp connections regularly present.
HABIT, HABITAT, AND DISTRIBUTION: Scattered on hardwood logs,
Emerson, Mich. Aug. 9, 1963 (Smith 67107, type).
OBSERVATIONS: It is very doubtful if the pleurocystidia are one-spored
basidia. No sign of a spore attached was ever seen and the material was
in excellent condition. The clavate cheilocystidia immediately place this
species near Nautcoria limtlata, see Josserand (1965). The distinctive
features of P. psendoli7nllata are the heavily incrusted hyphae, the
pleurocystidia, and the habitat on hardwoods. At the present time we are
not prepared to state that "Flammulla limrnlata" occurs in North America.
24. Pholiota corticola (Murrill) comb. nov.
Naulcoria corticola Murrill, Mycologia 4: 77. 1912.
Pileus 1-1.5 cn broad, convex to subexpanded, surface avellaneous,
isabelline, innate-fibrillose with slight tufts (resembling Panuls stipticus),
dry, margin undulate, incurved when young. Context thin.
Lamellae adnate, dull whitisl to bay-fulvous, broad, heterophyllus,
rather distant.
Stipe 1 cm long, more or less 1 mm thick, yellow, cylindric equal,
glabrous at apex, whitish pubescent below.
Spores 7-9.5 X 4.5-5 p., elliptic to ovate in face view, slightly inequilateral in profile, smooth, with a small apical callus, dark reddish
tawny under tile microscope.
Basidia 18-23 x 5-7.u, 2- and 4-spored. Pleurocystidia 40-60 x 10-16
/i, irregularly clavate, subcylindric, or narrowly fusoid-ventricose, often
with a secondary septum in the upper portion, at times with a brown
pigment, walls tliin and smooth. Cheilocystidia 37-44 X 5-8 JL, more or
less resembling the pleurocystidia, occasionally secondarily septate.
Gill trama subparallel to slightly interwoven, the hyphae 3-7 u.
broad and non-gelatinous; subhymenium distinctly gelatinous as revived
in KOH. Pileus cuticle a tangled turf of rather long brownish incrusted
hyphae. Clamp connections present.
HABIT, HABITAT, AND DISTRIBUTION: On bark of a stump, Jamaica,
December-January. Type studied.
OBSERVATIONS: No caulocystidia were found but so little material
was available for examination that we do not regard our observation as
final. The structure of the subhymenium is that of a Pholiota rather than
a Galerina, especially since the species is not related to those few Galerina
species showing a tendency to have a gelatinous subhymenium. This fea