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

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The North American Species of Pholiota

HABIT, HABITAT, AND DISTRIBUTION: Scattered on hardwood logs,
Maple River, Emmet County, Michigan, July 6, 1953, Smith 41513 (type).
also 41667 and 73301.
OBSERVATIONS: The distinguishing features are the pileus epithelium
of globose disarticulating cells with distinct incrustations of pigment, the
large caulocystidia, spores of the P. granulosa type, and cheilocystidia of
much the same type as found in P. squamulosa. As dried the color of the
basidiocarp is very pale. This species would be best placed in the
Flocculina group were it not for the well pigmented spores with the very
minute pore.
Nauco-ia mexicana is described as having pallid distant gills in contrast to P. pseudosiparia which has close yellowish gills. The spores of
N. mexicana were pale ochraceous tawny under the microscope and no
pore was noted under high dry magnifications. A few pleurocystidia
similar to the subfilamentose cheilocvstidia were seen. Also, Murrill described the stipe as tough and fulvous. We believe that the two species
are distinct on the differences indicated and do not accept Singer's statement that N. mexicana is a synonym of Pholiota muricata (Singer, 1963,
p. 597). The globose cells of the pileus cutis indicate that both are closely
related, but before transfering N. mexicana to Pholiota we would prefer
to make a critical study of the Phaeom-arasmius-Tubaria problem.
14. Pholiota granulosa (Pk.) comb. nov.
Flammula granulosa Peck, in V. White, Bull. Torrey Bot. Club 29: 561.
1902.
Illustrations: Text figs. 19-21; pi. 29b.
Pileus 1-3.5 cm broad, convex and remaining broadly convex, margin
long remaining incurved, surface dry and covered by a dense coating of
minute erect fibrillose squamules over disc, but those toward margin
more or less granular and more appressed, margin at first hung with the
delicate remnants of the yellow ("antimony yellow") veil; color of
epicutis bright rich yellow-brown ("amber brown" to "Sudan brown"),
the yellowish ground color showing between the squamules. Context
thin, watery-ochaceous, unchanging when cut, odor and taste mild; in
KOH instantly dark brown, in FeSO4 soon olive-black.
Lamellae rather narrow (3-4 mm broad in large fruiting bodies),
broadest near stipe and tapered toward pileus margin, bluntly adnate,
close to crowded, pale yellow young ("chamois" to "antimony-yellow"),
spores not obscuring the yellow ground color, not becoming spotted,
edges even.
Stipe 3-5 cm long, 2-3.5 mm thick, soon tubular to hollow, equal,
with a pallid pad of mycelium at base, upper part pale yellow like the
gills, below the veil-line thinly scurfy-fibrillose from veil remnants that
are yellow to concolorous with the squamules of the pileus, in age becoming dark rusty brown from the base upward.