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

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The North American Species of Pholiota

mum fulvus. Velum subfulvum, fibrillosuzm. Sporae 4.4-6.5 x 2.8-3.5 U.
Pleurocystidia utriformia 30-46(60) X 10-15 ft. Specimen typicum in
Herb. Univ. Mich. conservatum est; legit prope Warrcnsburg, New York,
12 Sept. 1934. Smith 798.
Pileus 3-7 cm broad, convex with a bent in margin which remains
decurved a long time, nearly plane or more rarely slightly depressed in
age but some slightly umbonate, margin at first appressed fibrillose from
patches of tawny fibrils, surface covered by a thin gelatinous layer; color
"tawny" (tawny) on disc and pale lemon-yellow ("pinnard-yellow" to
"baryta-yellow") over marginal area. Context watery firm, yellowish,
odor and taste not distinctive, FeSO4 slowly green on dried pileus cutis,
finally inky black.
Lamellae pale yellow ("Baryta-yellow"), close, moderately broad,
equal, adnate to decurrent (not at all sinuate or adnexed), edges even.
Stipe 4-6 cm long, 9-12 mm equal or nearly so, solid pale yellow
above ("pale cllalchedony-yellow") and pruinose to fibrillose-pruinose,
below dull yellow but soon rusty stained, base with matted yellowish
mycelium as dried.
Spores 4.5-6(6.5) x 2.8-3.5,.t, smooth, apical pore not distinct;
shape in face view oblong, slightly bean-shaped in profile; yellow in
KOH, in Melzer's sol. merely pale cinnamon brown; wall slightly thickened (-0.25 /).
Basidia 4-spored, 18-22 x 5-6 F, hyaline in KOH, yellowish in
Melzer's. Pleurocystidia abundant and projecting, 30-46 (60) x 10-15 pJ,
utriform (broadly fusoid-ventricose with rounded apex), when first
revived in KOH with reddish to rusty ochraceous content but clearing
on standing, finally hyaline, in Melzer's yellowish to hyaline or retaining
some brown debris, walls thin to rarely slightly thickened (~ 0.5 p,) and
either smooth or with some debris adhering, as revived often with rodlike bodies and particles in neck. Cheilocystidia smaller than pleurocystidia (26-35 x 10-16 /L) and many varying in shape to clavate to
nearly vesiculose-pedicellate, becoming hyaline in KOH and with no
distinct reaction in Melzer's reagent the walls frequently thickened and
yellow in KOH. Caulocystidia not characteristic, a few clavate hyphal
ends present above the veil line.
Gill trama in KOH of ochraceous to pale tawny parallel hyphae
with non-gelatinous walls which in Melzer's reagent are dull pale rusty
brown; subhymenium of narrow interwoven much-branched hyphae only
obscurely gelatinous in KOH. Pileus cutis a pellicle of appressed narrow
(2-3 /i) hyphae yellow to tawny as revived in KOH, the hyphal walls
smooth to minutely incrusted by bands or spirals and the walls not obviously gelatinous though the hyphae are imbedded in a gelatinous matrix;
beneath this the context hyphae 4-11 u diam., loosely interwoven and
non-gelatinous. No hypodermium evident. Clamp connections readily
observed at nearly all septa.
HABIT, HABITAT, AND DISTRIBUTION: Caespitose gregarious around