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

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The North American Species of Pholiota

torn away in sectioning; hypodermium orange-rusty in KOH from
floccose encrusted hyphae 8-18,u or more broad, walls thin to slightly
thickened. Context hyphae smooth, inflated, walls slightly thickened
(0.5 pu -) as revived in KOH and somewhat refractive. All hyphae inamyloid. Clamp connections present.
HABIT, HABITAT, AND DISTRIBUTION: On soil and rotten wood, near
Knoxville, Tenn. Dec. 11, 1951. A. J. Sharp, (Hesler 20269, type).
OBSERVATIONS: This species and P. olivaceophylla lack the gelatinous
subhymenium featuring most species with the prominent pleurocystidia.
In the dried state the gills are decidedly yellowish. The aspect of the
basidiocarps is that of a dingy P. spumosa but the subhymenium of the
latter distinguishes it. The very small and very large pleurocystidia is an
interesting combination. The cheilocystidia should be re-studied from
fresh material.
122. Pholiota olivaceophylla sp. nov.
Illustrations: Text figs. 266-267.
Pileus 6-11 cm latus, late convexus, pallide luteus, viscosus, contextus albus. Lamellae olivaceae, confertac, latae. Stipes 6-12 cm longus,
10-15 mm crassus, fibrillosus, anguste clavatus. Sporae 6-8 x 3.4-4.5 uL.
Pleurocystidia 40-70 X 9-12 l., fusoide ventricosa, rare crassitunicata.
Specimen typicum in Herb. Univ. Mich. conservatum est; legit Wm. B.
Cooke 29502, Mt. Shasta, Calif. June 1954.
Pileus 6-11 cm broad, expanding to nearly plane, yellowish tan to
whitish, with a yellowish slimy covering. Context white; odor somewhat
nutty, taste none.
Lamellae adnate, at first olive, then brown, close, broad (10 mm
more or less).
Stipe 6-12 cm long, 10-15 mm thick, fibrillose, inflated below to
25 mm, with conspicuous white rhizomorphs.
Spores 6-8 x 3.5-4.5 u/, smooth, apical pore minute, ovate to elliptic
in face view, in profile obscurely inequilateral to slightly bean-shaped,
tawny in KOH, about the same color or paler revived in Melzer's
reagent, wall thin (- 0.3 /u).
Basidia 20-25 (28) X 5-7.u, 4-spored, narrowly clavate, yellowish
in KOH and Melzer's reagent. Pleurocystidia abundant, 45-70 X 9-20
E, yellow to hyaline in KOH, content homogeneous, thin-walled or rarely
the wall up to 0.5 p, thick, fusoid-ventricose to ventricose-rostrate with
the neck narrowest at the apex of the ventricose part, neck usually filled
with a homogeneous "colloidal" substance, smooth, apex obtuse. Cheilocystidia 43-52 x 12-17 pu, fusoid-ventricose to subellipsoid-pedicellate,
yellow to hyaline in KOH, content homogeneous, at times the neck
short and apex somewhat capitate, a few seen with particles of debris
adhering. Caulocystidia none.
Gill trama a central area of greatly inflated hyphae more or less