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

Smith ~ Hesler

261

pale yellow in KOH and the hyphae 4-7 aL or more in diam., cells with
smooth thin non-gelatinous walls; subhymenium a distinct gelatinous
layer of narrow interwoven hyphae. Pileus cutis a thick gelatinous pellicle
of narrow (1.5-3,i) yellowish hyphae more or less appressed; hypodermial zone of hyphae 5-10 /x or more diam. with heavily pigmented
walls from rusty brown incrustations. Context hyphae loosely interwoven
and floccose, nearly hyaline in KOH, walls thin and smooth. Clamp connections present.
OBSERVATIONS: This species is close to P. avellaneifolia but the latter
has grayish gills when young, a yellowish veil, and the context stains
pinkish buff when cut.
138. Pholiota ferrugineo-lutescens sp. nov.
Illustrations: Text figs. 291-293.
Pileuts 3-7 cm latus, convexus, ferrugincus demur fulvils, ad margin em luteits, glutinosus. Lamellae adnatac, albidae demnum lignobrunneac, confertae, angustae. Stipes 6-8 cm longus, 10-15 mm crassus,
fibrillosus, fibrillis lutcis, deorsum fulvus. Sporae 5.5-7 x 4-4.5 pL. Plel1rocystidia 50-75 x 9-16 p., fusoide ventricosa. Cheilocystidia 30-50 x 8-14
pt, ad apicemr rotuildata. Specimen typicum in Herb. Univ. Mich. conservatlum est; legit propc Orick, Calif. 4 Dec. 1937, Smith 9393.
Pileus 3-7 cm broad, obtuse to convex, the margin incurved, expanding to plane or with a slight broad umbo, at first between "hazel" and
"ochraceous-tawny" (somewhat ferruginous), disc remaining yellowish
tawny, but the margin finally pale yellow, glutinous-viscid, with radial
fibrillose streaks beneath the gluten, glabrous except for veil-remnants
adhering along the margin. Context thick, cartilaginous-pliant, whitish
to watery yellowish; odor and taste mild.
Lamellae slightly adnexed, whitish at first, soon dull brown ("woodbrown"), close to crowded, narrow, equal, thin, edges even.
Stipe 6-8 cm long, 10-15 mm thick, equal, stuffed, becoming tubular,
surface fibrillose over lower portion from the pale yellowish veil remnants,
with an apical fibrillose zone from the ample fibrillose to submembranous
veil, white to whitish over all, soon stained yellow where handled and
cortex yellow when cut, in age sordid rusty brown below (inside and
out); base with dense, radiating, white hairs.
Spores 5.5-7 x 4-4.5 pL, pale tawny in KOH, about the same color
in Melzer's reagent, smooth, in face view elliptic to slightly ovate, in profile elliptic to very obscurely inequilateral, pore apical but minute, wall
somewhat thickened.
Basidia 4-spored, 26-34 x 6-8 pU, hyaline in KOH and slightly
yellowish in Melzer's sol. clavate. Pleurocystidia abundant, 50-75 x 9-16
pI, fusoid-ventricose, apex rounded to obtuse, stalk slender and often
curved, surface smooth or rarely with some debris adhering around apex,
wall thin to thickened (in the ventricose part 0.4-1.5 p. thick and yellow