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

Smith ~ Hesler

223

Basidia 24-30 x 5.5-7 JL, 4-spored, clavate, yellowish to hyaline in
KOH, yellowish in Melzer's reagent. Pleurocystidia abundant to scattered,
26-35 X 7-11 /u, clavate to oval-pedicellate, usually with a highly refractive inclusion which is hyaline to yellowish in Melzer's reagent, also
present are scattered cells 33-48 X 9-13 / with contracted wrinkled dark
reddish-brown content in KOH and in Melzer's. Cheilocystidia 24-35 x
5-9 /u, clavate, fusoid, to fusoid-ventricose, apex obtuse; walls thin,
yellowish to hyaline, smooth; content homogeneous and hyaline to yellowish, a few similar to the dark brown pleurocystidia also occurring.
Caulocystidia versiform and size very variable; clavate, subcylindric,
narrowly fusoid-ventricose, 25-55 X 6-9 /,; 20-40 x 5-6; 30-65 X 7-11
/u or 26-35 X 6-10 a; some elongate subellipsoid and up to 12-16 /,
diam. with walls slightly incrusted.
Gill trama when properly revived of hyaline subparallel hyphae
with elongate cells having smooth thin to slightly thickened hyaline
walls (as revived in KOH); subhymenium a narrow gelatinous layer of
compactly arranged narrow (2-5, ~+) hyaline hyphae. Pileus cutis a
thick gelatinous pellicle of narrow (1.5-4.5 /i) ochraceous to nearly
hyaline hyphae (in KOH); over this occur the remains of scales composed of reddish tawny hyphae with short cells (1:w was 2:1 compared to
3-8:1), with smooth to roughened walls, the hyphae parallel in arrangement; hypodermial region of rusty cinnamon somewhat incrusted floccose
hyphae 4-8 /L diam. Context hyphae interwoven, cells inflated, smoothwalled, walls thin to thickened slightly and showing as a pair of double
lines. Clamp connections present. All hyphae inamyloid.
HABIT, HABITAT, AND DISTRIBUTION: Caespitose in large masses on alder
and maple logs in the Pacific Northwest. Description from Smith 16892
Baker Lake, Wash., Sept. 12, 1941.
OBSERVATION: This material is the closest we have found in North
America to Lange's P. squarroso-adiposa. It has the short rather broad
spores, the yellowish young gills and the scaly cap and stipe exactly as
Lange illustrates it. Also, in the cited collections the stipe usually dries
darker at the base than at the apex.
114. Pholiota filamentosa (Fr.) Herpel, Hedwigia 49: 160. 1910.
Illustrations: Text figs. 498, 500, 501; pls. 56-57.
Pileus 5-16 cm broad, convex with an incurved margin, viscid, lemon
yellow to ochre yellow, covered with rusty brown spot-like scales, in age
these appearing as rusty stains and with remains of the inner veil as
appressed triangular patches of fibrils agglutinated and at the tips feathered out slightly; margin undulating and when young often fringed.
Context whitish, around larval tunnels becoming yellow and finally
yellow-brown; odor and taste not distinctive; color with FeSO4 olivaceous,
with Guaiac-O; KOH on pileus cutis rusty brown.
Lamellae yellow when young, becoming rusty brown at maturity,