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

270

The North American Species of Pholiota

Oil City, Hoh River, Olympic National Forest, IVash. 7 Mai 1939, Smith
13176.
Pileus 6-12 cm broad, broadly convex becoming plane or with a
somewhat wavy turned up margin at maturity, surface virgate beneatl
a tlin gelatinus pellicle, in age the margin often with agglutinated spotlike scales from the broken cuticle (not from veil remnants) color
"tawny" on disc (fulvous), paler to the margin, at times whitish at first
and decorated with inconspicuous patches of veil remnants. Context
tlick (5-6 mm near disc), whitish with a watery line above the gills,
firm, odor and taste none.
Lamellae close (67-78 reach stipe), broad (8-10 mm), adnate or
slightly adnexed, toothed, 2-3 tiers of lamellulae, white when young,
near "tawny-olive" (yellow-brown) at maturity, edges even.
Stipe 4-6 cm long, 10-12 mm thick, equal, stuffed, becoming hollow,
fleshy, surface white and at first fibrillose from veil, becoming dingy
yellowish to bister from the base upward on aging, apex silky and remaining whitisl. Annular fibrillose zone left by veil soon evanescent.
Spores 6-7 x 3.5-4 ui, oblong, or ovate or narrowly elliptic in face
view, in profile mostly slightly bean-shaped to elliptic, apical pore extremely minute, color in KOH pale tawny, in Melzer's pale tawny but
dull and some giving impression of being faintly amyloid, in H,O mounts
when fresll distinctly reddish, wall thin (0.25 U- +).
Basidia 4-spored, 25-32 x 6-8 i,, clavate, hyaline to ochraceous
revived in KOH and in Melzer's sol. Pleurocystidia abundant, 1) 36-50
x 8-12 fi and elliptic to ovate-pedicellate, walls 1-2 p. thick as revived in
KOH, content usually yellowish and colloidal. 2) 60-85 x 9-14 pi almost
subcylindric-flexuous or somewhat ventricose above the long narrow
pedicel, walls as revived in KOH 1-2 pt thick but thickening generally
irregular, apex subacute to obtuse, content colloidal and homogeneous,
lhyaline to ochraceous in KOH, surface smooth or a slight amount of
delris adhering. Amyloid debris scattered in a few places along hymenium. Cleilocystidia resembling pleurocystidia but smaller and some
enlarged basidioles (?) present. Caulocystidia none.
Gill trama of parallel to slightly interwoven hyphae with cells finally
enlarged to 10-20 Lu diam., and mostly greatly elongated; walls pale tan
to greenish yellow or hyaline as revived in KOH, thin, smooth, ratler
refractive; subhymenium a conspicuous broad gelatinous band of narrow
hyaline branched hyphae. Pileus cutis a pellicle (gelatinous), the hyphae
appressed, ochraceous in KOH and more or less incrusted, the cross walls
highly refractive in KOH; hypodermial region of floccose more heavily
incrusted hyphae 5-12,t diam. and bright fulvous to orange-fulvous in
KOH. Context hyphae, mostly smooth, interwoven, yellowish to yellowish-hyaline in KOH, cells greatly inflated, walls at times up to 1 p/ thick
in area beneath hypodermium. All hyphae inamyloid. Clamp connections
present.
HABIT, HABITAT, AND DISTRIBUTION: Gregarious on debris of Populus