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

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The North American Species of Pholiota

KOH (not reviving well); subhymenium a gelatinous layer of narrow
(~ 2.5,) hyaline hyphae. Pileus cutis a gelatinous pellicle of interwoven
narrow (1.5-2.5 /u) hyaline to yellowisll hyphae; hypodermial region
highly colored. Clamp connections present. All hyphae non-amyloid.
HABIT, HABITAT, AND DISTRIBUTION: In woods along streams, Idaho,
July; type studied.
OBSERVATIONS: The small size, strongly developed yellowisl white
veil, and the yellow to greenisl yellow flesh are distinctive. It is close to
P. tottenii, in which brown tints are in the pileus, the flesl pale-buff,
an(t the gills emarginate and broad. We have found no record of its
occurrence other than the type.
The microscopic data are from tile type. The species is typical of
subgenus Flammuloides and appears close to P. graveolcns.
174. Pholiota vialis (Nlurr.) comb. nov.
Flanmmila vialis Murrill, Mycologia 4: 262. 1912.
Gymrnopills vialis Murrill, Mycologia 4: 255. 1912.
Illtstri-tiolis: Text fis. 384-386i.
Pileus 5 cm broad, convex to expanded, at lengtl depressed, dark
flavo-luiteous with bay center or tle entire surface bay, splitting radially
at the margin, viscic, glabrous, smooth, at length rimose.
Lamellae adnate, citrinous to ferruginolus-fulvous, ventricose, 1)roal,
raItler crowded.
Stipe 5 cm long, 10-15 mm thick, citrinous, equal or inflated, solid
or 1ollow, fibrillose, especially at the top wlhere a slight trace of tlle
fugacious veil remains.
Spores (6) 7-9 X 4-4.5 (5) /z, smooth, apical pore minute; shape in
face view oblong to elliptic, more rarely ovate, in profile mostly somewlat illequlilateral; color revived in KOH, dull cinnamon-brown, in
Melzer's reagent paler; wall about 0.3 /u thick.
Basidia 23-30 x 5-7 /J, 2- and 4-spored, clavate, yellowish in KOH
an(I in Melzer's reagent. Pleurocystidia 36-75 x 7-15 IL, fusoid-ventricose
varying (rarely) toward utriform or subclavate, wall thin smooth and
hyaline, content amber-brown to yellow and on standing in KOH gradually becoming hyaline, homogeneous. Cheilocystidia 33-52 x 7-12 F,
sul)fusoid, utriform, or fusoid-ventricose, smooth, tlin-walled, walls
yellowisll in some, content soon homogeneous (in KOH). Caulocystidia
none found.
Gill trama with a central floccose area of somewhat interwoven
hyphae, cells elongate and up to 15 p, broad, walls thin and smooth,
yellowish to hyaline in KOH; subhymenium a distinct gelatinous layer
of somewhat interwoven hyphae 2-3,u broad. Pileus cutis a well developed pellicle of interwoven narrow (1.5-3 /u) lhyaline to ochraceous
hyplae with smooth walls but toward hypodermium some with tawny