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

Smith ~ Hesler

359

73389, 73415, 73457, 73663) which appear to belong here. Some stained
yellow slightly and some (lid not and all show more fulvous in their
coloration than is evident in P. piceina. The following is a description
of Smith 73387:
Pileus 3-6 cm broad, broadly convex, expanding to nearly plane,
surface viscid (not glutinous), disc ochraceous tawny to dark tawny,
glabrous but developing aggregations of fibrils beneath the cuticle, margin pale yellow (about "cartridge-buff"); margin stained sulphur (greenish yellow) where bruised. Context bright yellow, odor pungent, taste
mild, FeSO4 olive, Guaiac quickly blue on gills.
Lamellae close to subdistant, adnexed, moderately broad, pale sulphur yellow young, soon duller and near "Verona brown" mature
(sordid cinnamon), edges even.
Stipe 5-8 cm long, 4-7 mm thick, equal, interior bright yellow soon
fulvous below, surface pale yellow above, paler than "Naphthaline
yellow" near apex, fulvous below, glabrescent. Veil thin, yellowish.
Spores 6.5-8 X 4-4.5 /L, smooth, with a minute apical pore; slape in
face view oblong to elliptic varying to ovate; in profile somewhat beanshaped to obscurely inequilateral, color in KOH rusty cinnamon, in
MIelzer's sol. paler; wall over 0.25 /t thick.
Basidia 4-spored, 20()-25 x 6-8 u/, clavate, hyaline to yellow in KOH.
Pleurocystidia 40-7()(80)) 10-18 /u, fusoid ventricose, apex oltuse to
sublacute, wall tlin, surface smooth, content colloidal as revived ("empty"
in fresh material), yellowish to hyaline revived in KOH, nearly hyaline
in Melzer's reagent. Cheilocystidia smaller than the pleurocystidia, mostly
witl yellowish content in KOH. Caulocystidia scattered, clavate to futsoidventricose thin-walled, yellow to hyaline.
Gill trama of a central area of more or less parallel hypl)lae tlme cells
of which finall) inflate markedly (+ 15 /t), walls thin to scarcely tlickened, llyaline to yellowish, smooth, some ochraceous oleiferous hyphae
present; subhymenium a gelatinous zone of lhyaline branched hyphae
2-4 pt diam. Pileus cutis a gelatinous la)er of ochraceous to hyaline more
or less encrusted hlyphae 3-6 /u diam.; hypodermium of rusty to oclraceous-fulvolus non-gelatinous hyphae with encrusted walls and cells 4-12
(15) t dhiam., compactly arranged(, walls tlin, smooth, pale yellowish
olive in KOH. Clamp connections present.
On conifer debris, abundant in the Priest Lake area.
In this material colors are duller and are more rusty brownish
generally than in P. piccina in either the fresh or dried condition. The
sulphur stains wlicll develop slowly on the injured pileus margin are
not "green" as described for P. sltbflavida, but close enough to raise
doubts, since no truly green-staining fungus has been found. As for tIle
type, the dried specimens cited above resemble those referred to P.
spumosa. Because of the slight odor the above collections might be referred to P. g-aveolens. Because the characters on which P. spumosa, P.
graveolens and P. suibflavida are distinguished appear to be rather minor.