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

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The North American Species of Pholiota

Specimen typicum in Herb. Univ. Mich. conservatum est; legit prope Mt.
Hood, Ore. 28 Sept. 1922, C. H. Kauffman.
Pileus 8-22 mm broad, broadly convex, obtuse, covered with small
whitish appressed silky canescence composed of elements of the sparse
trichodermium, at length these grouped into small fascicles or squamules,
color ferruginous ("Kaiser brown") beneath this coating when moist,
somewhat hygrophanous and paler when dried (as in P. confragosa).
Context concolorous 1-1.5 mm thick, odor and taste not distinctive.
Lamellae broadly adnate, ferruginous ("Kaiser brown") at maturity,
rather broad (4-5 mm), narrowed to cap margin, close to crowded, thin,
edges entire.
Stipe 2-3.5 cm long, 1.5-2.5 mm thick, equal, "cinnamon rufous,"
clothed by silky fibrils or appressed whitish scales up to the delicate
membranous fragile spreading annulus, above ring even, pruinose, concolorous within except for the narrow whitish stuffed axis.
Spores 5-7.5 x 3.8-5 /u, elliptic to ovate in face view, slightly inequilateral in profile, smooth, pale cinnamon in KOH slightly paler in
Melzer's reagent, germ pore minute.
Basidia 17-24 X 3.5-5,i, clavate, 4-spored. Pleurocystidia 30-40 X
7-9,u, slightly ventricose, apex capitate or subacute, not projecting greatly
beyond the basidia. Cheilocystidia 34-76 X 4-6 /u, filamentous or apex
enlarged and subcapitate, very numerous and conspicuous.
Gill trama subparallel, hyphae 5-9 u/ broad, walls rusty cinnamon
in KOH; subhymenium not distinctive. Pileus cutis of appressed brown
hyphae bearing a sparse trichodermium of hyaline to pale brownish
hyphae 5-15 /u diam., the terminal cell of a filament cystidioid. All hyphae
inamyloid. Clamp connections present.
HABIT, HABITAT AND DISTRIBUTION. On decayed wood, among mosses,
Oregon, September, (type, Kauffman, 9-28-22).
OBSERVATIONS: This species is clearly closely related to P. confragosa
but differs in the spores having a minute germ pore, the presence of
pleurocystidia, redder colors and the pileus is less hygrophanous.
4. Pholiota confragosa (Fr.) Karsten, Hattsvampar (Bidr. Finlands
Natur och Folk, p. 304. 1879.
Agaricus confragosus Fries, Epicr. Syst. Myc. p. 169. 1838.
Phaeomarasmius confragosus (Fr.) Singer, Lilloa 22: 577. 1951.
Illustrations: Text figs. 35-36; pl. 9a.
Pileus 1-4 (5) cm broad, obtuse to convex expanding to broadly
convex or nearly plane, surface moist and hygrophanous beneath a
whitish covering of fibrils which become aggregated into minute squamules or remain appressed causing surface to appear canescent, when
fresh dark reddish cinnamon to deep vinaceous-cinnamon, fading to pale