The North American Species of Pholiota

70. Pholiota elongatipes (Pk.) comb. nov.

Agaricus udus var. elongatus Pers. ex Fries, Syst. Myc. 1: 292. 1821.
Hypholoma elongatum (Fr.) Ricken, Die Blatterpilze p. 250. 1912.
Naematoloma udum var. elongatum (Fr.) Karsten, Bdr. Finl. Nat. och Folk 32: 497. 1879. Naematoloma elongatum (Fr.) Konrad, Bull. Soc. Linneenne Lyon, 8 annee, n. 18, p. 135. 1929.
Agaricus elongatipes Peck, Ann. Rep. N.Y. State Mus. 29: 40. 1878.
Hypholoma elongatipes (Pk.) Smith, Mycologia 33: 5. 1941.
(Not H. elongatipes Parker, Mycologia 25: 196. 1933)
Naucoria obtusissima Kauffman & Smith, Pap. Mich. Acad. Sci. Arts and Letters 17: 188. 1933.

Illustrations: Text figs. 162-163; pl. 29a.

Pileus 6-20 mm broad, convex to obtuse, becoming broadly convex to nearly plane in age, surface glabrous and hygrophanous, margin faintly fringed with fibrils at the time the veil breaks, color pale to medium yellow with marginal area olivaceous in age when wet, paler yellow faded or often retaining an olive cast. Context thin, soft, pale yellow, odor and taste not distinctive.

Lamellae broad, adnate, subdistant, whitish to pallid yellowish at first, gradually becoming clay color to nearly wood-brown, edges at times whitish fimbriate.

Stipe 4-10 cm long, 1.5-2.5 mm thick, equal, tubular, strict to flexuous, fragile, pallid above at first but soon yellowish, silky above, with fibrillose flecs downward from the remains of the thin veil, becoming tawny from the base upward in aging.

Spores 8-11 (12) x 5-6 (7) µ, dull cinnamon brown in deposit, pale tawny in KOH under microscope and scarcely darker in Melzer's sol., smooth, apex obscurely truncate from an apical pore less than 1 µ wide, wall less than 0.5 µ thick, shape in face view ovate to subelliptic, in profile mostly elliptic.

Basidia 28-32 x 8-9 µ, 4-spored, clavate, yellow in KOH. Pleurocystidia of two types: 1) chrysocystidia 26-34 x 8-12 µ, and 2) leptocystidia 30-36 x 5-9 µ, fusoid-ventricose, apex obtuse. Caulocystidia none found on specimens examined.

Gill trama of parallel to subparallel non-gelatinous hyphae with yellow to rusty walls in KOH. Pileus with a poorly organized cutis of non-gelatinous hyphae 2.5-4 µ wide, hyphae yellow in KOH, smooth or obscurely asperulate; hypodermium of inflated hyphal cells up to 18 µ diam., walls yellow to pale fulvous in KOH and not or only very obscurely roughened. Context hyphae thin-walled, smooth, yellow in KOH. Clamp connections regularly present.

Habit, Habitat, and Distribution: Scattered to gregarious on Sphagnum during late summer and fall, across the continent wherever the proper habitat is found. We have examined specimens from Sweden as well as North America.

Observations: Smith (1951) placed this in Naematoloma but when one compares the population of North American Pholiota species with those of Naematoloma for the same region it is very clear that the only difference between the two genera is in the color of the spore deposit. Hence we have transferred this species to the group where people expect to find it.

Material Examined: MICHIGAN: type of Naucoria obtusissima; Homola 1054; Kauffman 10-20-06, Rock River, 1929; Smith 33-778, 33-821, 33-989, 6123, 14942, 31898, 31899, 32020, 42207, NEW YORK: House, 1915; Smith 335, 372, 922. OREGON: Kauffman, 1922; Smith 27655, Oct. 1952. TENNESSEE: Hesler 14250, 17198. WASHINGTON: Smith 9-25 -35, 12062, 14800, 39807, 40263, 40876, 40884, 48039. WEST VIRGINIA: Walters 131. CANADA (ONTARIO): Smith 4612, 4779. SWEDEN: Lundell 23-9-1939. SCOTLAND: D. Reid 1955.