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

Smith ~ Hesler

51

hymenium; subhymenium not distinctive. Pileus cuticle of fascicles of
appressed hyphae with cinnamon to reddish cinnamon walls smooth to
slightly incrusted as revived in KOH, cells inflated to 20 iX at times, endcells usually merely narrowed to an obtuse to subacute apex. Clamp
connections present. All tissues inamyloid.
HABIT, HABITAT, AND DISTRIBUTION: On logs, stumps and sawdust of
hardwoods, especially aspen, rarely on conifer logs such as Larix: Maine,
New York, Michigan and Missouri, in the United States, and Ontario in
Canada.
OBSERVATIONS: This species, P. rmultifolia and P. subsllphurea intergrade. However, the characters given in the key will serve to distinguish
most collections. Although the hyphae of the pileus cuticle are mostly of
uninflated cells, some inflated cells do occur and this is evidence, in our
estimation, of the evolutionary tendency toward the P. erinaceella type.
Singer believed tlhat the similarities between these fungi constituted a
parallelism and were not an indication of true relationship. We hold the
opposite view. We have followed Singer in recognizing both P. tuberculosa and P. curvipes. Some authors regard them as synonyms.
MATERIAL EXAMINED: MAINE: Bigelow (Tenn. 23833). MICHIGAN: Harding 131, 139, 151, 161, 162, 186, 187, 232, 386, 393, 422;
Langdon 11-8-93; Kauffman 6-6-10; Shaffer 612, 1753, 2167, (MICH);
Smith 33-967, 33-1104, 9547, 9558, 15060, 18855, 21468, 21559, 25606,
25712, 25753, 25837, 33822, 33894, 36310, 36350, 36692, 37587, 38399,
38849, 39687, 66971, 68792; Thiers 688, 2665, 2729, 2746, 3059 (MICH):
TENNESSEE Hesler 14195 (TENN): CANADA (ONTARIO): Beardslee 9-3-21.
8. Pholiota subsulphurea sp. nov.
Illustrations: Text figs. 5-6.
Pileuts 10-15 mnm latus, convexus, siccus, demnim snubsq itamrnlosus
flavu.s. Contextuis luteils, amanrus. Lamcllac stbdistantes, latae, adnatae,
sutbsutlphureae. Stipes 2.5-3 cm lontglts, 2.5-3 nmm cras.sus stlbsulphlureus,
dcorsulm fulvus, vellum lutelum. Sporae 6.5-7.5 x 4-4.5 ^t, leves. Pleurocystidia desunt. Cheilocystidia 28-64 x 6-10 /It; filamentoso-capitata.
Specimlen typicum in Herb. Univ. Mich. conservatunm est; legit prope
Tahquamenon Falls, Mich. 29 June 1953 Smith 41356.
Pileus 10-15 mm broad, convex with an incurved margin, becoming
plane or nearly so, surface dry and matted-fibrillose, becoming somewhat
areolate to diffracted squamulose; color bright yellow (rich sulphuryellow), in age near orange-yellow; margin at first appendiculate from
veil remnants. Context yellow but readily staining rusty, cutis quickly
rusty brown in KOH (NH40H reaction weaker), odor none, taste very
bitter.
Lamellae close becoming subdistant, horizontal, adnate, moderately
broad, sulphur-yellow young, near tawny mature, edges flocculose.