The North American Species of Pholiota

92. Pholiota fulvosquamosa Peck, Bull. Torrey Club 30: 95. 1903.

Hypodendrum fulvosquamosum (Pk.) Overholts, North Amer. Fl. 10; 281. 1932.

Pileus 6-12 cm broad, dry, convex becoming nearly plane, covered with a tawny fibrous cuticle of brownish fibrillose scales, the lighter colored flesh showing when the fibers separate into scales, sometimes concentrically cracked about the disc. Context thin, white, becoming brownish where cut; odor and taste of radish.

Lamellae adnate or joined to a narrow collar, narrow, attenuated near stipe, close, whitish becoming pinkish cinnamon then dark cinnamon, edges white-crenulate.

Stipe 5-8 cm long, 8-10 mm thick, covered below the ring with numerous erect, subfloccose, tawny scales, slightly floccose above the annulus, equal, stuffed or hollow. Veil forming an ample, membranous, persistent annulus, which is white above and tawny floccose-squamulose below.

Spores (6) 7-10 (11) x 4.5-5.5 µ, smooth, lacking an apical pore, in face view elliptic, in profile elliptic to obscurely inequilateral, as revived in KOH dark chocolate brown.

Basidia 25-28 x 7-8 µ, 4-spored, clavate. Pleurocystidia none. Cheilocystidia 20-28 x 7-9 µ, clavate-capitate, inconspicuous. Gill trama subparallel, hyphae 8-12 µ broad, floccose. Pileus trama interwoven. Pileus cuticle not sharply differentiated; surface bearing clumps of brownish hyphae (the scales). Clamp connections none. All tissues inamyloid.

Habit, Habitat, and Distribution: About the base of oak trees, Michigan, September. Type studied.

Observations: It is possible that we have here a distinct Agaricus-like genus comprising two species, Peck's and Stropharia kauffmanii Smith. The latter has dull violaceous drab gills when mature in contrast to Peck's species with dark cinnamon gills. Harper (1914, pl. 60) gives an excellent illustration of P. fulvo-squamosa. Harding (1952) thought it the same as Agaricus subrufescens, and Overholts (1927) commented that the scales on the pileus reminded him of those on A. subrufescens. The absence of clamp connections also seems to indicate a relationship to Agaricus.