The North American Species of Pholiota

95. Pholiota scabella Zeller, Mycologia 25: 386. 1933.

Pileus 6-10 cm broad, hemispheric to piano-expanded, dry, ochraceous, buff, to "Dresden brown," squamose to subsquarrose, shiny, cuticle separable. Context 8-12 mm thick, white to creamy; odor like certain green crushed stems (willow-like); taste bitterish acrid.

Lamellae adnate, with striate lines on the stipe (not a tooth) Saccardo's umber to sepia, narrow (4-5 mm broad), narrower in front than toward stipe, almost equal, close (not crowded), edges wavy.

Stipe 7-9 cm long, 15-20 mm thick, ivory-yellow and squarrose above, cream-buff and squamose scaly below annulus, staining ochraceous-buff or darker where bruised, almost equal, slightly tapering upward, solid and whitish within. Annulus membranous, persistent, 3-4 mm broad, median, deflexed, colored by the spores.

Spores 6-8.5 x 3.7-4.5 µ, elliptic to subovate, in profile slightly inequilateral; smooth, germ-pore minute.

Basidia 23-38 x 9-15 µ, 4-spored. Pleurocystidia of two kinds: 1) chrysocystidia 25-28 x 9-15 µ clavate-mucronate to subfusoid, often with an amorphous content; 2) leptocystidia 50-54 x 10-17 µ, fusoid-ventricose to subcylindric, erratic in occurrence. Cheilocystidia 45-54 x 13-16 µ, fusoid-ventricose.

Gill trama slightly interwoven, hyphae 3-6 µ broad; subhymenium not distinctive. Pileus trama radial, somewhat interwoven. Cuticle not sharply differentiated, not viscid, the surface bearing some fascicles (the scales) of brown hyphae 6-12 µ broad and usually faintly incrusted. Clamp connections present.

Habit, Habitat, and Distribution: On soil, solitary, in dense coniferous forests, Oregon, October. Type studied.

Observations: We include this species with some reservations. A shiny pileus is not consistent with the scaly condition as described. It seems amply distinct as a species on macroscopic features, and the spores are certainly Pholiota-like.