The North American Species of Pholiota
21a. Pholiota proximans var. subauripes var. nov.
Pileus 1-3 cm latus, fibrillose squamulosus, fulvo-ochraceus. Lamellae ochraceae, confertae, sublatae. Stipes fulvo-ochraceus. Specimen typicum in Herb. Univ. of Mich. conservatum est; legit prope Telluride, Colo., Smith 52459.
Pileus 1-3 cm broad, convex with an incurved margin expanding to broadly convex or nearly plane, surface dry and minutely fibrillose-squamulose over disc and appressed-squamulose near margin, color golden fulvous fresh, dull ochraceous dried. Context thin, yellow, odor and taste not distinctive.
Lamellae ochraceous when young, becoming dull fulvous, dull yellow-brown as dried and darker than dried pileus, moderately close, broad, adnate-seceding, edges even.
Stipe 2-4 cm long, 1-2.5 mm thick, equal, becoming tubular, concolor with pileus and the same when well dried, (not darkening from base upward), but in age dingy yellow-brown over all, veil rudimentary.
Spores 7-9 (10) x 4-5 µ, smooth, rusty brown in KOH, paler in Melzer's reagent, in face view oblong to subovate, occasionally somewhat angular, in profile somewhat bean-shaped to obscurely inequilateral, with a very minute but distinct apical pore.
Basidia 4-spored, narrowly clavate, 20-24 x 6-8 µ, yellow in KOH. Pleurocystidia none. Cheilocystidia clavate 18-30 x 9-15 µ, walls smooth and bright yellow in KOH. Caulocystidia scattered, clavate, 26-40 x 9-15 µ, thin-walled, walls yellow in KOH, smooth.
Gill trama of inflated subparallel hyphae with thin yellow walls (in KOH), narrower near the indistinct subhymenium. Pileus trama of hyaline to yellow-walled smooth inflated hyphal cells. Pileus cuticle a trichodermium, the elements of inflated smooth (rarely asperulate) yellow to tawny cells with thin-walls. Clamp connections present. All tissues inamyloid.
Habit, Habitat, and Distribution: Solitary to gregarious on aspen, Colorado, Smith 52459 (type), 50051, 51539, 52459, 52668.
Observations: This variety may be confused with P. curvipes in the field because of its bright yellow color but the cheilocystidia are different.