The North American Species of Pholiota

130. Pholiota alabamensis (Murr.) comb. nov.

Gymnopilus alabamensis Murrill, North Amer. Fl. 10: 199. 1917.

Illustrations: Text figs. 275; 276-278.

Pileus gregarious to subcaespitose, 2-5 cm broad, convex to expanded, slightly umbonate, pale brownish yellow, disc reddish brown, viscid, margin entire. Context yellow, thin; taste mild.

Lamellae adnate, tawny-yellow, becoming darker, rather narrow, subdistant to distant, edges entire and concolorous. Stipe 5-10 cm long, 3-6 mm thick, yellow above, fulvous below, glabrous, equal.

Spores 6-8.5 x 3.8-4.5 µ, elliptic or at times oblong-elliptic to subovate in face view, obscurely inequilateral in profile, smooth, germ-pore present.

Basidia 24-30 x 5-6 µ, 4-spored. Pleurocystidia 33-50 x 9-15 µ, flask-shaped to ventricose, apex at times crystallate, sometimes with a brown pigment, walls thickened. Cheilocystidia 37-50 x 7-10 µ, ventricose and similar to pleurocystidia, at times with a brown pigment. Caulocystidia none.

Gill trama with a central area of narrow (2-4 µ), subparallel hyphae, flanked by a gelatinous subhymenium. Pileus trama radial. Cuticle a gelatinous zone of narrow, brownish hyphae, some of which are slightly incrusted, these resting on an hypodermium of brown hyphae. Clamp connections present.

Habit, Habitat, and Distribution: On soil, clay bank, possibly attached to buried sticks or roots, Alabama, December. Type studied.

Observations: The description of microscopic characters is based on a study of the type. This species is near P. gregariformis, in which, however, the lamellae are close, the spores slightly longer and broader, and caulocystidia similar to the pleurocystidia are present.