The North American Species of Pholiota

151. Pholiota luteobadia sp. nov.

Pileus 8-20 mm latus, late convexus, glaber, glutinosus, badiorubrus; contextus luteus; lamellae luteae, angustae, confertae; stipes 1-2.5 cm longus, 1-1.5 mm crassus, luteus, subfibrillosus. Sporae 6-7.5 x 3.8-4.2 µ; pleurocystidia 48-75 x 10-15 µ subacuta; cheilocystidia 33-55 x 8-16 µ, clavata, submucronata vel fusoide ventricosa et ad apicem obtusa. Specimen typicum in Herb. Univ. Mich. conservatum est; legit prope Wilderness Point State Park, Emmet Co., Mich. 24 Sept. 1953. Smith 43222.

Pileus 8-20 mm broad, broadly convex with an inrolled margin, surface glabrous, slimy, dark bay red over all and remaining this color in drying. Context yellowish, thin, pliant, odor and taste not recorded.

Lamellae narrow close, adnate, ochre yellow and retaining much of this color in drying.

Stipe 1-2.5 cm long, 1-1.5 mm thick, equal, yellowish and drying with a yellow tone, veil rudimentary, stipe surface at maturity merely with a thin coating of fibrils, darkening only slightly at the base.

Spores 6-7.5 x 3.8-4.2 µ, smooth, apical pore minute; shape in face view elliptic to narrowly ovate, in profile elliptic to oblong; color in KOH dark cinnamon, in Melzer's reagent paler; wall about 0.25 µ thick.

Basidia 16-20 x 5-6 µ, yellow in KOH, fading to hyaline, 4-spored, clavate. Pleurocystidia abundant, 48-64 (75) x 10-15 µ, fusoid ventricose with subacute to obtuse apex, rarely branched, walls thin, content homogeneous and yellow to hyaline. Cheilocystidia abundant, 33-55 x 8-16 µ clavate to utriform or merely fusoid-ventricose.

Gill trama of a central area of parallel non-gelatinous smooth hyphae yellowish in KOH becoming hyaline, the walls smooth and the cells not greatly inflated (all young); subhymenium a very narrow subcellar zone of hyphal cells (1-2 deep) possibly subgelatinous (very slightly refractive in KOH). Pileus cutis a very thick pellicle of gelatinous ochraceous often incrusted hyphae 2-3 µ diam., loosely interwoven; hypodermium bright ferruginous, the hyphae heavily incrusted but hyphae not (yet) greatly enlarged. Context of yellowish then hyaline thin-walled closely interwoven hyphae. Clamp connections present.

Habit, Habitat, and Distribution: Gregarious in a burned area, Wilderness Park, Mich., Emmet Co., Sept. 24, 1953. Smith 43222, type.

Observations: This is a distinctive species both in the field and in the herbarium by virtue of the dark red pileus and yellow gills and stipe. Of the microscopic features the very weak development of a subhymenium appears significant, but old specimens have not been available for study.