The North American Species of Pholiota

128. Pholiota iterata sp. nov.

Illustrations: Text figs. 502-503; 506.

Pileus 3-7 cm latus, late convexus vel obtuse umbonatus, ad centrum vinaceo brunneus, ad marginem subluteus, glutinosus; stipes 3-7 cm longus, 3-8 mm crassus, luteo fibrillosus. Vellum siccum, luteum; sporae 7-9 x 5-6 µ; pleurocystidia 60-85 x 9-18 µ fusoide ventricosa, crasso tunicata. Specimen typicum in Herb. Univ. Mich. conservatum est; legit prope Cave Junction, Ore., 1 Dec. 1937. Smith 9318, in pinetis.

Pileus 3-7 cm broad, obtuse to convex, expanding to broadly convex or with a slight umbo, margin inrolled at first, margin at first decorated by superficial remains of the veil, glabrescent, slimy viscid; colors dull to vinaceous brown over the disc and pale ochraceous to pallid brownish on margin, marginal area yellowish in dried specimens. Context pliant, yellowish in age, odor and taste not recorded.

Lamellae close, adnate or with a decurrent tooth moderately close to subdistant, yellowish pallid young, soon olivaceous-yellow and then dull rusty brown, edges even.

Stipe 3-7 cm long, 3-8 mm thick, equal, apex yellowish and silky-fibrillose, fibrillose downward from the annular fibrillose zone left by the broken veil, veil fibrils pale yellow, veil dry or with a thin layer of slime over exterior which extends from the cap margin a short distance; stipe dry below veil line, not appreciably discolored below—merely dingy brownish.

Spores dark rusty brown (near russet in deposits on stipe) in mass, 7-9 x 5-6 µ, smooth, apical pore distinct but minute, shape in face view broadly ovate to broadly elliptic, in profile broadly elliptic to very obscurely inequilateral; color in KOH dull tawny, fading to pale ochraceous, slightly paler in Melzer's reagent; wall about 0.25 µ thick.

Basidia 4-spored, 18-25 x 6.5-9 µ, broadly clavate, many with ochraceous content in KOH; pleurocystidia 60-85 x 9-18 µ fusoid-ventricose, neck greatly elongated, apex 4-6 µ broad, obtuse to subacute, wall 1-3 µ thick in ventricose part; content yellowish to hyaline in KOH and homogeneous or as a colloidal plug of material in the neck, content scarcely colored in Melzer's reagent. Cheilocystidia subclavate to ventricose and 30-55 x 8-12 µ or 40-60 x 9-15 µ, and fusoid-ventricose, mostly thin-walled and with yellow content in KOH (with some encrusting material variously over exterior in some-possibly paraffin from waxed paper). Caulocystidia none observed except for a few semi-erect clavate ends of cortical hyphae.

Gill trama of a wide central area of subparallel hyphae yellowish to hyaline in KOH, walls thin and smooth, cells short to long and becoming inflated; subhymenium poorly developed as a narrow somewhat gelatinous zone of hyaline narrow (3-4 µ) hyphae. Pileus cutis a thick gelatinous pellicle of hyphae 2-4 µ diam., loosely interwoven, yellowish in KOH and some with incrusted walls; hypodermium a zone of non-gelatinous more or less inflated hyphae with heavy ochraceous incrustations as revived in KOH; context hyphae yellow in KOH, thin walled, interwoven, and cells greatly inflated. Clamp connections present.

Habit, Habitat, and Distribution: Gregarious on needle carpet under pine, Cave Junction, Ore., Dec. 1, 1937. Smith 9318, type.

Observations: This species is obviously very close to P. subminor in cystidial and spore features. It differs in growing on duff under conifers instead of on oak logs, in the stature of the basidiocarps, and in the weaker development of the gelatinous subhymenium. From P. velaglutinosa it is readily distinct in its larger spores and less gelatinous veil.