The North American Species of Pholiota

49. Pholiota galerinoides sp. nov.

Pileus 10-15 mm latus, glabrosus, "russet" demum cinnamomeo-brunneus deinde pallide fulvus. Odore et gustu non proprius. Lamellae late adnatae, latae, confertae vel subdistantes, paene "russet" demum brunneae recentes, concolores maturae, marginibus crenulatae. Stipes 1-2 cm longus, paene 1.5 mm crassus, pallido-brunneus deinde obscurior, infra veli reliqua. Sporae 7-9.5 (10.5) x (3.5) 4-5 µ, ellipsoideae vel oblongae, planae, truncatae, crassitunicatae. Pleurocystidia 28-42 x 9-14 µ, clavata; cheilocystidia 20-38 x 4-7 µ, ampullacea. Cuticula non accurate distincta. Caulocystidia acervatim, pleurocystidis et cheilocystidiis similia. Specimen typicum in Herb. Univ. Mich.; lectum in Mt. Rainier National Park, 6 Oct. 1952, Smith 40612.

Pileus 10-15 mm broad, convex with a straight margin, expanding to broadly convex to nearly plane, surface viscid, glabrous, "russet" to "cinnamon brown," fading to dark rusty brown, hygrophanous, translucent-striate on margin before fading, when faded a dingy ochraceous tan. Context thin, very fragile, odor and taste not distinctive.

Lamellae broad, close to subdistant, broadly adnate, russet to cocoa-color when young, concolorous with moist pileus when mature, edges minutely crenulate.

Stipe 1-2 cm long, about 1.5 mm thick, equal, fragile, tubular, paler than the gills near apex, soon very dark russet brown over basal area, lower portion dotted with flecks of veil tissue, apex pruinose, in age nearly glabrous.

Spores 7-9 (10.5) x (3.5) 4-4.5 µ, smooth, wall slightly thickened, apex truncate from a small apical pore; in face view narrowly elliptic to oblong, in profile nearly oblong to obscurely inequilateral, pale ochraceous in H2O when fresh, pale cinnamon as revived in KOH; apiculus small but readily apparent; in Melzer's reagent pale cinnamon.

Basidia 4-spored, 18-22 x 5-6 µ, hyaline in KOH and Melzer's reagent, clavate. Pleurocystidia 28-42 x 9-14 µ, clavate to utriform, hyaline in KOH, content homogeneous, thin-walled, smooth. Cheilocystidia 20-35 x 4-7 µ, lanceolate to ventricose-rostrate, the neck often only 2 µ thick, apex acute to subcapitate, hyaline, thin-walled, content homogeneous. Caulocystidia scattered, clavate, mostly thin-walled but wall colored in KOH and in some slightly incrusted. Hyphae of the stipe cortex bright cinnamon in KOH and smooth, cells 8-18 µ wide.

Gill trama of parallel non-gelatinous hyphae with incrusted cinnamon-colored walls (especially near the thin nongelatinous subhymenial area). Pileus trama of interwoven cinnamon colored pigment incrusted hyphae and revived in KOH. Pileus cutis a well developed pellicle of gelatinous hyphae 3-5 µ diam., hyaline in KOH and with incrustations only on the hyphae nearest the context. Clamp connections present. All hyphae non-amyloid.

Habit, Habitat, and Distribution: On a wet seepage swampy area on very decayed conifer wood, Carbon River, Mt. Rainier National Park, Wash., Oct. 6, 1952. Smith 40612, type.

Observations: This is a Psilocybe-like species in pigmentation save that the spores are pale ochraceous in water mounts of fresh material. Deposited spores on the stipe were near cinnamon brown but this should be checked from a deposit on white paper. The clavate to utriform pleurocystidia and very small ventricose-rostrate cheilocystidia make a peculiar combination of cystidial features. It is a curious feature that the hyphae of the stipe cortex should be smooth when those of the gill and pileus trama show incrustations.