The veiled species of Hebeloma in the western United States / Alexander H. Smith, Vera Stucky Evenson, and Duane H. Mitchel.

The Subgenus Hebeloma

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not elongating prominently; subclavate to crooked or misshapen. Gill
trama typical of the genus.
Lamellar and pilear tissues.-Lamellar trama typical of the genus.
Cuticle of pileus a well-developed ixotrichodermium, the hyphae 1.5-2
(Jm diam, hyaline, smooth and clamped, sparsely branched. Hypodermium a cellular layer mixed with hyphae, + clay color in KOH, ochraceous in Melzer's. Tramal hyphae of pileus typical of the genus.
Habit, habitat, and distribution.-Gregarious under conifers, near
Kellogg, Idaho, September 21, 1966 (type, MICH).
Observations.-This species somewhat resembles H. insigne but
does not have a scaly stipe and the spores are smaller. Also the cheilocystidia are much more versiform. It differs from H. fastibile in having
the cuticle of the pileus an ixotrichodermium rather than an ixocutis,
and in the + cellular hypodermium.
57. Hebeloma coniferarum sp. nov.
Pileus + 3 cm latus, plano-umbonatus, subviscidus, glaber,
"Warm Sepia" vel "Verona Brown" (obscure rufobrunneus), pallescens, saepe brunneomaculatus. Contextus pallide brunneus, odor pungens, gustus mitis. Lamellae subdistantes, latae, ventricosae. Stipes +
4 cm longus, 4 mm crassus, albofurfuraceus, deorsum sericeus et immutabiles. Velum fibrillosum, pallidum. Sporae 10-14 x 6-7 (8) Im,
limoniformes, verruculosae. Cheilocystidia elongate clavata, subapicem 6-8 JIm lata. Cuticula pileorum gelatinosa; pileocystidia praesentibus, cheilocydiis similibus.
Specimen typicum in Herb. Univ. Mich. conservatum est, Smith
86924; legit prope Independence Pass, Pitkin County, Colorado, 23 Jul
1976.
Pileus + 3 cm broad, plano-umbonate, + viscid fresh, buttons
with a faint pallid fibrillose covering, soon glabrous, color at first
"Warm Sepia" to "Verona Brown," paler in some at maturity, at
times with watery brown spots variously disposed. Context pale watery
brown fading to pinkish buff, odor slightly pungent, taste mild; FeSO4
gray in the stipe; KOH no reaction on pileal cuticle.
Lamellae broad, subdistant, ventricose in age, depressed-adnate,
not spotted and not beaded.
Stipe about 4 cm long and 4 mm thick, equal, tubular, watery
pallid within; surface pallid to whitish, pruinose-scurfy above, silky
below from pallid veil material, not discoloring in the base (as far as is
known).
Spores 10-14 x 6-7 (8) Ijm, slightly roughened under a high-dry
objective, dull cocoa colored (dull cinnamon) in KOH on fresh mate