Summary:
The presence of this species in the Pacific Northwest requires confirmation. It is characterized by a dingy white cap that dries whitish, narrow gills that do not become spotted, a white stem undergoing only slight discoloration near the base when old, weakly dextrinoid spores, and abundant cystidia.

Cap:
3-6cm across, convex-expanded, obtuse; dingy white, buff, or tinged ochraceous or grayish; viscid when moist, bald, (Kauffman) 2.5-5(7)cm across, obtuse becoming convex or +/- broadly umbonate, finally flat or with a broad umbo; white over all, dull white when old or when dried; bald, viscid but soon dry, (Smith(44))

Flesh:
thick on disc; white, (Kauffman), thin; white in cap [but see also under stem], (Smith(44))

Gills:
emarginate, crowded, narrow; whitish then pale tan to pale rusty brownish; edges white-fringed, (Kauffman), adnate, close, moderately broad; pallid (dull white), soon brownish and finally +/- "Verona brown"; edges even and not spotted, (Smith(44)), ''brownish ferruginous'' according to Peck, (Smith(6))

Stem:
3-9cm x 0.4-1cm, equal or somewhat bulbous at base, stuffed then hollow; white; pruinose at top, bald and innately silky-shining, (Kauffman), 4-8cm x 0.3-0.7cm, "equal, solid, brownish within, surface whitish and innately fibrillose to pruinose-scurfy at apex, naked in age and white over all (a slight discoloration confined to the interior but the exterior remaining white)", (Smith(44)), 3-6cm x 0.4-0.6cm, white; bald, apex not beaded, (Smith(6))

Veil:
none (Smith(44))

Odor:
pungent - radish-like (Smith(44)), none (Kauffman)

Taste:
pungent - radish-like (Smith(44)), none (Kauffman)

Microscopic spores:
spores 10-12.5 x 5-7 microns, elliptic, inequilateral, smooth, pale brownish under microscope; pleurocystidia and cheilocystidia rather abundant, 75 x 5-6 microns, cylindric, slender, obtuse, (Kauffman), spores 9-12 x 6-7.5 microns, in side view +/- inequilateral, ventral line in side view slightly convex, dorsal line more convex than the ventral, apex +/- obtuse to (rarely) somewhat snout-like, "an apical hyaline discontinuity typically present", surface rugulose [finely wrinkled], spore rarely slightly calyptrate, weakly dextrinoid +/- clay color in KOH; basidia 20-25 x 9-10 microns, broadly subcylindric, "reddish in Melzer''s reagent but slowly fading to orange", "hyaline refractive material in the interior present as a few particles"; pleurocystidia none, cheilocystidia "abundant and forming a continuous band, variable in size and shape", 32-110 x 3-4 x 3-7 microns, "filamentose, elongate-clavate or (more rarely) narrowly fusoid-ventricose, apex obtuse to slightly enlarged or enlargement tapered to a blunt point (no capitate or subcapitate cells cell)", colorless, "walls slightly refractive but not agglutinated"; cap cuticle an ixolattice, the hyphae 1.5-3.5 microns wide, refractive, wall roughened in some, with clamp connections; hypodermium nearly colorless in KOH, "intermediate as to type (both cellular and hyphal elements present)"; cap trama of radially interwoven hyphae red in Melzer''s reagent but soon fading; gill trama of +/- parallel hyphae reddish in Melzer''s reagent but soon fading to orange-ochraceous, (Smith(44)), spores 11-13 x 6-7 microns, roughened; cheilocystidia 40-50 x 7-9 microns, narrowly clavate to +/- filamentose, (Smith(6))

Spore deposit:
pale "Verona brown" (Smith(44))

Notes:
Hebeloma albidulum was reported by Davidson(1) for BC. It occurs in MI (Smith(44)), and NY (Smith(6)).

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