Summary:
Features include small size; a hygrophanous, dark cinnamon cap; adnate, pallid gills that become dark russet to smoky fuscous with whitish edges; a white stem with pallid veil remnants forming a fibrillose volva in lower quarter; growth on leaf mold in clusters from a pallid rhizomorph; a fuscous spore deposit; and microscopic characters. The description is derived from Smith(5).
The holotype was found in Glacier National Park, BC.
Cap:
1-2cm across, "obtuse to convex, rarely obscurely umbonate when expanded"; hygrophanous, "dark cinnamon young, paler when mature and margin thin, toned gray"; moist, bald
Flesh:
thin, fragile
Gills:
adnate, close to subdistant, medium broad; "pallid becoming dark russet", or smoky fuscous finally from spores, edges whitish
Stem:
2-4cm x 0.15-0.25cm, "equal when mature, arising in clusters from a coarse pallid rhizomorph"; white; lower quarter with pallid veil remnants forming a fibrillose volva, thinly fibrillose above the volva nearly to top but often dusted with spores
Veil:
leaves fibrillose remnants on stem
Microscopic spores:
spores 7.5-10 x 3.5-4.5 microns, ovate in face view, somewhat inequilateral in side view, smooth, with colorless spot-like germ pore, "in KOH almost black (blackish brown)", in Melzer''s reagent chestnut-brown, wall about 0.2 microns thick; basidia 4-spored, 26-32 x 7-9 microns, colorless, clavate; pleurocystidia scattered, 32-47(55) x 8-12 microns, "lanceolate, apex subacute, varying to narrowly fusoid-ventricose, thin-walled", colorless in KOH and weakly yellowish in Melzer''s reagent, cheilocystidia similar to pleurocystidia; clamp connections mentioned for septa of hyphae of veil
Spore deposit:
fuscous
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