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Small, white, hairy basidiomycete cup fungus fruiting in dense colonies on (suspected) Pinus contorta branch. Cup: sessile, 0.3-1.3 mm height and diam. Hairs: 200-350 x 3.0-4.5.0 µm diam., flexuous, inamyloid, granule-encrusted, smooth at base, rounded or long tapered tips. Basidia: 4-spored, clavate, 27-35 x 3.4-5.3 µm, sterigmata ~3 µm. Spores: (5.5)6.0-6.7(7.4) x (1.9)2.1-2.7(3.0) µm, subcylindric to assymetrically ellipsoid, subfalcate, with prominent apiculus.

On rotten Betula papyrifera wood. Apothecia: up to ~3.5 mm. Asci: 77-87 x 7.3 µm, tips amyloid; with croziers; paraphyses filiform, septate, about as long as asci, 1.5-2.0 um diam. Subiculum hyphae: septate, thin-walled, smooth, hyaline, 1.7-2.5 µm diam. External hairs: reddish brown to yellowish, multiseptate, enlarged at tips, 40-60 x 3-5 µm diam. Spores: (11.9)13.8-18.1(24.6) x (2.6)(2.8-3.5(4.5) µm, fusiform, 1-3 septate,

Apothecium: up to 0.7 mm wide, up to 0.4 mm tall, white smooth hymenial surface, white hairy exciple surface, stipitate
Stipe: 0.5 mm tall, 0.2 mm wide, white, hairy
Odor: insignificant
Taste: not sampled
Habit: gregarious
Substrate: old Rubus armeniacus cane
Habitat: urban park forest with Populus trichocarpa, Pseudotsuga menziesii, & Arbutus menziesii
Elevation: 13 m
Hairs: clavate to subclavate, mostly 60-70 µm x 3-4 µm
Paraphyses: lanceolate, longer than asci, avg 60 µm x 5 µm
Asci: cylindric, avg 45 µm x 4 µm
Ascospores: fusiform, avg 6.6 µm x 2.2 µm

The velar remnants and stipe texture remind me of a Pholiotina.
Spores 8.5-9.5 microns (some smaller, some up to 11 microns long).
Ochre brown in KOH. Germ pore present.
Cheilocystidia sinuous-cylindrical, some distinctly lageniform. 40 microns long.
Caulocystidia scarce, cylindrical, in clumps, arising from center of hypha or subterminal on swollen hyphae.
Clamps present fairly easy to find.
Pileipellius a hymeniform layer of round cells, scattered pileocystidia cylindrical, some clamped and septate.