Summary:
{See also Hemimycena Table.} Also listed in Veined category. Features include 1) extremely small size, 2) white color, 3) cap that is minutely pubescent centrally and sometimes radially grooved, 4) gills (if present) that are residual folds not reaching the cap margin, 5) thread-like stem, 6) growth restricted to monocot debris in wet areas, and 7) microscopic characters that include elongate inamyloid spores on (1)2-spored basidia and absent clamp connections. The description is derived from Redhead(15).

Cap:
0.05-0.2cm across, convex, sometimes depressed at center, becoming flat to cyathiform [cup-shaped] or funnel-shaped; white; minutely pubescent centrally with hand lens, sometimes radially grooved when folds present on underside

Gills:
often absent but when present are residual folds not reaching margin, slightly decurrent

Stem:
0.2-1cm x 0.005-0.01cm, thread-like; white; with minute fine hairs under hand lens, often more at base, insititious or with a slightly swollen pubescent base

Microscopic spores:
spores 11-15 x 3.8-4.5 microns, elliptic to cylindric, smooth, inamyloid, thin-walled, with prominent apiculus; basidia (1-) 2 spored, 18-25 x 6-7.2 microns, clavate, simple septate; pileipellis hyphae repent, often inflated, 5-20 microns wide, densely diverticulate, simple septate, thin-walled, pileocystidia abundant on the disc, sparse elsewhere, the central ones thick-walled, narrowly acuminate, nearly setiform, colorless, often flexuous [wavy], 48-85 x 4-5 microns, inamyloid, toward the periphery tending to be branched in the apical region and with thinner walls, at times with diverticulate apex or base, cap trama hyphae smooth, otherwise similar to pellis hyphae, inamyloid, sometimes with slightly thickened walls; stipitipellis hyphae 3-10 microns diameter, sparsely diverticulate, with thin to pronounced walls, simple septate, caulocystidia abundant, scattered, similar to the central pileocystidia

Spore deposit:
[presumably white]

Notes:
Hemimycena cyphelloides is found at least in BC and Europe, (Redhead). There is a collection by G. Laursen from AK at the University of Washington labeled as this species.

EDIBILITY

Synonyms and Alternate Names:
Asterodon setigera (Peck) Peck
Helotium cyphelloides Redhead
Hydnochaete setigera Peck
Mycena cyphelloides P.D. Orton