Summary:
{See also Dark Omphalinoid Arrhenia Table} Features include small size, a flat, hygrophanous, dark brown cap with a margin that is striate when moist and scalloped when old, gray-brown gills, an equal stem colored as the cap, and mild odor and taste. The description is derived from Bigelow(5).

Cap:
0.5-1.6(3)cm across, convex with slightly depressed disc at first, margin appressed against stem then +/- incurved to decurved [downcurved], expanding to broadly convex or sometimes flat, "disc usually only narrowly and shallowly depressed"; hygrophanous, dark brown when moist ("bister", "mummy brown"), margin becoming somewhat paler when expanded, fading overall to brownish gray ("drab"); appearing bald or disc fibrillose, margin striate when moist, crenate [scalloped] when old

Flesh:
very thin, "soft and watery to pliant"; colored as cap surface

Gills:
broadly adnate then decurrent, distant, broad (about 0.3cm); grayish brown or brownish gray ("drab", "hair brown", "wood brown"); edges even, at times darker than faces

Stem:
1-2.5(3.5)cm x 0.05-0.1(0.2)cm, equal, "watery, fragile or pliant, stuffed"; colored as cap; unpolished, bald or sometimes pruinose to short pubescent [with short fine hairs]

Veil:
[presumably absent]

Odor:
not distinctive or rarely faintly fragrant

Taste:
not distinctive

Microscopic spores:
spores 7.5-10 x 5-6.5 microns, elliptic to broadly elliptic, smooth, inamyloid; basidia usually 4-spored but occasionally 2-spored, 18-28 x 5-6.5 microns; [pleurocystidia and cheilocystidia presumably absent]; clamp connections present

Notes:
Bigelow examined collections from BC, WA, ID, AK, MA, ME, and UT.

EDIBILITY

Synonyms and Alternate Names:
Omphalina hohensis "(A.H. Sm.) Norvell, Redhead & Ammirati"