Summary:
Features include 1) a moist, striate cap that is olive to olive brown soon becoming pale dull orange from the margin inwards, 2) orange gills that do not fade, 3) a dry "grape green" stem, and 4) growth on rotten conifer wood.

Gills:
ascending adnate, with decurrent tooth, close to subdistant, 20-30 reaching stem, broad (about 0.5cm broad), 2 tiers subgills; "ochraceous orange", scarcely fading, (Hesler), ''ascending adnate, close to subdistant, broad; dark yellowy orange'', (Phillips), adnate, broad; bright orange, not fading or changing color when old, (Stuntz)

Stem:
3-5cm x 0.2-0.4cm, equal, soon hollow, very fragile; "grape green" becoming pallid greenish yellow; bald, (Hesler), 3-5cm x 0.2-1cm, ''very fragile becoming hollow; yellowy green becoming paler; smooth'', (Phillips), 3.8-5.7cm x 0.3-0.6cm, fragile; ''bright yellow-green, becoming pallid yellow tinged with green''; moist, not viscid, smooth, satiny, (Stuntz)

Veil:
absent

Odor:
mild (Hesler, Phillips, Stuntz)

Taste:
mild (Hesler, Phillips, Stuntz)

Microscopic spores:
spores 6.5-8 x 4-5 microns, subelliptic, colorless in Melzer''s reagent (inamyloid); basidia 4-spored, 38-50 x 7-9 microns; pleurocystidia and cheilocystidia none; gill tissue subparallel, hyphae 7-16 microns broad; cap cuticle "at first of repent non-gelatinous hyphae, a cutis", "finally the hyphae loosening and at times more or less erect and then forming a trichodermium"; hypodermium none; cap trama radial hyphae; clamp connections none, (Hesler), spores 6.5-8 x 4-6 microns, subelliptic, inamyloid, (Phillips)

Spore deposit:
white (Phillips)

Notes:
Hesler(1) examined collections from WA, MA, ME, and MI. It has also been reported from BC (Kroeger(3)).

EDIBILITY

unknown (Phillips)

Synonyms and Alternate Names:
Hygrophorus marginatus Peck var. olivaceus A.H. Sm. & Hesler