Distribution: Conifer forest along the Pacific Coast Known to be from Europe as well

Spores: ellipsoid, 7--9 x 4--5 µm, smooth and amyloid, and the cheilocystidia are club-shaped with numerous short projections, somewhat like a mace

Conservation Status: Not of concern

Mycena aurantiomarginata is a distinctively colored species that occurs widely in conifer forests along the Pacific Coast. The cap is dark olive brown with smoky tints and orangeish shades near the margin. It is not markedly hygrophanous. The gills are pallid to grayish orange on their faces and have bright orange edges. The stipe is colored somewhat like the cap. The spores are ellipsoid, 7--9 x 4--5 µm, smooth and amyloid, and the cheilocystidia are club-shaped with numerous short projections, somewhat like a mace. Mycena aurantiomarginata also is known from Europe.