Cap 0.4-1.7 cm broad, convex, expanding to nearly plane and slightly depressed; surface smooth to faintly wrinkled, pallid brown at the disc shading to a pale pinkish, striate margin; flesh thin and white.
Gills adnate to adnexed, close, white to pinkish-tan.
Stipe 1.5-4.5 cm tall, 0.1-0.2 cm broad, white, subtomentose above, yellowish-brown and pubescent below, orange-brown mycelium at the base; veil absent.
Spores 3.5-6 x 2-3 µm, elliptical, smooth, nonamyloid. Spore print white.
Solitary to grouped on decaying Douglas fir cones; from late summer in areas of fog drip to mid-winter.
Unknown. Too small to be of any culinary value.
Strobilurus trullisatus is one of relatively small number of mushrooms in our area that live on conifer cones. It is recognized by a pale-colored cap with pinkish tones, and a yellowish-brown stipe base. Baeospora myosura also grows on Douglas fir cones, but has a somewhat darker cap, much closer gills, and a distinctly hairy stipe base. A related species, Strobilurus occidentalis, occurs on spruce cones. Strobilurus kemptonae is an older name for this mushroom.