The dark color appeared due to pressure applied to it, and it was very soft to the touch. Found growing on a dead log.
Pileus 6.5-9 cm broad, convex to plane with an obscure umbo, (5C-D6,5,4) on disc, more yellowish toward margin (4B5,4), appressed radially fibrillose, dry, with white veil at margin breaking from stipe wih maturity. Lamellae white, adnexed, brusing a bit to pale brown, with even edges. Stipe 6-7 cm long, 2-2.5 cm broad, tapered downward, dry, with peronate veil, pale brown on white ground, appressed fibrillose becoming subsquamulose. Flesh white throughout, unchanging with mild to pleasantly pungent odor and mild taste.
Growing on Gambel Oak
Maybe??