This seems like it should be a Peniophora based on the SV+ gloeocystidia, and the impressive lamprocystida However, I could not find clamps and the spores are small (5.4-6.2 X 2.8-3.1)l for at least the European clampless species. Basidia are long and thin (34 X4) with no clamp that I could find at the bottom, but I never got an ideal view because the hymenium was too tough to squish and too rubbery to cut thinly. This may improve after drying. The gray velvety look of the hymenium is caused by the cystidia, and this is apparently common in Peniophora. Some of the lamprocystidia were over 100 um in length. It was fruiting on the bark of a downed white fir or sugar pine log.