Collection location: Albion, Mendocino Co., California, USA [Click for map]
The light color and pale gills make this one different than H. fasciculare, which was also found over the weekend, but I have enough photos of that one.
The two on the right in the photo are older, and the furthest right, with the blackish stain, that is a spore print.
One thing that I think I heard in the talk over the weekend about wood rotters, is that this is one of the few species that can rot redwood. So, if you find it on redwood, it will be this species, and not H. fasciculare. (If I understood it correctly, and remember right…)