Collection location: Los Trancos Preserve, Palo Alto, California, USA [Click for map]
I must have found these more in the past, but just dismissed them as R. cremoricolor. But the taste of these is mild, also the caps of these is more yellow then creamy. The gills on these are very thick, and widely spaced. It was easy to see in the one which is facing away from the camera (sorry), but the gills are different than the R. cremoricolor, which are thin, even, and close.
So, I guess if I keep and eye out for these, and not be so dismissive as just another cremoricolor, I might find more of these.