Collection location: Pipi Valley, El Dorado Co., California, USA [Click for map]
Found when someone was putting up his tent, and these were in the way. People thought they were A. albolutescens buttons. But cutting them open you can see the veil is much thicker at the stipe then at the cap margin. Plus the veil is splitting radially, which fits the discriptions for this species. It is one of the Cort. species where the cortina is permanent.
From the photos and comments on MykoWeb, these look more like C. magnivelatus, instead of the first id of C. verrucisporus that I got from Arora. The photos in Arora were black and white, so I can’t put to much store in those I guess.