Collection location: Howarth Park, Santa Rosa, Sonoma Co., California, USA [Click for map]
I’m not sure about this identification. The edges are serrated, which doesn’t show well in the photo.
May 5: Well, the spores are clearly brown.
Would the C. crocophyllus become this light as it aged or do I assume it’s C. mollis?
May 6: C. mollis it is!