Collection location: Los Trancos Preserve, Palo Alto, Santa Clara Co., California, USA [Click for map]
Found under live oak. No clear odor.
The first micro-shot is of the cap surface at 1000x in KOH. The surface hyphae are long, smooth, with light intercellular pigments, clamp. con. were obs.
The second micro-shot is of spores from the gill at 1000x in KOH. The spores are angular, 5-7 sided. The ave. apr. size is 8 × 7 um.
I looked up things in Funga Nordica, with the Nordeloos key there, and in the “Entolomatoid Fungi of Western US” by Largent, and I’m always surprised how they can divide up so many species with so little to obs. These don’t have any clear odor, fairly bland macro-scopically. There are no cystidia, the cap surface is a plain cutis, no incrustations, rather boring. And spores are normal Entoloma type spores. And that little to work with, you still bounce around a key with dozens of different species…
Anyway, these come out pretty well as E. rhodopolium in both sources. In Largent he adds more details on how to get to this, adding that the pileus should be about 6mm thick, at least than a cm. So, this id looks rather ok in the end.
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