I find a bunch of these each year in the Preserve, but only around live oak. There are a few d. fir in the preserve, but they are kinda rare, probably only 10 in the whole preserve, in one spot is there 5 close together, and I don’t find these there.
I’ve only ever seen this in coastal CA usually at the Santa Cruz fair. I’m pretty sure the photo in The Agaricales of California (Tricholoma) is from the Santa Cruz fair, but we didn’t have complete collection info for it. It’s listed as growing “with conifers, September to December, Santa Cruz County northwards in coastal forests, and in the Sierra Nevada”. From the looks of Doug’s collection I’d say it also occurs with live oak. Doug- Any conifers in the area?
I concur with the id. Surprising to see this one on the Coast. I see this Tricholoma in Sierra Nevada frequently.