Caulorhiza umbonata (Peck) Lennox
Yes, I think you're right. It just got ID'd as such on Mushroom Observer. I was thrown by the appearance of the cap.
Verbatim Date: Wed Dec 21 2016 12:59:38 GMT-0800 (PST)
United States, California, 1381 Branciforte Dr, Santa Cruz, CA, US
Cross posted on Mushroom Observer: http://mushroomobserver.org/265027?q=19Pj
Rights Holder: © held by the observer (listed as 'Collector') at iNaturalist.org, with some rights reserved (CC BY-SA)
Record Id: a90558c6-ada7-4578-9066-f0aeefd276b5