Photo: Diane Edwardson, February 15, 2015. The mushroom caps start off vibrant yellow when they first sprout, then fade to beige & eventually, shrivel into a leathery brown. The largest of these mushrooms was about 3" in diameter. No, I have no idea what they are, other than some form of "gilled mushroom."
Click here for all the mushrooms we've documented in the neighborhood.
Disclaimer: The Corralitas Red Car Property Blog prefers to quote reliable sources, such as CalFlora and California Poison Control on the issue of toxicity. MykoWeb is the resource everyone seems to refer to for mushrooms. The Los Angeles Mycological Society has a recommended reading list.