A kind of mushroom
Meadow Mushroom (Agaricus campestris), Oakland, California. The maggotts beat me to them this year.
Russula, Myakkahatchee Creek Environmental Park, North Port, Florida
Shippensburg, PA March 2, 2013
AKA Rosy Russula
I am pretty sure this is a very late-rising springtime Amanita (Amanita velosa). It had remnants of a volva around its base in the soil.