Here are 15 of the most common fungi you'll find growing on the trees in your yard, what it really means when mushrooms start ...

FIRST: A WORD OF CAUTION. Know first what you definitely don’t want, and then what you are looking for. DO NOT try to identify any mushrooms based on this article or any pictures you see on the web.

Local ecologist Tom Hofstra will discuss “Fungi of the Central Sierra” at a program presented by the Tuolumne Group of the Sierra Club.