Ceratiomyxa fruticulosa is a slime mold which grows on dead wood. It has been documented from Joaquin Miller Park.

 

Ceratiomyxa fruticulosa by Alan RockefellerCeratiomyxa fruticulosa by Alan RockefellerCeratiomyxa fruticulosa by Alan RockefellerCeratiomyxa fruticulosa spores 1000x by Alan Rockefeller