Jef Taylor reprints some tips from a guy who likes driving around town looking for Agaricus bitorquis, an edible mushroom that grows well in curbs that have been raised up a bit by tree roots:
Don't run over a dog or cat or rear end a car. Drive slowly ignoring that half-wit behind you blowing his horn. Hunt one side of the street at a time for safety's sake. Season expires around the end of May. This is a delicious mushroom big time.