Fall is usually the best time of the year to gather the most. What's availble in  

your area right now?

Chokecherries, sumac, Queen Ann's Lace (Wild Carrot) seeds, some blackberries in shady places, some late blueberries, dandelion roots, Jerusalem artichokes, Motherwart, some mints, apples, onions, acorns, currents, grapes, pine nuts (well almost here for them), I'm trying to think of others. Miles away from here, cranberries are available, but not at my house or anywhere near me.