When most people venture into Maine fields and forests in the summertime, they probably see flowers, trees, ferns and glimpses of wildlife if they’re lucky. David Spahr of Washington sees all those things, too, of course, but he also sees something else: a stocked pantry, full of wild foods that are delicious, nutritious and, best of all, free. “There’s free food everywhere you look,” the 68-year-old forager, writer and educator likes to say. And a trip to a couple of spots he frequents in the town of Washington prove the truth of what he says.