Wilderness / Survival Food 1. Acorn from Oak: The entire nut is edible and they're easy to stockpile. 2. Pine: The nuts and inner bark of the tree are edible. You can also make pine needle tea. 3. Cattail: This is one of best options out there. The base stalk is like celery, the root and tuber can make flour, and the pollen is very healthy. 4. Grass The corm (aka the base) is starchy, but edible and filled with water and carbohydrates.