One ounce of acorn nut meat from any species of Oak (Quercus genus) contains a little over 100 calories. These are high carb nuts, with some fat and protein, giving these nuts a nutritional profile similar to bread. Just shell them and soak them in water for a few days to remove their bitterness.
7. Wild Rice**
This northern marsh grass plant has long been a valuable commodity in North America. The raw, uncooked rice is 100 calories per ounce, and it contains some traces of B vitamins, 4 grams of protein, and numerous minerals.
These small shiny black seeds contain 90 calories an ounce, 3 grams of protein, and some calcium and iron. The leaves are also edible, but have very low nutritional value.