Edible wild plants are a great source of nutrition and they are free! Foraging for healthy food is fun and it costs nothing. To help identify many wild edibles check out these links:
https://www.ediblewildfood.com/edible-weeds.aspx
https://www.ediblewildfood.com/edible-fungi.aspx
https://www.ediblewildfood.com/edible-aquatic-plants.aspx
https://www.ediblewildfood.com/edible-trees-shrubs.aspx
Check out the many recipes too! https://www.ediblewildfood.com/wild-food-recipes.aspx