Young, Kay. (1993). Wild Seasons: Gathering and Cooking Wild Plants of the Great Plains. Lincoln, NE: University of Nebraska Press. http://www.amazon.com/Wild-Seasons-Gathering-Cooking-Plants/dp/0803299044
This excellent cookbook gives descriptions and pictures of plants, habitats and cautions for collecting as well as recipes. I just made Wild Persimmon Bars (page 280-281). As is typical of our custom, I cut the amount of sugar to 1/3 and I used Pamela's Gluten Free Bread Mix. The Bars are rapidly disappearing. I wonder how many will be there in the morning?