I would like to point out there is a group on FB called Oklahoma Wildcrafting. It is related to this website where you can get info on edible plants. The thing about this group is they are very ethical and safety concious. I would recomend checking it out and working with someone knowledgable before foraging.

I'm all for such a thread, in which I would include plantain, yarrow, purslane, lambsquarters and chickweed. But I'm a newby. I purchased seeds for plantain because I could not decide if I was seeing the right weed. I grow golden purslane, a domesticated purslane and love it. Jewels of Opar, most often grown for flowers is edible and grows in August. It is a relative of purslane. The leaves aren't as thick. An acceptable summer salad ingredient. Buckshorn plantain makes a crunchy winter salad ingredient, though the skinny leaves need something else with it. My husband is on blood thinners. A small cut bleeds a long time. Macerated yarrow will stop the bleading. I fed chickweed to the chicks, not realizing it was edible.

I didn't know we had soap nut trees in Oklanoma, but we do. People buy them from India when they grow here. I hope to find one someday. Here's an article from Texas about them.