I’m a member of a foraging group for eastern region peeps, and I see a lot of posts about poke weed. From what I understand, the leaves and stems are toxic, but the berries are safe to use in jams and jellies. I am not familiar with their medicinal properties. I don’t think they grow out west, where I’m originally from. If you’re on Facebook, look up The Herbalist Community group, and also Foraging for Wild Plants & Mushrooms. I’ve been learning a lot about plants unique to this side (east and southeast) of the country.