Everyone should be learning about their native plants... EVERY part of this earth is covered with native medicinal plants...
We do not need goji's the answer is in our back yards. What plants are native to your areas? What grows wild? What bears fruit. Food is everywhere, not just the grocery store. I lived for almost four months in the high desert living off the land 30 years ago. It is not difficult at all.
Hope it does not come to that and a garden of herbs, vegetables and fruit along with fruit trees remain legal...