A Depression-Era Medicinal Plant Map of the United States

By Rebecca Onion

 

Cannabis sativa is on the left-hand side. If you go to the following link and click on the map, a big zoomable map will come up.

http://www.slate.com/blogs/the_vault/2015/05/13/history_of_medicinal_plants_map_of_the_plants_in_the_united_states_from.html