Neat site hosted by Dearborn College. Honestly I had never encountered the word 'ethnobotany' before.

Site advertises "A Database of Foods, Drugs, Dyes and Fibers of Native American Peoples, Derived from Plants."

http://herb.umd.umich.edu/



I tossed in a couple different Alaskan plants (common names) and received some interesting info. YMMV