Recommendation: We found specialized collections that might help you.
Native American Tribal Histories - Complete records (1813-1880) of the Bureau of Indian Affairs superintendents, containing all the manuscript letters and reports that the superintendents sent to Washington, D.C., as well as the responses and instructions received from the nation’s capital.
Native American Ethnobotany Database - Database of plants used as drugs, foods, dyes, fibers, and more, by native and First Peoples of North America; resource for the study of the traditional knowledge and customs of Native Americans concerning plants and their medical, religious, and other uses.