HathiTrust is a repository of out-of-copyright digitized books and other documents. This resource will be especially helpful for this assignment when searching for historical cultural information about your tree species and its distribution in European forests.
When you get to the search page, use the yellow box to log in to Auburn University as an institutional member (this is an extra login after you log in through AU Libraries' website).
Try searching both the Catalog and Full-text. You will obtain very different results and both can be helpful!
Remember your operators and be sure to capitalize them!
Use quotes if you want to search an "exact phrase"
Make use of the limiters on the left side of the screen - language, date, format, etc.
Once you find a document, you can search within the document for specific keywords to quickly determine if it suits your needs.