Tree Identification References

Plants of Arizona, 2nd ed.. Epple, Anne Orth. Falcon Guides, 2012.

The Sibley Guide to Trees. Sibley, David Allen. Knopf, 2009.

Western Trees. Petrides, George A. and Petrides, Olivia. Houghton Mifflin, 1998.

Note: The above books differ slightly on tree names and taxonomy.