Plants -- Mexico -- Mayo River Valley
See also what's at your library, or elsewhere.
Broader terms:![[Info]](https://onlinebooks.library.upenn.edu/info.gif)
Rio Mayo Plants: A Study of the Flora and Vegetation of the Valley of the Rio Mayo, Sonora (Carnegie Institution of Washington publication #527; 1942), by Howard Scott Gentry (multiple formats at archive.org)
Items below (if any) are from related and broader terms.