Mexico, Sonora, Bacoachi, Sierra la Púrica, 19.8 km (by air) NNW of Nacozari de García
30.54922 -109.75122
2381 meters (7810ft)
Cited in S.G. Weller, C.A. Domínguez, F.E. Molina-Freaner, J. Fornoni, and G. LeBuhn. 2007. The evolution of distyly from tristyly in Oxalia alpina (Oaxalidaceae) in the Sky Islands of the Sonoran desert. Am. J. Bot. 94:972-985.; pine-oak forest