Mexico, Sonora, Fronteras, 380m SW of El Asseradero Camp (30.72678, -109.82099), 24.0 km (by air) WSW of Fronteras, Sierra Buenos Aires, Ajos-Bavispe Reserva Forestal Nacional y Refugio de Fauna Silvestre.
30.72383 -109.82301 +-15m. WGS84
1700-1800 meters
1700-1800 m
Oak to Pine-oak woodland.
Rocky-gravelly soils derived from decomposing granitoid rock.