Mexico, Sonora, Arroyo Cajon del Diablo, nowthwestern Sierra San Luis, 3.7 km south of MEX 2 (at 80 km east of Agua Prieta), ca. 67.7 km (by air) east of Agua Prieta, Cuenca Los Ojos Conservation Area.
31.288611 -108.796944
31d 17m 19s N; 108d 47m 49s W
1772 meters (5812ft)
Cupressus-Acer-Quercus canyon forest.
Uncommon herbaceous perennial in canyon bottom; flowers purple.