Mexico, Sonora, Agua Prieta Municipio, Ca. 2 km west of Rancho San Bernardino main gate paralelling MEX 2 (ca. 21 km east of the eastern edge of Agua Prieta/
31.316667 -109.266667
1145 metros (3756pies)
Larrea-Prosopis desertscrub.
Locally uncommon subshrub in disturbed soil; flowers yellow.