United States, Arizona, Pima County, Collected above the West Branch arroyo about 500 feet south of Silverlake Road. West Branch of the Santa Cruz River.
32.208333 -110.983333 +-15000m.
In the shade of the mesquite canopy
Initially carpeting the ground with cotyledons in July. Corolla lobes dark pink, the tube white
Populations scattered, locally abundant where they occur