Collected
June 1993.
Sonora, Mexico
Locality: Douglas, AZ border crossing, S to Esqueda (ca. 60 mi.) then E through mountains to La Playa (docking area) of Presa Angostura.
Environment description: Plants 1-2 m tall, growing on hills with Ambrosia sp., Fouquieria splendens, Opuntia spp., Stenocereus thruberi.