14 October 1983.
Coahuila de Zaragoza, Mexico
Locality: Road from Saltillo towards E, between Jame and Cienega de la Purisima, at the highest part of the road.
Coordinates: 25.2000, -100.0667
(Map it)
Elevation: 2720m.
Environment description: At roadside, protected by very spiny shrubs.