06 October 1993.
Guanajuato, Mexico
Locality: Road edge, ca. 0.8 km SW inters. road to Guanajuato from Presa Allende. Unimproved road. Extends to below collection site for Ames 21537. Near Canada de La Virgen. Habitat: Rocky. Assoc. with Gomphrena, Tagetes, Acacia, Zinnia peruviana..
Coordinates: 20.8833, -100.8500
(Map it)
Elevation: 2050m.
Comment: Plants moderate, scattered.