12 September 1983.
Nuevo León, Mexico
Locality: From Doctor Arroyo to Galeana road, about 35 km NE along track to Zaragoza, just beyond Puerto el Pino.
Coordinates: 23.9667, -99.7667
(Map it)
Elevation: 2600m.
Environment description: On slope near head of a barranca in mountains. Oak forest, with open plant community in very rocky, light brown soil.
Collector(s):