06 September 1983.
Hidalgo, Mexico
Locality: Hwy 85, Zimapan to Tamzunchale, at Las Trancas, about 8 km E at Jaguey on the track to Nicolas Flores.
Coordinates: 21.0000, -99.1333
(Map it)
Elevation: 2400m.
Environment description: Roadside, and along a rock wall in an exposed, relatively level area; medium brown soil.