09 September 1983.
Querétaro, Mexico
Locality: From Hwy 120, Cadereyta to Jalpan, about 19 km E towards San Joaquin, then about 5 km along track to El Doctor.
Coordinates: 20.9667, -99.6500
(Map it)
Elevation: 2560m.
Environment description: Mountainous oak-pine forest. Open plant community in red soil on a slope.
Collector(s):