29 August 1995.
Hidalgo, Mexico
Locality: Slopes of Cerro Chulco, 3-5 km S of Apan along the Calpulalpan (Tlaxcala) - Apan (Hidalgo) road just N of Colonia Los Valadores.
Elevation: 2000m.
Environment description: W-facing slopes and ledges of a small mountain now heavily grazed and farmed.
Collector(s):