15 October 1982.
México, Mexico
Locality: About 6.5 km towards San Pedro Tenayac from junction with Temascaltepec-Valle de Bravo road.
Elevation: 1860m.
Environment description: Alongside an arroyo, in organic soil against larg rock. Among rich herbaceous vegetation in moist habitat, in area with Quercus, Pinus and guayaba, with low shrubs under trees.
Collector(s):