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USNM Number: 3072077

Collection Number: 1

Collection Date: 1978-09-12 single date

Collectors: Iltis, H. H.; Lasseigne, A.

Country: MX

State/Province:

Territory: Coahuila

County:

Precise Locality: Level plains of the Rio Grande Valley, just N of Rio Escondido, 18 km SSW of Piedras Negras on Mexico #57.

Latitude:

Longitude:

Elevation: 300 meters

Cultivated: