Ecologic Survey of the Durango Grasslands. Allan Hancock Foundation Expedition. Cienega bottomland near small lake 40 miles north of Ciudad Durango. Cienega bottomland in Grama Grassland., Durango, Mexico, North America
Ecologic Survey of the Grama Grasslands. Allan Hancock Foundation Expedition. Eastern piedmont of Sierra Gamon above Penon Blanco. Grama Grassland near upper limits of Shrub., Durango, Mexico, North America
Ecologic Survey of the Grama Grasslands. Allan Hancock Foundation Expedition. 5 miles southwest of Guadelupe Victoria near highway., Durango, Mexico, North America
Ecologic Survey of the Grama Grasslands. Allan Hancock Foundation Expedition. Among cerros 6 miles southwest of Carboneras, Llano de Zaragosa., Zacatecas, Mexico, North America