Agave cupreata (Asparagaceae), is found only on mountain slopes of the Rio Balsas basin in the Mexican states of Michoacán and Guerrero at elevations of 1,200-1,800 meters.
Agave shrevei is a member of the family Asparagaceae, indigenous to the Sierra Madre Occidental in Mexico, along the boundary between the states of Chihuahua and Sonora.
Dasylirion durangense, common name "sotol," is a perennial plant in the family Asparagaceae, native to Durango, Chihuahua and Sonora, Mexico.