Research and Conservation in Southern Sonora, Mexico
 Ferocactus pottsii (biznaga)
    
        
        Ferocactus pottsii in tropical deciduous forest in Choquincahui, Sonora. Photo: Mark Dimmitt  | 
        
        Ferocactus pottsii  in oak woodland, Rancho Santa Bárbara northeast of Alamos, Sonora. Photo: Martín G. Figueroa  | 
    
    
        
        Ferocactus pottsii flowering in cultivation. Photo: T.R. Van Devender  | 
        |