Echinocactus texensis Hopffer  
Family: Cactaceae
horse crippler,  more...
[Homalocephala texensis Britton & Rose]
Echinocactus texensis image
Patrick Alexander  
Echinocactus texensis
Echinocactus texensis image
Patrick Alexander  
The National Science Foundation
This project made possible by National Science Foundation Award 1410069