Echinocactus horizonthalonius var. nicholii L. Benson  
Family: Cactaceae
Nichol's echinocactus,  more...
[Echinocactus horizonthalonius subsp. nicholii]
Images
not available
Echinocactus horizonthalonius var. nicholii
The National Science Foundation
This project made possible by National Science Foundation Award 1410069