Robuta

https://www.huntington.org/collections/bot-121944 Ferocactus robustus | Collections | The Huntington ferocactus robustus the huntington collections https://tropical.theferns.info/viewtropical.php?id=Ferocactus+robustus Ferocactus robustus - Useful Tropical Plants ferocactus robustus tropical plants useful https://starr-nursery.com/?attachment_id=22613 Ferocactus robustus 05 - Starr Nursery Starr Nursery ferocactus robustus starr nursery