As classified in WFO snapshot
December 2022
Warning: older classification
variety
Echinocactus concinnus var. joadii
(Hook.f.) Arechav.
This variety name was first published in in Anales Mus. Nac. Montevideo 5: 204. 1905.
This variety name has been reclassified since this snapshot. Its current preferred usage is a synonym .