Echinocactus joadii Hook.f. in Bot. Mag. 112: t. 6867. 1886
Echinocactus joadii in Bot. Mag. 112: t. 6867. 1886
is basionym for Echinocactus concinnus var. joadii in Anales Mus. Nac. Montevideo 5: 204. 1905
is basionym for Notocactus joadii in Revista Sudamer. Bot. 7: 216. 1943
is basionym for Notocactus concinnus f. joadii, Kaktusz Világ 18(4): 75. 1989 ["1988"]