Echinopsis thionantha (Speg.) Werderm. in Notizbl. Bot. Gart. Berlin-Dahlem 11: 264. 1931
Echinopsis thionantha in Notizbl. Bot. Gart. Berlin-Dahlem 11: 264. 1931
is new combination for Echinocactus thionanthus in Anales Mus. Nac. Buenos Aires, ser. 3, 4: 499. 1905