Echinocactus johnsonii var. octocentrus J.M.Coult. in Contr. U.S. Natl. Herb. 3: 374. 1896
Echinocactus johnsonii var. octocentrus in Contr. U.S. Natl. Herb. 3: 374. 1896
is basionym for Echinocactus johnsonii subsp. octocentrus in Kalmia 12: 20. 1982