Gymnocactus viereckii subsp. major (Glass & R.A.Foster) Doweld in Sukkulenty 3: 37. 2000
Gymnocactus viereckii subsp. major in Sukkulenty 3: 37. 2000
is new combination for Gymnocactus viereckii var. major in Cact. Succ. J. (Los Angeles) 50: 285. 1978