Echinopsis ×muelleri Hirscht in Cact. J. (London) 2: 6. 1899 Echinopsis ×muelleri Hirscht in Cact. J. (London) 2: 6. 1899Taxon for this nameEchinopsis ×muelleri Hirscht in Cact. J. (London) 2: 6. 1899
