Mesembryanthemum opticum Marloth in Trans. Roy. Soc. South Africa 1: 405. 1910
Mesembryanthemum opticum in Trans. Roy. Soc. South Africa 1: 405. 1910
is basionym for Lithops optica in Gard. Chron., ser. 3, 71: 80. 1922
Mesembryanthemum opticum in Trans. Roy. Soc. South Africa 1: 405. 1910
Taxon for this name