Lithops optica (Marloth) N.E.Br. in Gard. Chron., ser. 3, 71: 80. 1922
Lithops optica in Gard. Chron., ser. 3, 71: 80. 1922
is new combination for Mesembryanthemum opticum in Trans. Roy. Soc. South Africa 1: 405. 1910
Lithops optica in Gard. Chron., ser. 3, 71: 80. 1922