Cotyledon horizontalis Guss., Ind. Sem. Horto Boccad. 1826: 4. 1826

is basionym for Umbilicus horizontalis (Guss.) DC., Prodr. 3: 400. 1828

is basionym for Cotyledon umbilicus-veneris subsp. horizontalis (Guss.) Batt. in Battandier & Trabut, Fl. Algérie 1: 329. 1889

Taxon for this name