Aizoon rigidum L.f., Suppl. Pl.: 261. 1782 ["1781"] sec. Hartmann 2017
- =Aizoon argenteum Eckl. & Zeyh., Enum. Pl. Afric. Austral. 3: 325. 1837 syn. sec. Hartmann 2017
- ≡Aizoon rigidum var. angustifolium Sond., Fl. Cap. 2: 470. 1862 syn. sec. Hartmann 2017
- =Aizoon rigidum var. villosum Adamson in J. S. African Bot. 25: 35. 1959 syn. sec. Hartmann 2017
- =Aizoon rigidum var. rigidum syn. sec. The Plant List v. 1.1 2013
- –Aizoon sericeum Fenzl ex Sond., Fl. Cap. 2: 470. 1862, nom. nud., syn. sec. Hartmann 2017