Portulaca grandiflora Hook. in Bot. Mag. 56: t. 2885. 1829 sec. Tebbs & Klitgaard 2009
- =Portulaca mendocinensis Gillies ex Hook., Bot. Misc. 3: 331?. 1833 syn. sec. Tebbs & Klitgaard 2009
- =Portulaca hilaireana G. Don, Gen. Hist. 3: 74. 1834 syn. sec. Tebbs & Klitgaard 2009
- =Portulaca megalantha Steud., Nomencl. Bot. (ed. 2) 2(2): 383. 1840, nom. illeg. syn. sec. Tebbs & Klitgaard 2009
- =Portulaca caryophylloides hort. ex Vilm., Fl. Pleine Terre (ed. 2): 722. 1866 syn. sec. Tebbs & Klitgaard 2009
- =Portulaca gilliesii Speg. in Physis (Buenos Aires) 3: 172. 1917, nom. illeg. syn. sec. Tebbs & Klitgaard 2009
- =Portulaca immersostellulata Poelln. in Repert. Spec. Nov. Regni Veg. 33(8–17): 161. 1933 syn. sec. Tebbs & Klitgaard 2009
- =Portulaca multistaminata Poelln. in Revista Sudamer. Bot. 7(2/4): 71–72. 1942 syn. sec. Tebbs & Klitgaard 2009