Portulaca umbraticola Kunth, Nov. Gen. Sp. 6: 72. 1823 sec. Tebbs & Klitgaard 2009
- =Portulaca lanceolata Haw., Misc. Nat.: 142-143. 1803, nom. illeg. syn. sec. Tebbs & Klitgaard 2009
- =Portulaca coronata Small in Bull. Torrey Bot. Club 23(4): 126–127. 1896 syn. sec. Tebbs & Klitgaard 2009
- =Portulaca planooperculata Kuntze, Revis. Gen. Pl. 3: 16. 1898 syn. sec. Tebbs & Klitgaard 2009
- =Portulaca denudata Poelln. in Repert. Spec. Nov. Regni Veg. 33: 159. 1933 syn. sec. Tebbs & Klitgaard 2009