Cycas circinalis subsp. papuana (F. Muell.) R. M. Schust.
Homotypic synonym selon GBIF classification (Originally found in sources as accepted taxon within Cycas circinalis L.)
Cycas circinalis subsp. riuminiana (Porte ex Regel) J. Schust.
Proparte synonym selon GBIF classification (Originally found in sources as proparte synonym of Cycas edentata de Laub.) and GBIF classification (Originally found in sources as proparte synonym of Cycas edentata de Laub.)