As part of the ongoing study some genera Caryophyllaceae and preparation their treatments for new edition Flora Argentina, notes about members this family are presented. Two species (Petrorhagia prolifera Scleranthus polycarpos) reported first time Argentina. Sixteen names here lectotypified: Arenaria achalensis, A. alsinoides, andicola, bisculca, lanuginosa var. diffusa, ensifolia, megalantha,...