, in parietal placentation, the ovules develop on the inner wall of the ovary or on the peripheral part. The ovary is initially one-chambered but becomes two-chambered due to the formation of a false septum (e.g., mustard and Argemone). In contrast, free central involves ovules on a central axis without septa, basal involves a single ovule at the base, and axile involves ovules attached to a central axis in a multilocular ovary .