DENDROLOGY

Detailed explanation-1: -In free central placentation, ovules are borne around a central column, which is not connected with the ovary wall by any septum. e.g. Dianthus. Brassica and Argemone have parietal placentation while citrus has axile placentation.

Detailed explanation-2: -In free central placentation, ovary is unilocular and ovules are borne on the axis in the center of the ovary and septa are absent. It is seen in Dianthus.

Detailed explanation-3: -Free central placentation can be seen in Dianthus, Primrose.

Detailed explanation-4: -Free central placentation is present in single chambered ovary with ovules borne on the central axis. Brassica and Argemone (parietal placentation), Citrus (axile placentation), Dianthus (free central).