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• Axile placentation occurs when the placenta is axial and ovules are attached to it in a multilocular ovary, as seen in China rose, tomato, and lemon .
• Parietal placentation involves ovules developing on the inner wall of the ovary or peripheral part, as seen in Mustard and Argemone .
• Free central placentation occurs when ovules are borne on a central axis and septa are absent, as seen in Dianthus and Primrose .
• Basal placentation involves the placenta developing at the base of the ovary with a single ovule attached, as seen in Sunflower and Marigold .