Free central placentation examples?

Free central placentation examples?

• A. Dianthus
• B. Sunflower
• C. Dianthus, Primrose
• D. Mustard, Argemone

Answer: (C)

Free central placentation occurs when a central column of placental tissue bears the ovules inside a multilocular ovary, and this central placenta is not attached to the walls. The ovules are arranged around that central axis rather than along the walls. This pattern is classic for the genera Dianthus and Primrose, where you can picture a central placenta with ovules radiating around it inside the ovary. The other listed plants typically show different patterns, such as placentation along the inner walls (parietal) or along the locule axis (axile), so they don’t exhibit the free central arrangement.

Free central placentation occurs when a central column of placental tissue bears the ovules inside a multilocular ovary, and this central placenta is not attached to the walls. The ovules are arranged around that central axis rather than along the walls. This pattern is classic for the genera Dianthus and Primrose, where you can picture a central placenta with ovules radiating around it inside the ovary. The other listed plants typically show different patterns, such as placentation along the inner walls (parietal) or along the locule axis (axile), so they don’t exhibit the free central arrangement.