The arrangement of ovules attached to the sides of a syncarpous ovary with a single chamber is referred to as

The arrangement of ovules attached to the sides of a syncarpous ovary with a single chamber is referred to as parietal placentation. In parietal placentation, the ovules are attached to the inner wall, or parietal tissue, of the ovary, forming a line or several lines along the edges of the ovary chamber. This is in contrast to axile placentation, where the ovules are attached to a central axis in the ovary, or free-central placentation, where the ovules are attached to a central column in a free-standing manner. Parietal placentation is commonly found in plants with syncarpous ovaries, such as the tomato and the apple, and is thought to be an adaptation that allows for efficient use of space within the ovary while still ensuring adequate attachment and nourishment of the developing ovules.