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What does the hilum scar show on a seed?
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Seed
Fruit and seeds of the southern magnolia (Magnolia grandiflora). The fruit is an aggregate of follicles, and each follicle bears a single red seed.
The hilum is a small scar on a seed that marks its former point of attachment to the ovary wall.12
During development, an ovule is attached to the placenta inside the fruit by a short stalk known as the funiculus. Once the seed matures and is liberated from the plant, the connection point where the funiculus was attached remains visible as the hilum. In some seeds, a short ridge called the raphe may also be present, which is formed by the fusion of the seed stalk and the seed coat.32