Raphe is a part of seed.. it is a ridge portion between hilum and micropyle..

Raphe is a term used to describe a ridge formed by the funiculus. In the context of botany, the funiculus is a stalk-like structure that connects the ovule to the placenta of the flower. The raphe is specifically the ridge formed by the funiculus along one side of the ovule.

Here is a detailed explanation of the answer:

- The funiculus is the part of the flower that attaches the ovule to the placenta. It acts as a conduit, providing nutrients and water to the developing ovule.
- The ovule is the structure within the flower that contains the female reproductive cells, including the egg. It is the precursor to the seed.
- The raphe is a ridge-like structure that is formed by the funiculus along one side of the ovule. It serves as an attachment point for the seed coat or testa.
- The raphe is important for the development and maturation of the seed. It helps to anchor the seed coat to the ovule and ensures proper alignment of the embryo within the seed.
- The presence of the raphe can vary depending on the plant species. In some plants, the raphe may be more prominent and well-defined, while in others it may be less noticeable.

In summary, the raphe is a ridge formed by the funiculus along one side of the ovule. It plays a crucial role in the development and maturation of the seed. This knowledge is important in the field of botany, particularly in the study of plant reproduction and seed development.