Botanically, the pulp of litchi is actually a fleshy aril, which is developed from the special structure of the outer layer of seeds. This layer of structure is often developed from the suspensor, suspensor or placenta, and it is mostly fleshy and brightly colored, which can attract animals to eat and facilitate the spread. In some literatures, the pulp of litchi is also called aril.
The pulp of litchi is mostly white and translucent, and some are light yellow. From the botanical point of view, the pulp of litchi is not the real pulp, but a film developed outside the seed.
The above information is for your reference. If more detailed information is needed, it is recommended to consult a professional botanist or institution.