👉 Tetraopidion is a genus of flowering plants in the family Apocynaceae, which includes more than 60 species native to South America and parts of Africa. They are known for their unique reproductive structures that include a single ovule surrounded by a sac called an ovary. The flowers typically have five petals with white or pinkish centers. These plants are often used in ornamental horticulture due to their striking appearance and beauty.