👉 Opisthedna is a genus of flowering plants in the family Asteraceae, which belongs to the order Asterales and the suborder Asteraceae. It contains more than 100 species that are native to South America. These plants produce flowers with five sepals and four petals, known as tepals. They are characterized by their long, slender stems, which can grow up to 2 meters tall. Some of these plants have unique features such as the presence of a st