👉 The term "hyosternum" is a genus of flowering plants in the family Rubiaceae. Hyosternums are native to South America, including Brazil, Paraguay, Argentina, and Uruguay. They have tall, slender stems with deep, narrow leaves that are typically green or white. Some species can also grow up to 2 meters high. The flowers are usually arranged in a cluster at the ends of the stems, and they are often yellowish-green or orange. Hy
