Wild Rosella (or Roselle) is a member of the Hibiscus family. Hibiscus tea is known for its extremely high content of antioxidants (mainly flavonoids). Hibiscus tea is known as one of the richest sources of Vitamin C, which plays a role for strengthening our immune system. Health benefits of Hibiscus tea include lowering blood pressure and lowering high levels of cholesterol in the blood.