HIBISCUS is annual herb native to tropical Africa, but today grows throughout many tropical areas. The flowers (calyx and bract portions) are collected when slightly immature. The major producing countries are Jamaica and Mexico. Hibiscus is known as Roselle in Jamaica and Mexico, is known as bissap in West Africa, "Gul e Khatmi" in Urdu & Persian and Orhul in India and is the national flower of many countries. Approximately 15-30 percent of the hibiscus plant is made up of plant acids, including citric acid, malic acid, tartaric acid and allo-hydroxycitric acid lactone — i.e. hibiscus acid, which is unique to hibiscus. Other chemical constituents are many; however, some of the most important include alkaloids, anthocyanins, and quercetin. Historically, hibiscus tea has been used by different cultures as a remedy for several conditions: to lower body temperature, for high blood pressure, to treat heart and nerve diseases, as a diuretic to increase urine production to treat constipation, cancer, liver disease, and cold symptoms. Pulp made from the leaves was applied to the skin to heal wounds.