Dried Hibiscus Flower Hibiscus flower is one of the best products used in food and drink industry, researshers found out that the extract of hibiscus flower contains some of the same health-giving compounds as red wine and tea, it is probably not the flavor but the curative properties which are sought. 1.Roselle belongs to malvaceae, annual herbaceous plants. 2.Its leaves and flowers can be made into medicine, benefit for bringing high pressure down, diuretic, relieving a cough, detoxifying, stimulating bile, e.t.c. 3.In foreign countries, Roselle is used to cure hypertension, atherosclerosis,e.t.c. 4.Calyx can be used to extract natural food color. It’s the raw material of medicine,beverage,wine and other food .