Hibiscus sabdariffa (Roselle) is highly edible plant that is related to okra.  In tropical and subtropical regions around the world the leaves are consumed as a vegetable, a spicy version of spinach.  They are used in food preparation, while the calyx and flowers are used as a flavoring, coloring and for making teas.  The calyx is also used in making wine, jam, juice, jelly, and syrup, while also used as a spice.Hibiscus has more than 300 species which are distributed in tropical and subtropical regions around the world. Most hibiscus species are used as ornamental plants, but many are believed to have certain medicinal properties.