Borage (/ˈbɒr.ɪdʒ/ , Borago officinalis), also known as a starflower, is an annual herb in the flowering plant family Boraginaceae.It is native to the Mediterranean region and has naturalized in many other locales.orage is also traditionally used as a garnish in the Pimms Cup cocktail, but is nowadays often replaced by a long sliver of cucumber peel or by mint. It is also one of the key Botanical flavourings in Gilpin's Westmorland Extra Dry Gin.