A variety of Mehndi Flower. Mehndi, also known as henna, is made from the leaves of the mehndi shrub that is indigenous to South Asia.It is a thorny shrub with tiny leaves and thrives in subtropical climes. When the dried leaves are mixed with essential oils or water, the paste imparts a burgundy red colour. Mehndi oil is an essential oil and can be extracted from tea tree, ravensara and cajeput. This oil contains high levels of terpenes, which are naturally produced by the plants.