Ocimum tenuiflorum syn. sanctum ~ holy basil or tulsi and tulasi in South Asia, it is an important sacred plant in Hinduism. The essential oil from some populations of holy basil contains high levels of eugenol. In traditional Thai medicine, the leaf or whole plant is used to alleviate nausea, vomiting, diarrhoea and flatulence, antibacterial, Fresh flowers are used to treat coughs and colds. Native to tropical and subtropical Asia.