Scientific Name: Ocimum tenuiflorum
Tamil Name: Thulasi
Description: It is an erect, many branched shrub, tall with hairy stems and simple opposite green or purple leaves that are strongly scented. Leaves have petioles and are ovate, are long, usually slightly toothed. The flowers are purplish in elongate racemes:
Note: Tulasi is cultivated for religious and medicinal purposes, and for its essential oil. It is widely known across the Indian Subcontinent as a medicinal plant and an herbal tea, commonly used in Ayurveda, and has an important role within the Vaishnavite tradition of Hinduism, in which devotees perform worship involving holy basil plant twigs or leaves.
Photo source: http://commons.wikimedia.org/wiki/File:Ocimum_tenuiflorum