Ocimum tenuiflorum, commonly known as holy basil or tulsi, is an aromatic perennial plant in the family Lamiaceae. It is native to the Indian subcontinent and widespread as a cultivated plant throughout the Southeast Asian tropics.

Tulsi, Tulasi or Vrinda (Holy Basil) is a sacred plant in Hindu belief. Hindus regard it as an earthly manifestation of the goddess Tulsi; she is regarded as the avatar of Lakshmi, and thus the consort of the god Vishnu. In the story, she married Jalandhara. The offering of its leaves is recommended in ritualistic worship of Vishnu and his avatars like Krishna and Vithoba.