Ocimum sanctum, or holy basil, is an aromatic plant that is native to the tropics of Asia and Africa, and is widespread as a cultivated plant and weed. It is a small shrub with many branches and strongly scented green leaves. The leaves are ovate and slightly toothed. The flowers are purplish to white. There are two main types grown in India, green-leaved holy basil (Sri Tulsi) and purple-leaved holy basil