The tulsi shrub is an erect plant which grows to a height of 50 to 60 cm tall. It has hairy stems, opposite ovate leaves and purple flowers. Leaves have strong scent. There are two types of tulsi
1. Krishna tulsi – Has purple leaves
2. Shri tulsi – Has Green leaves
Texts of ayurveda describe the properties of tulsi as follows. It is light to digest and dries tissue secretions. Tulsi tastes hot and bitter. It can penetrate deep tissues and has anti helmenthic properties. Due to these properties it normalizes kapha and vata. Leaves, flowers, seeds and roots of Tulsi are used in ayurvedic preparations.