Tulasi as an Ayurvedic medicine. Tulasi has an important role within many traditions of Hinduism, wherein devotees perform worship involving Tulasi plants or leaves. Every hindu family has a tulasi plant in specially built structure.
Mostly family often keep a tulasi in front of there home. In India two types of tulssi one is Krishna tulasi (Dark Tulasi) and another is Ram Tulasi (Light Tulasi).
There are 108 bids of Tulasi in one Mala it may be used either japa or for wearing on the neck. Tulasi Malas are the most suitable for meditation and japa. Devotees of Vishnu, Rama, Lord Krishna, etc wear the sacred tulasi mala on their necks as a sign of their devotion to the Lord.